flyline

Fly multi-producer / multi-consumer channels for Go

A flyline buffer works similar to a standard Go channel with the following features:

• It has a sync method. That means, you can wait for all after close buffer.
• It is lock-free and thread-safe.
• By default, it does not have a cap, you can use send filter to implement it.

Getting Started

Installing

To start using flyline, install Go and run go get:

$ go get github.com/pharosnet/flyline

This will retrieve the library.

Usage

It's easily to use, like standard Go channel.

ArrayBuffer (it's better than go channel)

// buffer.go
package main

import (
	"github.com/pharosnet/flyline"
	"time"
	"context"
)

func main() {
	buf := flyline.NewArrayBuffer(1024*16)
	buf.Send(time.Now())
	value, ok := buf.Recv()
	recvTime := time.Time{}
	flyline.ValueScan(value, &recvTime)
	println(recvTime)
	// close buffer
	buf.Close()
	// change ctx to timeout, if sync with timeout. 
	buf.Sync(context.Background())
}

$ go run buffer.go 

QueueBuffer

// buffer.go
package main

import (
	"github.com/pharosnet/flyline"
	"time"
	"context"
)

func main() {
	buf := flyline.NewQueueBuffer()
	buf.Send(time.Now())
	value, ok := buf.Recv()
	recvTime := time.Time{}
	flyline.ValueScan(value, &recvTime)
	println(recvTime)
	// close buffer
	buf.Close()
	// change ctx to timeout, if sync with timeout. 
	buf.Sync(context.Background())
}

$ go run buffer.go 

Benchmarks

Each of the following benchmark tests sends an incrementing sequence message from one goroutine to another. The receiving goroutine asserts that the message is received is the expected incrementing sequence value. Any failures cause a panic. Unless otherwise noted, all tests were run using GOMAXPROCS=2.

MacBook Pro 13" Retina, Mid 2015

• CPU: Intel Core i5 @ 2.70 Ghz
• Operation System: OS X 10.13.4
• Go Runtime: Go 1.10.0
• Go Architecture: amd64

Scenario	Per Operation Time
Channels: Buffered, Non-blocking, GOMAXPROCS=1	19.7 ns/op
Channels: Buffered, Non-blocking, GOMAXPROCS=2	21.0 ns/op
Channels: Buffered, Non-blocking, GOMAXPROCS=3, Contended Write	110.0 ns/op
ArrayBuffer: Buffered, Non-blocking, GOMAXPROCS=1	11.9 ns/op
ArrayBuffer: Buffered, Non-blocking, GOMAXPROCS=2	7.14 ns/op
ArrayBuffer: Buffered, Non-blocking, GOMAXPROCS=3, Contended Write	11.9 ns/op

Contact

Ryougi Nevermore @ryougi

License

flyline source code is available under the GPL-3 License.