feat: add cgo benchmark

benchmark/microbench/cgo/benchmark.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+gcc -shared -o libsum.so -fPIC sum.c
+go test -bench=.
+rm libsum.so

benchmark/microbench/cgo/cgo.go

@@ -0,0 +1,12 @@
+package cgo
+
+/*
+#cgo LDFLAGS: -L. -lsum
+#include <stdint.h>
+int64_t sum(int64_t n);
+*/
+import "C"
+
+func cgosum(n int64) int64 {
+	return int64(C.sum(C.int64_t(n)))
+}

benchmark/microbench/cgo/cgo_benchmark_test.go

@@ -0,0 +1,44 @@
+package cgo
+
+import (
+	"testing"
+
+	"github.com/ebitengine/purego"
+)
+
+func sum(n int64) int64 {
+	var result int64
+	result = 0
+	for i := int64(0); i < n; i++ {
+		result += i
+	}
+	return result
+}
+
+func BenchmarkGoSum(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = sum(100)
+	}
+}
+
+func BenchmarkCgoSum(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = cgosum(100)
+	}
+}
+
+func BenchmarkPuregoSum(b *testing.B) {
+	libc, err := purego.Dlopen("./libsum.so", purego.RTLD_NOW|purego.RTLD_GLOBAL)
+	if err != nil {
+		panic("shouldn't failed here")
+	}
+	defer purego.Dlclose(libc)
+	var puregosum func(int64) int64
+	purego.RegisterLibFunc(&puregosum, libc, "sum")
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		_ = puregosum(100)
+	}
+}

benchmark/microbench/cgo/sum.c

@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+int64_t sum(int64_t n) {
+    int64_t result = 0;
+    for (int64_t i = 0; i < n; i++) {
+        result += i;
+    }
+    return result;
+}

go.mod

@@ -4,6 +4,7 @@ go 1.22.0
 
 require (
 	github.com/cloudwego/netpoll v0.6.2
+	github.com/ebitengine/purego v0.7.1
 	github.com/google/uuid v1.6.0
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.7.0

go.sum

@@ -5,6 +5,8 @@ github.com/cloudwego/netpoll v0.6.2/go.mod h1:kaqvfZ70qd4T2WtIIpCOi5Cxyob8viEpzL
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/ebitengine/purego v0.7.1 h1:6/55d26lG3o9VCZX8lping+bZcmShseiqlh2bnUDiPA=
+github.com/ebitengine/purego v0.7.1/go.mod h1:ah1In8AOtksoNK6yk5z1HTJeUkC1Ez4Wk2idgGslMwQ=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=