hack

guide/memory-profiler.go

@@ -0,0 +1,38 @@
+// +build ignore
+
+package main
+
+import (
+	"os"
+	"runtime/pprof"
+	"time"
+)
+
+func main() {
+	file, _ := os.Create("./mem.pprof")
+	defer pprof.Lookup("allocs").WriteTo(file, 0)
+
+	go allocSmall()
+	go allocBig()
+
+	time.Sleep(1 * time.Second)
+}
+
+//go:noinline
+func allocSmall() {
+	for i := 0; ; i++ {
+		_ = alloc(32)
+	}
+}
+
+//go:noinline
+func allocBig() {
+	for i := 0; ; i++ {
+		_ = alloc(256)
+	}
+}
+
+//go:noinline
+func alloc(size int) []byte {
+	return make([]byte, size)
+}