pool

Documentation

Index

• Constants
• func Get(size int) []byte
• func GetBuffer() *bytes.Buffer
• func Put(buf []byte) error
• func PutBuffer(buf *bytes.Buffer)
• type Allocator
  • func NewAllocator() *Allocator
  • func (alloc *Allocator) Get(size int) []byte
  • func (alloc *Allocator) Put(buf []byte) error

Constants

const (
	// io.Copy default buffer size is 32 KiB
	// but the maximum packet size of vmess/shadowsocks is about 16 KiB
	// so define a buffer of 20 KiB to reduce the memory of each TCP relay
	RelayBufferSize = 20 * 1024

	// RelayBufferSize uses 20KiB, but due to the allocator it will actually
	// request 32Kib. Most UDPs are smaller than the MTU, and the TUN's MTU
	// set to 9000, so the UDP Buffer size set to 16Kib
	UDPBufferSize = 16 * 1024
)

Functions

func Get

func Get(size int) []byte

func GetBuffer

func GetBuffer() *bytes.Buffer

func Put

func Put(buf []byte) error

func PutBuffer

func PutBuffer(buf *bytes.Buffer)

Types

type Allocator

type Allocator struct {
	// contains filtered or unexported fields
}

Allocator for incoming frames, optimized to prevent overwriting after zeroing

func NewAllocator

func NewAllocator() *Allocator

NewAllocator initiates a []byte allocator for frames less than 65536 bytes, the waste(memory fragmentation) of space allocation is guaranteed to be no more than 50%.

func (*Allocator) Get

func (alloc *Allocator) Get(size int) []byte

Get a []byte from pool with most appropriate cap

func (*Allocator) Put

func (alloc *Allocator) Put(buf []byte) error

Put returns a []byte to pool for future use, which the cap must be exactly 2^n