Does golang need a thread pool?

Golang does not need to use thread pools explicitly like other languages ​​because it has its own lightweight coroutines and schedulers. Although Golang does not need thread pools, using thread pools can improve the performance of the application. Performance and throughput, when dealing with a large number of short-lived and frequent tasks, a fixed-size pool can be created to reuse resources and avoid unnecessary creation and destruction overhead.

Operating system for this tutorial: Windows 10 system, Go1.20.1 version, Dell G3 computer.

Golang does not need to use thread pools explicitly like other languages ​​because it has its own lightweight coroutines (goroutines) and scheduler (scheduler).

In Golang, thousands of coroutines can be started at the same time, because each coroutine consumes only a small amount of memory, and switching between them is also very fast due to the use of a scheduler. This means you can easily implement highly concurrent applications by writing concurrent code without paying too much attention to the underlying details.

Although Golang does not require a thread pool, using a pool can improve application performance and throughput. When dealing with a large number of short-lived and frequent tasks, you can create a fixed-size pool to reuse resources and avoid unnecessary creation and destruction overhead.

Under high load conditions, if concurrent operations are not properly limited, system resources may be exhausted in some links, so you can use the built-in go concurrency library function. For example, sync.WaitGroup can be applied in db query to realize data query io reuse

The following is a basic example:

package main
import (
    "fmt"
    "sync"
)
func main() {
    var wg sync.WaitGroup
    for i := 0; i < 10; i++ {
        wg.Add(1)
        go func(i int) {
            fmt.Println("executing task", i)
            // 在这里处理goroutine阻塞或耗时较长的任务
            wg.Done()
        }(i)
    }
    wg.Wait()
}

In this example, sync.WaitGroup is used to group and coordinate our goroutines Work and wait for them to finish executing. Since the only delay comes from starting the goroutine, there is no need to worry about excessive thread creation. All in all, because Golang maintains an efficient scheduler, there is usually no need to implement functions like thread pools yourself.

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