bfs：对FileHeader的压缩和解压使用Pool管理

internal/utils/bfs/gzip_reader_pool.go

@@ -0,0 +1,66 @@
+// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package bfs
+
+import (
+	"github.com/TeaOSLab/EdgeNode/internal/utils/percpu"
+	"github.com/klauspost/compress/gzip"
+	"io"
+	"runtime"
+)
+
+var SharedDecompressPool = NewGzipReaderPool()
+
+type GzipReaderPool struct {
+	c     chan *gzip.Reader
+	cList []chan *gzip.Reader
+}
+
+func NewGzipReaderPool() *GzipReaderPool {
+	const poolSize = 16
+
+	var countProcs = runtime.GOMAXPROCS(0)
+	if countProcs <= 0 {
+		countProcs = runtime.NumCPU()
+	}
+	countProcs *= 4
+
+	var cList []chan *gzip.Reader
+	for i := 0; i < countProcs; i++ {
+		cList = append(cList, make(chan *gzip.Reader, poolSize))
+	}
+
+	return &GzipReaderPool{
+		c:     make(chan *gzip.Reader, poolSize),
+		cList: cList,
+	}
+}
+
+func (this *GzipReaderPool) Get(rawReader io.Reader) (*gzip.Reader, error) {
+	select {
+	case w := <-this.getC():
+		err := w.Reset(rawReader)
+		if err != nil {
+			return nil, err
+		}
+		return w, nil
+	default:
+		return gzip.NewReader(rawReader)
+	}
+}
+
+func (this *GzipReaderPool) Put(reader *gzip.Reader) {
+	select {
+	case this.getC() <- reader:
+	default:
+		// 不需要close，因为已经在使用的时候调用了
+	}
+}
+
+func (this *GzipReaderPool) getC() chan *gzip.Reader {
+	var procId = percpu.GetProcId()
+	if procId < len(this.cList) {
+		return this.cList[procId]
+	}
+	return this.c
+}