优化内容压缩

* 取消用户设置的压缩级别，现在压缩级别通过系统自动设置
* Pool中的对象命中100万次时自动销毁，避免内存泄漏
* 降低Pool中的对象数量，避免占用太多内存
* 根据系统CPU线程数自动计算压缩级别，避免消耗太多CPU
* zstd限制解码的最大Window
* zstd使用低内存模式

internal/compressions/reader.go

@@ -9,6 +9,7 @@ type Reader interface {
 	Reset(reader io.Reader) error
 	RawClose() error
 	Close() error
+	IncreaseHit() uint32
 
 	SetPool(pool *ReaderPool)
 	ResetFinish()

internal/compressions/reader_base.go

@@ -2,10 +2,13 @@
 
 package compressions
 
+import "sync/atomic"
+
 type BaseReader struct {
 	pool *ReaderPool
 
 	isFinished bool
+	hits       uint32
 }
 
 func (this *BaseReader) SetPool(pool *ReaderPool) {
@@ -13,8 +16,11 @@ func (this *BaseReader) SetPool(pool *ReaderPool) {
 }
 
 func (this *BaseReader) Finish(obj Reader) error {
+	if this.isFinished {
+		return nil
+	}
 	err := obj.RawClose()
-	if err == nil && this.pool != nil && !this.isFinished {
+	if err == nil && this.pool != nil {
 		this.pool.Put(obj)
 	}
 	this.isFinished = true
@@ -24,3 +30,7 @@ func (this *BaseReader) Finish(obj Reader) error {
 func (this *BaseReader) ResetFinish() {
 	this.isFinished = false
 }
+
+func (this *BaseReader) IncreaseHit() uint32 {
+	return atomic.AddUint32(&this.hits, 1)
+}

internal/compressions/reader_pool.go

@@ -6,6 +6,8 @@ import (
 	"io"
 )
 
+const maxReadHits = 1 << 20
+
 type ReaderPool struct {
 	c       chan Reader
 	newFunc func(reader io.Reader) (Reader, error)
@@ -49,6 +51,11 @@ func (this *ReaderPool) Get(parentReader io.Reader) (Reader, error) {
 }
 
 func (this *ReaderPool) Put(reader Reader) {
+	if reader.IncreaseHit() > maxReadHits {
+		// do nothing to discard it
+		return
+	}
+
 	select {
 	case this.c <- reader:
 	default:

internal/compressions/reader_pool_brotli.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -15,11 +14,8 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedBrotliReaderPool = NewReaderPool(maxSize, func(reader io.Reader) (Reader, error) {
+
+	sharedBrotliReaderPool = NewReaderPool(CalculatePoolSize(), func(reader io.Reader) (Reader, error) {
 		return newBrotliReader(reader)
 	})
 }

internal/compressions/reader_pool_deflate.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -15,11 +14,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedDeflateReaderPool = NewReaderPool(maxSize, func(reader io.Reader) (Reader, error) {
+	sharedDeflateReaderPool = NewReaderPool(CalculatePoolSize(), func(reader io.Reader) (Reader, error) {
 		return newDeflateReader(reader)
 	})
 }

internal/compressions/reader_pool_gzip.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -15,11 +14,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedGzipReaderPool = NewReaderPool(maxSize, func(reader io.Reader) (Reader, error) {
+	sharedGzipReaderPool = NewReaderPool(CalculatePoolSize(), func(reader io.Reader) (Reader, error) {
 		return newGzipReader(reader)
 	})
 }

internal/compressions/reader_pool_zstd.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -15,11 +14,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedZSTDReaderPool = NewReaderPool(maxSize, func(reader io.Reader) (Reader, error) {
+	sharedZSTDReaderPool = NewReaderPool(CalculatePoolSize(), func(reader io.Reader) (Reader, error) {
 		return newZSTDReader(reader)
 	})
 }

internal/compressions/reader_zstd.go

@@ -18,7 +18,7 @@ func NewZSTDReader(reader io.Reader) (Reader, error) {
 }
 
 func newZSTDReader(reader io.Reader) (Reader, error) {
-	r, err := zstd.NewReader(reader)
+	r, err := zstd.NewReader(reader, zstd.WithDecoderMaxWindow(256<<20))
 	if err != nil {
 		return nil, err
 	}

internal/compressions/utils.go

@@ -5,8 +5,10 @@ package compressions
 import (
 	"errors"
 	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
+	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 	"net/http"
+	"runtime"
 )
 
 type ContentEncoding = string
@@ -88,3 +90,31 @@ func WrapHTTPResponse(resp *http.Response) {
 	resp.Header.Del("Content-Length")
 	resp.Body = reader
 }
+
+// 系统CPU线程数
+var countCPU = runtime.NumCPU()
+
+// GenerateCompressLevel 根据系统资源自动生成压缩级别
+func GenerateCompressLevel(minLevel int, maxLevel int) (level int) {
+	if countCPU < 16 {
+		return minLevel
+	}
+
+	if countCPU < 32 {
+		return min(3, maxLevel)
+	}
+
+	return min(5, maxLevel)
+}
+
+// CalculatePoolSize 计算Pool尺寸
+func CalculatePoolSize() int {
+	var maxSize = memutils.SystemMemoryGB() * 64
+	if maxSize == 0 {
+		maxSize = 128
+	}
+	if maxSize > 4096 {
+		maxSize = 4096
+	}
+	return maxSize
+}

internal/compressions/utils_test.go

@@ -0,0 +1,27 @@
+// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package compressions_test
+
+import (
+	"github.com/TeaOSLab/EdgeNode/internal/compressions"
+	"github.com/iwind/TeaGo/assert"
+	"testing"
+)
+
+func TestGenerateCompressLevel(t *testing.T) {
+	var a = assert.NewAssertion(t)
+
+	t.Log(compressions.GenerateCompressLevel(0, 10))
+	t.Log(compressions.GenerateCompressLevel(1, 10))
+	t.Log(compressions.GenerateCompressLevel(1, 4))
+
+	{
+		var level = compressions.GenerateCompressLevel(1, 2)
+		t.Log(level)
+		a.IsTrue(level >= 1 && level <= 2)
+	}
+}
+
+func TestCalculatePoolSize(t *testing.T) {
+	t.Log(compressions.CalculatePoolSize())
+}

internal/compressions/writer.go

@@ -11,6 +11,7 @@ type Writer interface {
 	RawClose() error
 	Close() error
 	Level() int
+	IncreaseHit() uint32
 
 	SetPool(pool *WriterPool)
 	ResetFinish()

internal/compressions/writer_base.go

@@ -2,10 +2,16 @@
 
 package compressions
 
+import (
+	"sync/atomic"
+)
+
 type BaseWriter struct {
 	pool *WriterPool
 
 	isFinished bool
+
+	hits uint32
 }
 
 func (this *BaseWriter) SetPool(pool *WriterPool) {
@@ -13,8 +19,11 @@ func (this *BaseWriter) SetPool(pool *WriterPool) {
 }
 
 func (this *BaseWriter) Finish(obj Writer) error {
+	if this.isFinished {
+		return nil
+	}
 	err := obj.RawClose()
-	if err == nil && this.pool != nil && !this.isFinished {
+	if err == nil && this.pool != nil {
 		this.pool.Put(obj)
 	}
 	this.isFinished = true
@@ -24,3 +33,7 @@ func (this *BaseWriter) Finish(obj Writer) error {
 func (this *BaseWriter) ResetFinish() {
 	this.isFinished = false
 }
+
+func (this *BaseWriter) IncreaseHit() uint32 {
+	return atomic.AddUint32(&this.hits, 1)
+}

internal/compressions/writer_brotli.go

@@ -19,12 +19,8 @@ func NewBrotliWriter(writer io.Writer, level int) (Writer, error) {
 	return sharedBrotliWriterPool.Get(writer, level)
 }
 
-func newBrotliWriter(writer io.Writer, level int) (*BrotliWriter, error) {
-	if level <= 0 {
-		level = brotli.BestSpeed
-	} else if level > brotli.BestCompression {
-		level = brotli.BestCompression
-	}
+func newBrotliWriter(writer io.Writer) (*BrotliWriter, error) {
+	var level = GenerateCompressLevel(brotli.BestSpeed, brotli.BestCompression)
 	return &BrotliWriter{
 		writer: brotli.NewWriterOptions(writer, brotli.WriterOptions{
 			Quality: level,

internal/compressions/writer_deflate.go

@@ -18,12 +18,8 @@ func NewDeflateWriter(writer io.Writer, level int) (Writer, error) {
 	return sharedDeflateWriterPool.Get(writer, level)
 }
 
-func newDeflateWriter(writer io.Writer, level int) (Writer, error) {
-	if level <= 0 {
-		level = flate.BestSpeed
-	} else if level > flate.BestCompression {
-		level = flate.BestCompression
-	}
+func newDeflateWriter(writer io.Writer) (Writer, error) {
+	var level = GenerateCompressLevel(flate.BestSpeed, flate.BestCompression)
 
 	flateWriter, err := flate.NewWriter(writer, level)
 	if err != nil {

internal/compressions/writer_gzip.go

@@ -18,12 +18,8 @@ func NewGzipWriter(writer io.Writer, level int) (Writer, error) {
 	return sharedGzipWriterPool.Get(writer, level)
 }
 
-func newGzipWriter(writer io.Writer, level int) (Writer, error) {
-	if level <= 0 {
-		level = gzip.BestSpeed
-	} else if level > gzip.BestCompression {
-		level = gzip.BestCompression
-	}
+func newGzipWriter(writer io.Writer) (Writer, error) {
+	var level = GenerateCompressLevel(gzip.BestSpeed, gzip.BestCompression)
 
 	gzipWriter, err := gzip.NewWriterLevel(writer, level)
 	if err != nil {

internal/compressions/writer_pool.go

@@ -6,6 +6,8 @@ import (
 	"io"
 )
 
+const maxWriterHits = 1 << 20
+
 type WriterPool struct {
 	m       map[int]chan Writer // level => chan Writer
 	newFunc func(writer io.Writer, level int) (Writer, error)
@@ -49,6 +51,11 @@ func (this *WriterPool) Get(parentWriter io.Writer, level int) (Writer, error) {
 }
 
 func (this *WriterPool) Put(writer Writer) {
+	if writer.IncreaseHit() > maxWriterHits {
+		// do nothing to discard it
+		return
+	}
+
 	var level = writer.Level()
 	c, ok := this.m[level]
 	if !ok {

internal/compressions/writer_pool_brotli.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"github.com/andybalholm/brotli"
 	"io"
 )
@@ -16,11 +15,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedBrotliWriterPool = NewWriterPool(maxSize, brotli.BestCompression, func(writer io.Writer, level int) (Writer, error) {
-		return newBrotliWriter(writer, level)
+	sharedBrotliWriterPool = NewWriterPool(CalculatePoolSize(), brotli.BestCompression, func(writer io.Writer, level int) (Writer, error) {
+		return newBrotliWriter(writer)
 	})
 }

internal/compressions/writer_pool_deflate.go

@@ -5,7 +5,6 @@ package compressions
 import (
 	"compress/flate"
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -16,11 +15,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedDeflateWriterPool = NewWriterPool(maxSize, flate.BestCompression, func(writer io.Writer, level int) (Writer, error) {
-		return newDeflateWriter(writer, level)
+	sharedDeflateWriterPool = NewWriterPool(CalculatePoolSize(), flate.BestCompression, func(writer io.Writer, level int) (Writer, error) {
+		return newDeflateWriter(writer)
 	})
 }

internal/compressions/writer_pool_gzip.go

@@ -5,7 +5,6 @@ package compressions
 import (
 	"compress/gzip"
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"io"
 )
 
@@ -16,11 +15,8 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedGzipWriterPool = NewWriterPool(maxSize, gzip.BestCompression, func(writer io.Writer, level int) (Writer, error) {
-		return newGzipWriter(writer, level)
+
+	sharedGzipWriterPool = NewWriterPool(CalculatePoolSize(), gzip.BestCompression, func(writer io.Writer, level int) (Writer, error) {
+		return newGzipWriter(writer)
 	})
 }

internal/compressions/writer_pool_zstd.go

@@ -4,7 +4,6 @@ package compressions
 
 import (
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
-	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	"github.com/klauspost/compress/zstd"
 	"io"
 )
@@ -16,11 +15,7 @@ func init() {
 		return
 	}
 
-	var maxSize = memutils.SystemMemoryGB() * 256
-	if maxSize == 0 {
-		maxSize = 256
-	}
-	sharedZSTDWriterPool = NewWriterPool(maxSize, int(zstd.SpeedBestCompression), func(writer io.Writer, level int) (Writer, error) {
-		return newZSTDWriter(writer, level)
+	sharedZSTDWriterPool = NewWriterPool(CalculatePoolSize(), int(zstd.SpeedBestCompression), func(writer io.Writer, level int) (Writer, error) {
+		return newZSTDWriter(writer)
 	})
 }

internal/compressions/writer_zstd.go

@@ -18,21 +18,18 @@ func NewZSTDWriter(writer io.Writer, level int) (Writer, error) {
 	return sharedZSTDWriterPool.Get(writer, level)
 }
 
-func newZSTDWriter(writer io.Writer, level int) (Writer, error) {
-	if level < 0 {
-		level = 0
-	}
+func newZSTDWriter(writer io.Writer) (Writer, error) {
+	var level = 1
+	var zstdLevel = zstd.SpeedFastest
 
-	var zstdLevel = zstd.EncoderLevelFromZstd(level)
-
-	zstdWriter, err := zstd.NewWriter(writer, zstd.WithEncoderLevel(zstdLevel))
+	zstdWriter, err := zstd.NewWriter(writer, zstd.WithEncoderLevel(zstdLevel), zstd.WithWindowSize(16<<10), zstd.WithLowerEncoderMem(true))
 	if err != nil {
 		return nil, err
 	}
 
 	return &ZSTDWriter{
-		writer: zstdWriter,
-		level:  level,
+		writer:    zstdWriter,
+		level:     level,
 	}, nil
 }