Add byte slice pool

bspool.go

@@ -0,0 +1,13 @@
+package main
+
+import "sync"
+
+var bsPool = sync.Pool{New: func() interface{} { return make([]byte, 0, 128*1024) }}
+
+func getByteSlice() []byte {
+	return bsPool.Get().([]byte)
+}
+
+func putByteSlice(bs []byte) {
+	bsPool.Put(bs)
+}

file.go

@@ -48,7 +48,8 @@ func analyzeFile(filename string, language *Language) *ClocFile {
 	isFirstLine := true
 	isInComments := false
 	isInCommentsSame := false
-	buf := make([]byte, 0, 128*1024)
+	buf := getByteSlice()
+	defer putByteSlice(buf)
 	scanner := bufio.NewScanner(fp)
 	scanner.Buffer(buf, 1024*1024)
 	for scanner.Scan() {