Evaluation of function performance in different pipeline communication modes in golang

The impact of pipeline communication mode on the performance of Go language functions: Unbuffered pipes have the worst performance because they block the sender. Buffered pipes eliminate sender blocking and perform significantly better than unbuffered pipes. Pipe selection performs best and allows data to be received efficiently from multiple pipes.

Evaluation of function performance of different pipeline communication modes in Go language

Introduction

Pipeline is a powerful concurrency primitive in Go language. They allow safe and efficient data transfer between concurrent functions. However, different pipeline communication modes can have a significant impact on function performance. This article will evaluate three common pipe communication patterns and provide a practical example to illustrate their differences.

Communication Modes

We evaluated the following three pipe communication modes:

• Unbuffered pipes: This This type of pipe blocks the sender before sending data.
• Buffered Pipes: This type of pipe allows data to be buffered before the pipe reaches capacity.
• Pipeline selection: A special pipe structure that can receive data from multiple pipes at the same time.

Practical case

To evaluate these communication patterns, we created a simple send-receive function test. This function pipes a random array to another function in the same address space, which is responsible for printing this array. We repeated the tests using different pipeline types and recorded the execution time of each test.

Results

Our experimental results show:

• Unbuffered pipe: Since it causes the sender to block , and therefore has the worst performance.
• Buffered pipes: Performance is significantly better than unbuffered pipes because it eliminates sender blocking. Buffer size has little impact on performance.
• Pipe selection: Highest performance as it allows efficient reception of data from multiple pipes.

Code Example

The following code demonstrates the implementation of the buffered pipe communication mode:

import (
    "fmt"
    "sync"
)

func main() {
    var wg sync.WaitGroup
    ch := make(chan int, 10) // 缓冲区大小为 10

    // 发送函数
    wg.Add(1)
    go func() {
        defer wg.Done()
        for i := 0; i < 100000; i++ {
            ch <- i
        }
        close(ch)
    }()

    // 接收函数
    wg.Add(1)
    go func() {
        defer wg.Done()
        for {
            v, ok := <-ch
            if !ok {
                return
            }
            fmt.Println(v)
        }
    }()

    wg.Wait()
}

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