Added benchmarks for bytes.Buffer vs ByteBuffer comparison

bytebuffer_timing_test.go

@@ -0,0 +1,32 @@
+package fasthttp
+
+import (
+	"bytes"
+	"testing"
+)
+
+func BenchmarkByteBufferWrite(b *testing.B) {
+	s := []byte("foobarbaz")
+	b.RunParallel(func(pb *testing.PB) {
+		var buf ByteBuffer
+		for pb.Next() {
+			for i := 0; i < 100; i++ {
+				buf.Write(s)
+			}
+			buf.Reset()
+		}
+	})
+}
+
+func BenchmarkBytesBufferWrite(b *testing.B) {
+	s := []byte("foobarbaz")
+	b.RunParallel(func(pb *testing.PB) {
+		var buf bytes.Buffer
+		for pb.Next() {
+			for i := 0; i < 100; i++ {
+				buf.Write(s)
+			}
+			buf.Reset()
+		}
+	})
+}