docs(reference): regenerate after perf series

Picks up new symbols from the perf commits: Context typed fields and Set method, header/buf pool vars in client and transport.

.benchstats/after_step1.txt

@@ -0,0 +1,17 @@
+After: static-header-slices + bool-fast-path
+goos: darwin
+goarch: arm64
+pkg: github.com/lukaszraczylo/go-telegram/client
+cpu: Apple M4 Max
+BenchmarkCall_BoolResponse-16      	 4597374	       526.3 ns/op	    1842 B/op	      14 allocs/op
+BenchmarkCall_StructResponse-16    	 3740096	       679.6 ns/op	    1973 B/op	      16 allocs/op
+BenchmarkEncodeJSONBody-16         	41997352	        58.35 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	863273641	         2.872 ns/op	       0 B/op	       0 allocs/op
+BenchmarkDecodeResult_Struct-16    	19988096	       100.3 ns/op	     144 B/op	       2 allocs/op
+
+Deltas vs baseline (allocs/op):
+  Call_BoolResponse:    18 -> 14 (-4)
+  Call_StructResponse:  18 -> 16 (-2)
+  DecodeResult_Bool:     2 -> 0  (-2, also -94% ns)
+  DecodeResult_Struct:   2 -> 2  (flat)
+  EncodeJSONBody:        2 -> 2  (flat)

.benchstats/after_step2.txt

@@ -0,0 +1,27 @@
+After: static-headers + bool-fast-path + lazy-Context.Values
+goos: darwin
+goarch: arm64
+cpu: Apple M4 Max
+
+pkg: github.com/lukaszraczylo/go-telegram/client
+BenchmarkCall_BoolResponse-16      	 4597374	       526.3 ns/op	    1842 B/op	      14 allocs/op
+BenchmarkCall_StructResponse-16    	 3740096	       679.6 ns/op	    1973 B/op	      16 allocs/op
+BenchmarkEncodeJSONBody-16         	41997352	        58.35 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	863273641	         2.872 ns/op	       0 B/op	       0 allocs/op
+BenchmarkDecodeResult_Struct-16    	19988096	       100.3 ns/op	     144 B/op	       2 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/dispatch
+BenchmarkRouter_DispatchCommand-16      	14912385	       156.4 ns/op	     416 B/op	       5 allocs/op
+BenchmarkRouter_DispatchTextRegex-16    	12495229	       187.7 ns/op	     428 B/op	       5 allocs/op
+BenchmarkRouter_DispatchFilter-16       	148631502	        16.11 ns/op	      48 B/op	       1 allocs/op
+BenchmarkRouter_NewContext-16           	1000000000	         1.608 ns/op	       0 B/op	       0 allocs/op
+BenchmarkExtractCommand-16              	25267845	        92.52 ns/op	       0 B/op	       0 allocs/op
+
+Cumulative deltas vs baseline:
+  Call_BoolResponse:    18 -> 14 allocs (-4)
+  Call_StructResponse:  18 -> 16 allocs (-2)
+  DecodeResult_Bool:     2 -> 0  allocs (-2, also 50ns -> 2.87ns)
+  DispatchFilter:        2 -> 1  alloc  (-1, also 32ns -> 16ns)
+  NewContext:            5.79ns -> 1.61ns (-72%)
+  DispatchCommand:       5 -> 5  allocs (flat — map alloc shifted from NewContext to first Set)
+  DispatchTextRegex:     5 -> 5  allocs (flat — same reason)

.benchstats/after_step3.txt

@@ -0,0 +1,27 @@
+After: static-headers + bool-fast-path + lazy-Values + typed-fields
+goos: darwin
+goarch: arm64
+cpu: Apple M4 Max
+
+pkg: github.com/lukaszraczylo/go-telegram/client
+BenchmarkCall_BoolResponse-16      	 4597374	       526.3 ns/op	    1842 B/op	      14 allocs/op
+BenchmarkCall_StructResponse-16    	 3740096	       679.6 ns/op	    1973 B/op	      16 allocs/op
+BenchmarkEncodeJSONBody-16         	41997352	        58.35 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	863273641	         2.872 ns/op	       0 B/op	       0 allocs/op
+BenchmarkDecodeResult_Struct-16    	19988096	       100.3 ns/op	     144 B/op	       2 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/dispatch
+BenchmarkRouter_DispatchCommand-16      	34631486	        69.19 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_DispatchTextRegex-16    	23260198	       106.6 ns/op	     112 B/op	       2 allocs/op
+BenchmarkRouter_DispatchFilter-16       	126697654	        19.03 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_NewContext-16           	1000000000	         1.600 ns/op	       0 B/op	       0 allocs/op
+BenchmarkExtractCommand-16              	27345622	        87.25 ns/op	       0 B/op	       0 allocs/op
+
+Cumulative deltas vs baseline (allocs/op):
+  Call_BoolResponse:    18 -> 14 allocs (-4)
+  Call_StructResponse:  18 -> 16 allocs (-2)
+  DecodeResult_Bool:     2 -> 0  allocs (-2, also 50ns -> 2.87ns)
+  DispatchCommand:       5 -> 1  alloc  (-4, also 153ns -> 69ns)
+  DispatchTextRegex:     5 -> 2  allocs (-3, also 181ns -> 107ns)
+  DispatchFilter:        2 -> 1  alloc  (-1, but +48B from larger Context struct)
+  NewContext:            5.79ns -> 1.60ns (-72%)

.benchstats/after_step4.txt

@@ -0,0 +1,26 @@
+After: static-headers + bool-fast-path + lazy-Values + typed-fields + resp-buffer-pool
+goos: darwin
+goarch: arm64
+cpu: Apple M4 Max
+
+pkg: github.com/lukaszraczylo/go-telegram/client
+BenchmarkCall_BoolResponse-16      	 4811347	       478.7 ns/op	    1331 B/op	      13 allocs/op
+BenchmarkCall_StructResponse-16    	 4038770	       591.6 ns/op	    1462 B/op	      15 allocs/op
+BenchmarkEncodeJSONBody-16         	47025052	        51.30 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	853161562	         2.824 ns/op	       0 B/op	       0 allocs/op
+BenchmarkDecodeResult_Struct-16    	26811634	        88.80 ns/op	     144 B/op	       2 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/dispatch
+BenchmarkRouter_DispatchCommand-16      	34631486	        69.19 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_DispatchTextRegex-16    	23260198	       106.6 ns/op	     112 B/op	       2 allocs/op
+BenchmarkRouter_DispatchFilter-16       	126697654	        19.03 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_NewContext-16           	1000000000	         1.600 ns/op	       0 B/op	       0 allocs/op
+BenchmarkExtractCommand-16              	27345622	        87.25 ns/op	       0 B/op	       0 allocs/op
+
+Cumulative deltas vs baseline:
+  Call_BoolResponse:    634ns / 18 allocs / 1957B  ->  479ns / 13 allocs / 1331B  (-24% / -5 / -626B)
+  Call_StructResponse:  665ns / 18 allocs / 2005B  ->  592ns / 15 allocs / 1462B  (-11% / -3 / -543B)
+  DecodeResult_Bool:     50ns /  2 allocs /   80B  -> 2.8ns /  0 allocs /    0B
+  DispatchCommand:      153ns /  5 allocs /  416B  ->   69ns /  1 alloc  /   96B  (-55% / -4 / -320B)
+  DispatchTextRegex:    181ns /  5 allocs /  428B  ->  107ns /  2 allocs /  112B  (-41% / -3 / -316B)
+  DispatchFilter:        32ns /  2 allocs /   96B  ->   19ns /  1 alloc  /   96B  (-41% / -1)

.benchstats/after_step5.txt

@@ -0,0 +1,30 @@
+After: static-headers + bool-fast-path + lazy-Values + typed-fields + resp-buffer-pool + webhook-pool
+goos: darwin
+goarch: arm64
+cpu: Apple M4 Max
+
+pkg: github.com/lukaszraczylo/go-telegram/client
+BenchmarkCall_BoolResponse-16      	 4811347	       478.7 ns/op	    1331 B/op	      13 allocs/op
+BenchmarkCall_StructResponse-16    	 4038770	       591.6 ns/op	    1462 B/op	      15 allocs/op
+BenchmarkEncodeJSONBody-16         	47025052	        51.30 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	853161562	         2.824 ns/op	       0 B/op	       0 allocs/op
+BenchmarkDecodeResult_Struct-16    	26811634	        88.80 ns/op	     144 B/op	       2 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/transport
+BenchmarkWebhook_ServeHTTP-16    	 1204390	      2020 ns/op	    7648 B/op	      23 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/dispatch
+BenchmarkRouter_DispatchCommand-16      	34631486	        69.19 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_DispatchTextRegex-16    	23260198	       106.6 ns/op	     112 B/op	       2 allocs/op
+BenchmarkRouter_DispatchFilter-16       	126697654	        19.03 ns/op	      96 B/op	       1 allocs/op
+BenchmarkRouter_NewContext-16           	1000000000	         1.600 ns/op	       0 B/op	       0 allocs/op
+BenchmarkExtractCommand-16              	27345622	        87.25 ns/op	       0 B/op	       0 allocs/op
+
+Cumulative deltas vs baseline:
+  Call_BoolResponse:    634ns / 18 allocs / 1957B   ->  479ns / 13 / 1331B   (-24% / -5  / -626B)
+  Call_StructResponse:  665ns / 18 allocs / 2005B   ->  592ns / 15 / 1462B   (-11% / -3  / -543B)
+  DecodeResult_Bool:     50ns /  2 allocs /   80B   -> 2.8ns /  0 /    0B
+  Webhook_ServeHTTP:   2564ns / 24 allocs / 12707B  -> 2020ns / 23 / 7648B   (-21% / -1  / -5059B)
+  DispatchCommand:      153ns /  5 allocs /  416B   ->   69ns /  1 /   96B   (-55% / -4  / -320B)
+  DispatchTextRegex:    181ns /  5 allocs /  428B   ->  107ns /  2 /  112B   (-41% / -3  / -316B)
+  DispatchFilter:        32ns /  2 allocs /   96B   ->   19ns /  1 /   96B   (-41% / -1)

.benchstats/baseline.txt

@@ -0,0 +1,19 @@
+goos: darwin
+goarch: arm64
+pkg: github.com/lukaszraczylo/go-telegram/client
+cpu: Apple M4 Max
+BenchmarkCall_BoolResponse-16      	 1875306	       633.9 ns/op	    1957 B/op	      18 allocs/op
+BenchmarkCall_StructResponse-16    	 1805024	       665.2 ns/op	    2005 B/op	      18 allocs/op
+BenchmarkEncodeJSONBody-16         	23345811	        51.55 ns/op	      96 B/op	       2 allocs/op
+BenchmarkDecodeResult_Bool-16      	23832240	        50.37 ns/op	      80 B/op	       2 allocs/op
+BenchmarkDecodeResult_Struct-16    	13511192	        92.64 ns/op	     144 B/op	       2 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/transport
+BenchmarkWebhook_ServeHTTP-16    	  465798	      2564 ns/op	   12707 B/op	      24 allocs/op
+
+pkg: github.com/lukaszraczylo/go-telegram/dispatch
+BenchmarkRouter_DispatchCommand-16      	 7303522	       152.7 ns/op	     416 B/op	       5 allocs/op
+BenchmarkRouter_DispatchTextRegex-16    	 6740305	       180.5 ns/op	     428 B/op	       5 allocs/op
+BenchmarkRouter_DispatchFilter-16       	39479149	        32.18 ns/op	      96 B/op	       2 allocs/op
+BenchmarkRouter_NewContext-16           	208260764	         5.790 ns/op	       0 B/op	       0 allocs/op
+BenchmarkExtractCommand-16              	12988816	        92.69 ns/op	       0 B/op	       0 allocs/op

client/call.go

@@ -8,8 +8,36 @@ import (
 	"io"
 	"net/http"
 	"reflect"
+	"sync"
 )
 
+var (
+	headerJSONValue = []string{"application/json"}
+	rawOKTrueBody   = []byte(`{"ok":true,"result":true}`)
+	rawOKFalseBody  = []byte(`{"ok":true,"result":false}`)
+
+	// respBufPool reuses *bytes.Buffer for response body reads. Used on
+	// paths whose decoder copies strings out of the input (decodeResult,
+	// which delegates to goccy/go-json), so the buffer can be returned to
+	// the pool as soon as Unmarshal has run. CallRaw and callMultipartRaw
+	// return slices that alias the buffer and therefore cannot use the
+	// pool without an extra copy that would defeat the point.
+	respBufPool = sync.Pool{New: func() any { return new(bytes.Buffer) }}
+)
+
+// maxPooledBufCap caps the buffer size returned to respBufPool. Buffers
+// larger than this are dropped on the floor so a single huge response
+// (e.g. a large getFile metadata payload) doesn't bloat the pool for the
+// rest of the process lifetime.
+const maxPooledBufCap = 64 * 1024
+
+func putRespBuf(buf *bytes.Buffer) {
+	if buf.Cap() > maxPooledBufCap {
+		return
+	}
+	respBufPool.Put(buf)
+}
+
 // Call is the single point through which every Telegram Bot API method
 // invocation flows. It marshals the request, signs the URL with the bot
 // token, dispatches via HTTPDoer, decodes the Result envelope, and
@@ -44,8 +72,8 @@ func Call[Req any, Resp any](ctx context.Context, b *Bot, method string, req Req
 	if err != nil {
 		return zero, &NetworkError{Err: err}
 	}
-	httpReq.Header.Set("Content-Type", "application/json")
-	httpReq.Header.Set("Accept", "application/json")
+	httpReq.Header["Content-Type"] = headerJSONValue
+	httpReq.Header["Accept"] = headerJSONValue
 
 	resp, err := b.http.Do(httpReq)
 	if err != nil {
@@ -57,12 +85,14 @@ func Call[Req any, Resp any](ctx context.Context, b *Bot, method string, req Req
 	}
 	defer func() { _ = resp.Body.Close() }()
 
-	raw, err := io.ReadAll(resp.Body)
-	if err != nil {
+	buf := respBufPool.Get().(*bytes.Buffer)
+	buf.Reset()
+	defer putRespBuf(buf)
+	if _, err := buf.ReadFrom(resp.Body); err != nil {
 		return zero, &NetworkError{Err: err}
 	}
 
-	return decodeResult[Resp](b.codec, raw)
+	return decodeResult[Resp](b.codec, buf.Bytes())
 }
 
 // CallRaw is like Call but returns the raw JSON of the result field
@@ -91,8 +121,8 @@ func CallRaw[Req any](ctx context.Context, b *Bot, method string, req Req) (json
 	if err != nil {
 		return nil, &NetworkError{Err: err}
 	}
-	httpReq.Header.Set("Content-Type", "application/json")
-	httpReq.Header.Set("Accept", "application/json")
+	httpReq.Header["Content-Type"] = headerJSONValue
+	httpReq.Header["Accept"] = headerJSONValue
 
 	resp, err := b.http.Do(httpReq)
 	if err != nil {
@@ -139,8 +169,22 @@ func encodeJSONBody(codec Codec, req any) (io.Reader, error) {
 
 // decodeResult unmarshals raw into Result[Resp] and translates non-OK
 // responses into *APIError.
+//
+// Bool fast path: ~60% of Telegram methods return bool. The Telegram API
+// emits the result envelope with no whitespace, so a byte-equality check
+// against the two canonical bodies skips the generic Unmarshal entirely.
+// Anything that doesn't match exactly (e.g. responses with extra fields,
+// errors) falls through to the slow path.
 func decodeResult[Resp any](codec Codec, raw []byte) (Resp, error) {
 	var zero Resp
+	if _, isBool := any(zero).(bool); isBool {
+		switch {
+		case bytes.Equal(raw, rawOKTrueBody):
+			return any(true).(Resp), nil
+		case bytes.Equal(raw, rawOKFalseBody):
+			return any(false).(Resp), nil
+		}
+	}
 	var env Result[Resp]
 	if err := codec.Unmarshal(raw, &env); err != nil {
 		return zero, &ParseError{Err: err, Body: copyBody(raw)}

client/call_bench_test.go

@@ -0,0 +1,94 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net/http"
+	"testing"
+)
+
+// stubDoer returns the same canned response body for every request. It
+// is intentionally minimal — testify mock has its own overhead that
+// would dominate the per-call cost we want to measure.
+type stubDoer struct{ body []byte }
+
+func (s *stubDoer) Do(_ *http.Request) (*http.Response, error) {
+	return &http.Response{
+		StatusCode: http.StatusOK,
+		Body:       io.NopCloser(bytes.NewReader(s.body)),
+		Header:     http.Header{},
+	}, nil
+}
+
+type benchSendReq struct {
+	ChatID int64  `json:"chat_id"`
+	Text   string `json:"text"`
+}
+
+type benchMsgResp struct {
+	MessageID int64  `json:"message_id"`
+	Date      int64  `json:"date"`
+	Text      string `json:"text"`
+}
+
+func BenchmarkCall_BoolResponse(b *testing.B) {
+	d := &stubDoer{body: []byte(`{"ok":true,"result":true}`)}
+	bot := New("123:abc", WithHTTPClient(d))
+	ctx := context.Background()
+	req := &benchSendReq{ChatID: 42, Text: "hi"}
+	b.ReportAllocs()
+	for b.Loop() {
+		if _, err := Call[*benchSendReq, bool](ctx, bot, "setMyCommands", req); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkCall_StructResponse(b *testing.B) {
+	d := &stubDoer{body: []byte(`{"ok":true,"result":{"message_id":1,"date":0,"text":"ok"}}`)}
+	bot := New("123:abc", WithHTTPClient(d))
+	ctx := context.Background()
+	req := &benchSendReq{ChatID: 42, Text: "hi"}
+	b.ReportAllocs()
+	for b.Loop() {
+		if _, err := Call[*benchSendReq, benchMsgResp](ctx, bot, "sendMessage", req); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkEncodeJSONBody(b *testing.B) {
+	codec := DefaultCodec{}
+	req := &benchSendReq{ChatID: 42, Text: "hello, world"}
+	b.ReportAllocs()
+	for b.Loop() {
+		r, err := encodeJSONBody(codec, req)
+		if err != nil {
+			b.Fatal(err)
+		}
+		_ = r
+	}
+}
+
+func BenchmarkDecodeResult_Bool(b *testing.B) {
+	codec := DefaultCodec{}
+	raw := []byte(`{"ok":true,"result":true}`)
+	b.ReportAllocs()
+	for b.Loop() {
+		if _, err := decodeResult[bool](codec, raw); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkDecodeResult_Struct(b *testing.B) {
+	codec := DefaultCodec{}
+	raw := []byte(`{"ok":true,"result":{"message_id":1,"date":0,"text":"ok"}}`)
+	b.ReportAllocs()
+	for b.Loop() {
+		if _, err := decodeResult[benchMsgResp](codec, raw); err != nil {
+			b.Fatal(err)
+		}
+	}
+}

client/multipart.go

@@ -1,6 +1,7 @@
 package client
 
 import (
+	"bytes"
 	"context"
 	"github.com/goccy/go-json"
 	"io"
@@ -69,7 +70,7 @@ func callMultipart[Resp any](ctx context.Context, b *Bot, method string, mp mult
 		return zero, &NetworkError{Err: err}
 	}
 	req.Header.Set("Content-Type", mw.FormDataContentType())
-	req.Header.Set("Accept", "application/json")
+	req.Header["Accept"] = headerJSONValue
 
 	resp, err := b.http.Do(req)
 	if err != nil {
@@ -81,12 +82,14 @@ func callMultipart[Resp any](ctx context.Context, b *Bot, method string, mp mult
 	}
 	defer func() { _ = resp.Body.Close() }()
 
-	raw, err := io.ReadAll(resp.Body)
-	if err != nil {
+	buf := respBufPool.Get().(*bytes.Buffer)
+	buf.Reset()
+	defer putRespBuf(buf)
+	if _, err := buf.ReadFrom(resp.Body); err != nil {
 		_ = pr.CloseWithError(err)
 		return zero, &NetworkError{Err: err}
 	}
-	return decodeResult[Resp](b.codec, raw)
+	return decodeResult[Resp](b.codec, buf.Bytes())
 }
 
 // callMultipartRaw is callMultipart's sibling that returns the raw result
@@ -125,7 +128,7 @@ func callMultipartRaw(ctx context.Context, b *Bot, method string, mp multipartRe
 		return nil, &NetworkError{Err: err}
 	}
 	req.Header.Set("Content-Type", mw.FormDataContentType())
-	req.Header.Set("Accept", "application/json")
+	req.Header["Accept"] = headerJSONValue
 
 	resp, err := b.http.Do(req)
 	if err != nil {

dispatch/context.go

@@ -21,20 +21,45 @@ import (
 // Update is the raw update; payload-typed handlers also receive a
 // narrowed pointer to one of its sub-fields.
 //
-// Values is a per-update bag matchers populate. Conventional keys:
+// Command, CommandArgs and RegexMatch are populated by the router for
+// the matching route kind; they replace the previous "command",
+// "command_args" and "regex_match" entries in Values, which were the
+// only conventional keys. Values remains for user-defined custom keys.
 //
-//	"command":      string, the matched bot command (e.g. "/start")
-//	"command_args": string, everything after the command
-//	"regex_match":  []string, regex sub-matches when OnText matches
+// Command is the matched bot command (e.g. "/start"); empty when the
+// route is not a command match.
+//
+// CommandArgs is everything after the command; empty when no command
+// matched or the command had no trailing text.
+//
+// RegexMatch is the regex sub-matches when an OnText/OnCallback regex
+// route matched; nil otherwise.
+//
+// Values is lazily allocated for user-defined keys. Handlers that don't
+// write pay no allocation. Reads against a nil map return the zero
+// value. Writers must use Set instead of indexing the map directly.
 type Context struct {
-	Ctx    context.Context
-	Bot    *client.Bot
-	Update *api.Update
-	Values map[string]any
+	Ctx         context.Context
+	Bot         *client.Bot
+	Update      *api.Update
+	Command     string
+	CommandArgs string
+	RegexMatch  []string
+	Values      map[string]any
 }
 
 // NewContext constructs a Context. Used by Router internally; exposed for
 // custom test harnesses.
 func NewContext(ctx context.Context, b *client.Bot, u *api.Update) *Context {
-	return &Context{Ctx: ctx, Bot: b, Update: u, Values: map[string]any{}}
+	return &Context{Ctx: ctx, Bot: b, Update: u}
+}
+
+// Set writes key/val into Values, allocating the map on first use. Use
+// this instead of `c.Values[k] = v` so the no-write path stays
+// allocation-free.
+func (c *Context) Set(key string, val any) {
+	if c.Values == nil {
+		c.Values = make(map[string]any, 2)
+	}
+	c.Values[key] = val
 }

dispatch/groups.go

@@ -138,8 +138,8 @@ func (r *Router) runGroupHandlers(c *Context, m *api.Message, g int) (matched bo
 			if route.group != g || route.cmd != cmd {
 				continue
 			}
-			c.Values["command"] = cmd
-			c.Values["command_args"] = args
+			c.Command = cmd
+			c.CommandArgs = args
 			if err := route.handler(c, m); err != nil {
 				if errors.Is(err, ErrContinueGroups) {
 					continue
@@ -159,7 +159,7 @@ func (r *Router) runGroupHandlers(c *Context, m *api.Message, g int) (matched bo
 			if subs == nil {
 				continue
 			}
-			c.Values["regex_match"] = subs
+			c.RegexMatch = subs
 			if err := route.handler(c, m); err != nil {
 				if errors.Is(err, ErrContinueGroups) {
 					continue

dispatch/router.go

@@ -467,8 +467,8 @@ func (r *Router) handleMessage(c *Context, m *api.Message) error {
 	if cmd, args, ok := extractCommand(m); ok {
 		for _, route := range r.commands {
 			if route.cmd == cmd {
-				c.Values["command"] = cmd
-				c.Values["command_args"] = args
+				c.Command = cmd
+				c.CommandArgs = args
 				return route.handler(c, m)
 			}
 		}
@@ -477,7 +477,7 @@ func (r *Router) handleMessage(c *Context, m *api.Message) error {
 	if m.Text != "" {
 		for _, route := range r.texts {
 			if subs := route.re.FindStringSubmatch(m.Text); subs != nil {
-				c.Values["regex_match"] = subs
+				c.RegexMatch = subs
 				return route.handler(c, m)
 			}
 		}
@@ -495,7 +495,7 @@ func (r *Router) handleMessage(c *Context, m *api.Message) error {
 func (r *Router) handleCallback(c *Context, q *api.CallbackQuery) error {
 	for _, route := range r.callbacks {
 		if subs := route.re.FindStringSubmatch(q.Data); subs != nil {
-			c.Values["regex_match"] = subs
+			c.RegexMatch = subs
 			return route.handler(c, q)
 		}
 	}

dispatch/router_bench_test.go

@@ -0,0 +1,89 @@
+package dispatch
+
+import (
+	"context"
+	"testing"
+
+	"github.com/lukaszraczylo/go-telegram/api"
+	"github.com/lukaszraczylo/go-telegram/client"
+)
+
+func BenchmarkRouter_DispatchCommand(b *testing.B) {
+	r := New(client.New("t"))
+	r.OnCommand("/start", func(c *Context, m *api.Message) error { return nil })
+	u := cmdMessage("/start hello")
+	ctx := context.Background()
+	b.ReportAllocs()
+	for b.Loop() {
+		c := NewContext(ctx, r.bot, &u)
+		_ = r.dispatch(c, &u)
+	}
+}
+
+func BenchmarkRouter_DispatchTextRegex(b *testing.B) {
+	r := New(client.New("t"))
+	r.OnText("^hello.*", func(c *Context, m *api.Message) error { return nil })
+	u := api.Update{
+		UpdateID: 1,
+		Message: &api.Message{
+			MessageID: 1, Date: 0,
+			Chat: api.Chat{ID: 1, Type: api.ChatTypePrivate},
+			Text: "hello world",
+		},
+	}
+	ctx := context.Background()
+	b.ReportAllocs()
+	for b.Loop() {
+		c := NewContext(ctx, r.bot, &u)
+		_ = r.dispatch(c, &u)
+	}
+}
+
+func BenchmarkRouter_DispatchFilter(b *testing.B) {
+	r := New(client.New("t"))
+	r.OnMessageFilter(
+		func(m *api.Message) bool { return m != nil && m.Text == "ping" },
+		func(c *Context, m *api.Message) error { return nil },
+	)
+	u := api.Update{
+		UpdateID: 1,
+		Message: &api.Message{
+			MessageID: 1, Date: 0,
+			Chat: api.Chat{ID: 1, Type: api.ChatTypePrivate},
+			Text: "ping",
+		},
+	}
+	ctx := context.Background()
+	b.ReportAllocs()
+	for b.Loop() {
+		c := NewContext(ctx, r.bot, &u)
+		_ = r.dispatch(c, &u)
+	}
+}
+
+func BenchmarkRouter_NewContext(b *testing.B) {
+	bot := client.New("t")
+	u := &api.Update{UpdateID: 1}
+	ctx := context.Background()
+	b.ReportAllocs()
+	for b.Loop() {
+		_ = NewContext(ctx, bot, u)
+	}
+}
+
+func BenchmarkExtractCommand(b *testing.B) {
+	text := "/start@BotName hello world"
+	cmdLen := len("/start@BotName")
+	m := &api.Message{
+		MessageID: 1, Date: 0,
+		Chat: api.Chat{ID: 1, Type: api.ChatTypePrivate},
+		Text: text,
+		Entities: []api.MessageEntity{
+			{Type: api.MessageEntityTypeBotCommand, Offset: 0, Length: int64(cmdLen)},
+		},
+	}
+	b.ReportAllocs()
+	for b.Loop() {
+		_, _, _ = extractCommand(m)
+	}
+}

dispatch/router_test.go

@@ -52,7 +52,7 @@ func TestRouter_OnCommandMatches(t *testing.T) {
 	r := New(b)
 	hit := make(chan string, 1)
 	r.OnCommand("/start", func(c *Context, m *api.Message) error {
-		hit <- c.Values["command"].(string)
+		hit <- c.Command
 		return nil
 	})
 
@@ -82,7 +82,7 @@ func TestRouter_OnText(t *testing.T) {
 	r := New(client.New("t"))
 	hit := make(chan []string, 1)
 	r.OnText(`^hello (\w+)$`, func(c *Context, m *api.Message) error {
-		hit <- c.Values["regex_match"].([]string)
+		hit <- c.RegexMatch
 		return nil
 	})
 
@@ -164,10 +164,7 @@ func TestRouter_NonASCIICommand(t *testing.T) {
 	r := New(client.New("t"))
 	hit := make(chan [2]string, 1)
 	r.OnCommand("/старт", func(c *Context, m *api.Message) error {
-		hit <- [2]string{
-			c.Values["command"].(string),
-			c.Values["command_args"].(string),
-		}
+		hit <- [2]string{c.Command, c.CommandArgs}
 		return nil
 	})
 
@@ -180,16 +177,15 @@ func TestRouter_NonASCIICommand(t *testing.T) {
 	require.Equal(t, "аргумент", got[1])
 }
 
-// TestRouter_CommandValuesNotLeakedOnNoMatch verifies that c.Values["command"]
-// is not set when a command entity is present but no route matches, so a
+// TestRouter_CommandValuesNotLeakedOnNoMatch verifies that c.Command is
+// empty when a command entity is present but no route matches, so a
 // subsequent text handler doesn't see stale values.
 func TestRouter_CommandValuesNotLeakedOnNoMatch(t *testing.T) {
 	r := New(client.New("t"))
 	// Register a text handler that should fire as fallback.
 	leaked := make(chan bool, 1)
 	r.OnText(`.*`, func(c *Context, m *api.Message) error {
-		_, hasCmd := c.Values["command"]
-		leaked <- hasCmd
+		leaked <- c.Command != ""
 		return nil
 	})
 	// No OnCommand registered, so the command entity won't match any route.

docs/reference/client.md

@@ -80,7 +80,7 @@ var (
 ```
 
 <a name="Call"></a>
-## func [Call](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/call.go#L25>)
+## func [Call](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/call.go#L53>)
 
 ```go
 func Call[Req any, Resp any](ctx context.Context, b *Bot, method string, req Req) (Resp, error)
@@ -93,7 +93,7 @@ It is generic over both request and response types. Methods with no parameters m
 Call is exported because the api package \(which lives outside this one\) invokes it from generated method wrappers. User code should not normally call it directly — use the typed wrappers in package api instead.
 
 <a name="CallRaw"></a>
-## func [CallRaw](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/call.go#L74>)
+## func [CallRaw](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/call.go#L104>)
 
 ```go
 func CallRaw[Req any](ctx context.Context, b *Bot, method string, req Req) (json.RawMessage, error)
@@ -296,7 +296,7 @@ type Logger interface {
 ```
 
 <a name="MultipartFile"></a>
-## type [MultipartFile](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/multipart.go#L27-L31>)
+## type [MultipartFile](<https://github.com/lukaszraczylo/go-telegram/blob/main/client/multipart.go#L28-L32>)
 
 MultipartFile describes a single file part in a multipart upload.
 

docs/reference/dispatch.md

@@ -13,6 +13,7 @@ Package dispatch provides a typed router for Telegram updates. It consumes any t
 - [Variables](<#variables>)
 - [type Context](<#Context>)
   - [func NewContext\(ctx context.Context, b \*client.Bot, u \*api.Update\) \*Context](<#NewContext>)
+  - [func \(c \*Context\) Set\(key string, val any\)](<#Context.Set>)
 - [type Filter](<#Filter>)
   - [func All\[T any\]\(filters ...Filter\[T\]\) Filter\[T\]](<#All>)
   - [func Any\[T any\]\(filters ...Filter\[T\]\) Filter\[T\]](<#Any>)
@@ -90,7 +91,7 @@ var ErrEndGroups = errors.New("dispatch: end groups")
 ```
 
 <a name="Context"></a>
-## type [Context](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/context.go#L29-L34>)
+## type [Context](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/context.go#L41-L49>)
 
 Context bundles the per\-update state every handler receives.
 
@@ -100,25 +101,30 @@ Bot is the API client. Handlers reply by calling api.SendMessage\(c.Ctx, c.Bot,
 
 Update is the raw update; payload\-typed handlers also receive a narrowed pointer to one of its sub\-fields.
 
-Values is a per\-update bag matchers populate. Conventional keys:
+Command, CommandArgs and RegexMatch are populated by the router for the matching route kind; they replace the previous "command", "command\_args" and "regex\_match" entries in Values, which were the only conventional keys. Values remains for user\-defined custom keys.
 
-```
-"command":      string, the matched bot command (e.g. "/start")
-"command_args": string, everything after the command
-"regex_match":  []string, regex sub-matches when OnText matches
-```
+Command is the matched bot command \(e.g. "/start"\); empty when the route is not a command match.
+
+CommandArgs is everything after the command; empty when no command matched or the command had no trailing text.
+
+RegexMatch is the regex sub\-matches when an OnText/OnCallback regex route matched; nil otherwise.
+
+Values is lazily allocated for user\-defined keys. Handlers that don't write pay no allocation. Reads against a nil map return the zero value. Writers must use Set instead of indexing the map directly.
 
 ```go
 type Context struct {
-    Ctx    context.Context
-    Bot    *client.Bot
-    Update *api.Update
-    Values map[string]any
+    Ctx         context.Context
+    Bot         *client.Bot
+    Update      *api.Update
+    Command     string
+    CommandArgs string
+    RegexMatch  []string
+    Values      map[string]any
 }
 ```
 
 <a name="NewContext"></a>
-### func [NewContext](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/context.go#L38>)
+### func [NewContext](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/context.go#L53>)
 
 ```go
 func NewContext(ctx context.Context, b *client.Bot, u *api.Update) *Context
@@ -126,6 +132,15 @@ func NewContext(ctx context.Context, b *client.Bot, u *api.Update) *Context
 
 NewContext constructs a Context. Used by Router internally; exposed for custom test harnesses.
 
+<a name="Context.Set"></a>
+### func \(\*Context\) [Set](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/context.go#L60>)
+
+```go
+func (c *Context) Set(key string, val any)
+```
+
+Set writes key/val into Values, allocating the map on first use. Use this instead of \`c.Values\[k\] = v\` so the no\-write path stays allocation\-free.
+
 <a name="Filter"></a>
 ## type [Filter](<https://github.com/lukaszraczylo/go-telegram/blob/main/dispatch/filter.go#L9>)
 

docs/reference/transport.md

@@ -154,7 +154,7 @@ type Updater interface {
 ```
 
 <a name="WebhookOption"></a>
-## type [WebhookOption](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L38>)
+## type [WebhookOption](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L57>)
 
 WebhookOption configures a WebhookServer at construction time.
 
@@ -163,7 +163,7 @@ type WebhookOption func(*webhookOptions)
 ```
 
 <a name="WithBufferSize"></a>
-### func [WithBufferSize](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L46>)
+### func [WithBufferSize](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L65>)
 
 ```go
 func WithBufferSize(n int) WebhookOption
@@ -172,7 +172,7 @@ func WithBufferSize(n int) WebhookOption
 WithBufferSize sets the size of the updates channel buffer. Default is 64.
 
 <a name="WebhookServer"></a>
-## type [WebhookServer](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L24-L35>)
+## type [WebhookServer](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L43-L54>)
 
 WebhookServer implements Updater by exposing an http.Handler that receives updates from Telegram. It can be mounted on the user's own HTTP server \(via ServeHTTP\) or run standalone \(via ListenAndServe\).
 
@@ -185,7 +185,7 @@ type WebhookServer struct {
 ```
 
 <a name="NewWebhookServer"></a>
-### func [NewWebhookServer](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L52>)
+### func [NewWebhookServer](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L71>)
 
 ```go
 func NewWebhookServer(b *client.Bot, opts ...WebhookOption) *WebhookServer
@@ -194,7 +194,7 @@ func NewWebhookServer(b *client.Bot, opts ...WebhookOption) *WebhookServer
 NewWebhookServer constructs a WebhookServer with default buffer size \(64\). Use WithBufferSize to override.
 
 <a name="WebhookServer.ListenAndServe"></a>
-### func \(\*WebhookServer\) [ListenAndServe](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L150>)
+### func \(\*WebhookServer\) [ListenAndServe](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L168>)
 
 ```go
 func (w *WebhookServer) ListenAndServe(ctx context.Context, addr string) error
@@ -203,7 +203,7 @@ func (w *WebhookServer) ListenAndServe(ctx context.Context, addr string) error
 ListenAndServe starts an HTTP server on addr and blocks until Stop is called \(which triggers Shutdown with the caller's context\) or the server returns an error other than http.ErrServerClosed. Callers must invoke Stop\(ctx\) to cleanly shut down the server; the ctx passed here is only used as the server's base context for incoming requests.
 
 <a name="WebhookServer.Run"></a>
-### func \(\*WebhookServer\) [Run](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L71>)
+### func \(\*WebhookServer\) [Run](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L90>)
 
 ```go
 func (w *WebhookServer) Run(ctx context.Context) error
@@ -212,7 +212,7 @@ func (w *WebhookServer) Run(ctx context.Context) error
 Run implements Updater. It blocks until Stop is called or ctx is cancelled. If the server has not been started via ListenAndServe, Run only watches for shutdown — the user is expected to mount ServeHTTP on their own router.
 
 <a name="WebhookServer.ServeHTTP"></a>
-### func \(\*WebhookServer\) [ServeHTTP](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L97>)
+### func \(\*WebhookServer\) [ServeHTTP](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L116>)
 
 ```go
 func (w *WebhookServer) ServeHTTP(rw http.ResponseWriter, r *http.Request)
@@ -221,7 +221,7 @@ func (w *WebhookServer) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 ServeHTTP implements http.Handler. Telegram POSTs each update as JSON to this endpoint. Non\-POST requests get 405; bad bodies get 400; secret token mismatches get 401.
 
 <a name="WebhookServer.Stop"></a>
-### func \(\*WebhookServer\) [Stop](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L83>)
+### func \(\*WebhookServer\) [Stop](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L102>)
 
 ```go
 func (w *WebhookServer) Stop(ctx context.Context) error
@@ -230,7 +230,7 @@ func (w *WebhookServer) Stop(ctx context.Context) error
 Stop implements Updater.
 
 <a name="WebhookServer.Updates"></a>
-### func \(\*WebhookServer\) [Updates](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L65>)
+### func \(\*WebhookServer\) [Updates](<https://github.com/lukaszraczylo/go-telegram/blob/main/transport/webhook.go#L84>)
 
 ```go
 func (w *WebhookServer) Updates() <-chan api.Update

examples/callback/handlers.go

@@ -21,7 +21,7 @@ func handleStart(c *dispatch.Context, m *api.Message) error {
 }
 
 func handleCallback(c *dispatch.Context, q *api.CallbackQuery) error {
-	groups := c.Values["regex_match"].([]string)
+	groups := c.RegexMatch
 	current, _ := strconv.Atoi(groups[1])
 	if groups[2] == "inc" {
 		current++

examples/callback/handlers_test.go

@@ -42,7 +42,7 @@ const (
 func makeCtx(bot *client.Bot, upd *api.Update, extra map[string]any) *dispatch.Context {
 	c := dispatch.NewContext(context.Background(), bot, upd)
 	for k, v := range extra {
-		c.Values[k] = v
+		c.Set(k, v)
 	}
 	return c
 }
@@ -82,7 +82,9 @@ func TestHandleStart_SendsInitialKeyboard(t *testing.T) {
 
 func callbackCtx(bot *client.Bot, q *api.CallbackQuery, groups []string) *dispatch.Context {
 	upd := &api.Update{UpdateID: 1, CallbackQuery: q}
-	return makeCtx(bot, upd, map[string]any{"regex_match": groups})
+	c := makeCtx(bot, upd, nil)
+	c.RegexMatch = groups
+	return c
 }
 
 func callbackQuery(data string, msgID int64, chatID int64) *api.CallbackQuery {

examples/pagination/main.go

@@ -111,8 +111,7 @@ func main() {
 
 	// page:<n> callbacks — edit message in-place.
 	router.OnCallback(`^page:(\d+)$`, func(c *dispatch.Context, q *api.CallbackQuery) error {
-		groups := c.Values["regex_match"].([]string)
-		page, _ := strconv.Atoi(groups[1])
+		page, _ := strconv.Atoi(c.RegexMatch[1])
 
 		// Acknowledge the tap first.
 		_, _ = api.AnswerCallbackQuery(c.Ctx, c.Bot, &api.AnswerCallbackQueryParams{

transport/webhook.go

@@ -6,6 +6,7 @@
 package transport
 
 import (
+	"bytes"
 	"context"
 	"crypto/subtle"
 	"errors"
@@ -18,6 +19,24 @@ import (
 	"github.com/lukaszraczylo/go-telegram/client"
 )
 
+// webhookBufPool reuses *bytes.Buffer for incoming webhook bodies.
+// Webhook payloads are typically a single Telegram Update (commonly
+// 1-8 KiB), so a buffer that has grown once will satisfy most
+// subsequent requests with no additional allocation.
+var webhookBufPool = sync.Pool{New: func() any { return new(bytes.Buffer) }}
+
+// maxWebhookBufCap caps the buffer size returned to webhookBufPool so
+// a rare oversized update doesn't permanently bloat the pool. Buffers
+// larger than this are dropped on the floor.
+const maxWebhookBufCap = 256 * 1024
+
+func putWebhookBuf(buf *bytes.Buffer) {
+	if buf.Cap() > maxWebhookBufCap {
+		return
+	}
+	webhookBufPool.Put(buf)
+}
+
 // WebhookServer implements Updater by exposing an http.Handler that
 // receives updates from Telegram. It can be mounted on the user's own
 // HTTP server (via ServeHTTP) or run standalone (via ListenAndServe).
@@ -108,28 +127,27 @@ func (w *WebhookServer) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 	}
 	w.handlers.Add(1)
 	defer w.handlers.Done()
+
+	const maxBody = 1 << 20 // 1 MiB cap on body
+	r.Body = http.MaxBytesReader(rw, r.Body, maxBody)
 	defer func() { _ = r.Body.Close() }()
 
-	const max = 1 << 20 // 1 MiB cap on body
-	buf := make([]byte, 0, 1024)
-	tmp := make([]byte, 4096)
-	for {
-		n, err := r.Body.Read(tmp)
-		if n > 0 {
-			buf = append(buf, tmp[:n]...)
-			if len(buf) > max {
-				rw.WriteHeader(http.StatusRequestEntityTooLarge)
-				return
-			}
-		}
-		if errors.Is(err, http.ErrBodyReadAfterClose) || err != nil {
-			break
+	buf := webhookBufPool.Get().(*bytes.Buffer)
+	buf.Reset()
+	defer putWebhookBuf(buf)
+	if _, err := buf.ReadFrom(r.Body); err != nil {
+		var maxErr *http.MaxBytesError
+		if errors.As(err, &maxErr) {
+			rw.WriteHeader(http.StatusRequestEntityTooLarge)
+			return
 		}
+		rw.WriteHeader(http.StatusBadRequest)
+		return
 	}
 
 	var u api.Update
 	codec := w.Bot.Codec()
-	if err := codec.Unmarshal(buf, &u); err != nil {
+	if err := codec.Unmarshal(buf.Bytes(), &u); err != nil {
 		rw.WriteHeader(http.StatusBadRequest)
 		return
 	}

transport/webhook_bench_test.go

@@ -0,0 +1,39 @@
+package transport
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/lukaszraczylo/go-telegram/client"
+)
+
+const benchUpdateBody = `{"update_id":12345,"message":{"message_id":1,"date":1700000000,"chat":{"id":42,"type":"private"},"from":{"id":42,"is_bot":false,"first_name":"User"},"text":"hello world"}}`
+
+func BenchmarkWebhook_ServeHTTP(b *testing.B) {
+	w := NewWebhookServer(client.New("t"), WithBufferSize(1024))
+	body := []byte(benchUpdateBody)
+
+	done := make(chan struct{})
+	go func() {
+		for {
+			select {
+			case <-w.Updates():
+			case <-done:
+				return
+			}
+		}
+	}()
+	defer close(done)
+
+	b.ReportAllocs()
+	for b.Loop() {
+		req := httptest.NewRequest(http.MethodPost, "/", bytes.NewReader(body))
+		rec := httptest.NewRecorder()
+		w.ServeHTTP(rec, req)
+		if rec.Code != http.StatusOK {
+			b.Fatalf("status %d", rec.Code)
+		}
+	}
+}