add sync pool for bufio reader

Signed-off-by: Yakir Oren <yakiroren@gmail.com>

Author: YakirOren

go.mod

@@ -367,7 +367,6 @@ require (
 	github.com/spf13/cobra v1.10.2 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/spiffe/go-spiffe/v2 v2.6.0 // indirect
-	github.com/stoewer/go-strcase v1.3.0 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/stripe/stripe-go/v74 v74.30.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
@@ -458,4 +457,4 @@ require (
 	zombiezen.com/go/sqlite v1.4.0 // indirect
 )
 
-replace github.com/inspektor-gadget/inspektor-gadget => github.com/matthyx/inspektor-gadget v0.0.0-20260226175242-c524fbad47d9
+replace github.com/inspektor-gadget/inspektor-gadget => github.com/matthyx/inspektor-gadget v0.0.0-20260228200201-44f8fa846146

go.sum

@@ -1,5 +1,3 @@
-cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
-cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
 cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
 cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
@@ -743,8 +741,6 @@ github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYU
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
 github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
-github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
 github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
 github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
 github.com/apache/arrow/go/v10 v10.0.1/go.mod h1:YvhnlEePVnBS4+0z3fhPfUy7W1Ikj0Ih0vcRo/gZ1M0=
@@ -1237,8 +1233,6 @@ github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Z
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.1.3 h1:CVpQJjYgC4VbzxeGVHfvZrv1ctoYCAI8vbl07Fcxlyg=
 github.com/google/btree v1.1.3/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
-github.com/google/cel-go v0.26.1 h1:iPbVVEdkhTX++hpe3lzSk7D3G3QSYqLGoHOcEio+UXQ=
-github.com/google/cel-go v0.26.1/go.mod h1:A9O8OU9rdvrK5MQyrqfIxo1a0u4g3sF8KB6PUIaryMM=
 github.com/google/cel-go v0.27.0 h1:e7ih85+4qVrBuqQWTW4FKSqZYokVuc3HnhH5keboFTo=
 github.com/google/cel-go v0.27.0/go.mod h1:tTJ11FWqnhw5KKpnWpvW9CJC3Y9GK4EIS0WXnBbebzw=
 github.com/google/flatbuffers v2.0.8+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
@@ -1538,6 +1532,7 @@ github.com/mailru/easyjson v0.9.0 h1:PrnmzHw7262yW8sTBwxi1PdJA3Iw/EKBa8psRf7d9a4
 github.com/mailru/easyjson v0.9.0/go.mod h1:1+xMtQp2MRNVL/V1bOzuP3aP8VNwRW55fQUto+XFtTU=
 github.com/matthyx/inspektor-gadget v0.0.0-20260226175242-c524fbad47d9 h1:5SElOPiaA2SKDGnLiWqocww+YagkLL9FPBBeMzKNTIg=
 github.com/matthyx/inspektor-gadget v0.0.0-20260226175242-c524fbad47d9/go.mod h1:V4TgEmWo37K72pQvC7XuRQssysrxIIkrNX4TtEkgiE0=
+github.com/matthyx/inspektor-gadget v0.0.0-20260228200201-44f8fa846146/go.mod h1:V4TgEmWo37K72pQvC7XuRQssysrxIIkrNX4TtEkgiE0=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
@@ -1907,8 +1902,6 @@ github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
 github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjbTCAY=
 github.com/spiffe/go-spiffe/v2 v2.6.0 h1:l+DolpxNWYgruGQVV0xsfeya3CsC7m8iBzDnMpsbLuo=
 github.com/spiffe/go-spiffe/v2 v2.6.0/go.mod h1:gm2SeUoMZEtpnzPNs2Csc0D/gX33k1xIx7lEzqblHEs=
-github.com/stoewer/go-strcase v1.3.0 h1:g0eASXYtp+yvN9fK8sH94oCIk0fau9uV1/ZdJ0AVEzs=
-github.com/stoewer/go-strcase v1.3.0/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=

pkg/containerwatcher/v2/tracers/httpparse.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/http/httputil"
 	"strconv"
+	"sync"
 	"time"
 
 	eventtypes "github.com/inspektor-gadget/inspektor-gadget/pkg/types"
@@ -29,6 +30,12 @@ var readSyscalls = map[string]bool{
 	"recvmsg":  true,
 }
 
+var bufReaderPool = sync.Pool{
+	New: func() any {
+		return bufio.NewReaderSize(nil, 4096)
+	},
+}
+
 var ConsistentHeaders = []string{
 	"Accept-Encoding",
 	"Accept-Language",
@@ -92,8 +99,10 @@ func ParseHttpRequest(data []byte) (*http.Request, error) {
 	}
 
 	// Parse headers only
-	bufReader := bufio.NewReader(bytes.NewReader(data[:headerEnd]))
-	req, err := http.ReadRequest(bufReader)
+	br := bufReaderPool.Get().(*bufio.Reader)
+	br.Reset(bytes.NewReader(data[:headerEnd]))
+	req, err := http.ReadRequest(br)
+	bufReaderPool.Put(br)
 	if err != nil {
 		return fallbackReadRequest(data)
 	}
@@ -136,8 +145,10 @@ func ParseHttpResponse(data []byte, req *http.Request) (*http.Response, error) {
 	}
 
 	// Parse headers only
-	bufReader := bufio.NewReader(bytes.NewReader(data[:headerEnd]))
-	resp, err := http.ReadResponse(bufReader, req)
+	br := bufReaderPool.Get().(*bufio.Reader)
+	br.Reset(bytes.NewReader(data[:headerEnd]))
+	resp, err := http.ReadResponse(br, req)
+	bufReaderPool.Put(br)
 	if err != nil {
 		return fallbackReadResponse(data, req)
 	}