PHP multi-threading and Go coroutines are both effective mechanisms in high-concurrency scenarios. Multi-threading provides powerful management functions, but the overhead is large, while coroutines are very lightweight and have less overhead. In actual combat, PHP multi-threading is suitable for tasks such as concurrent crawlers, while Go coroutines are more suitable for scenarios such as web servers.
Comparison of PHP multi-threading and Go coroutines
Introduction
In high-concurrency scenarios, improving program performance is crucial . The traditional multi-threading mechanism in PHP and the coroutine mechanism of the Go language are both effective means to deal with high concurrency challenges. This article will compare the two mechanisms and provide practical examples to illustrate their key differences.
PHP multi-threading
Principle and syntax
The multi-threading mechanism in PHP is based on POSIX thread creation. Each thread has its own task, stack and execution flow. You can create a thread through the pthread_create()
function and join it to the main thread through the pthread_join()
function.
<?php $thread = new Thread(); $thread->start(function() { echo "Hello from thread!" . PHP_EOL; }); $thread->join(); ?>
Features
- Powerful thread management function that can create, kill and synchronize threads.
- Each thread occupies an independent memory space, which is expensive.
- Inter-thread communication needs to consider locks and race conditions.
Go coroutine
Principle and syntax
Go coroutine is a lightweight execution entity. Compared with threads, coroutines share the same address. Space and stack. Coroutines are created using the go
keyword and executed in the func
function. Coroutines communicate through channels.
package main import "fmt" func main() { go func() { fmt.Println("Hello from goroutine!") // 协程 }() fmt.Println("Hello from main!") // 主程序 }
Features
- Coroutines are very lightweight and have low creation and management costs.
- Coroutines share address space, reducing overhead.
- The built-in channel mechanism simplifies communication between coroutines.
Practical case
PHP multi-threading case: concurrent crawler
<?php class WebCrawlerThread { private $url; public function __construct($url) { $this->url = $url; } public function run() { $content = file_get_contents($this->url); // ... 处理爬取内容 ... } } $threads = []; $urls = ['url1', 'url2', 'url3']; foreach ($urls as $url) { $thread = new WebCrawlerThread($url); $thread->start(); $threads[] = $thread; } foreach ($threads as $thread) { $thread->join(); } ?>
Go coroutine case: Web server
package main import ( "fmt" "log" "net/http" ) func main() { http.HandleFunc("/", handler) log.Fatal(http.ListenAndServe(":8080", nil)) } func handler(w http.ResponseWriter, r *http.Request) { go func() { // 并发地处理请求 fmt.Fprintln(w, "Hello from goroutine!") }() fmt.Fprintln(w, "Hello from main goroutine!") }
Conclusion
PHP multi-threading and Go coroutines are both effective mechanisms for handling high-concurrency scenarios. Multi-threading provides powerful management functions, but the overhead is high. Coroutines are very lightweight, have less overhead, and simplify communication. Practical cases demonstrate the specific application of these two mechanisms in concurrent programming.
The above is the detailed content of Comparison between PHP multithreading and Go coroutines?. For more information, please follow other related articles on the PHP Chinese website!

go语言有缩进。在go语言中,缩进直接使用gofmt工具格式化即可(gofmt使用tab进行缩进);gofmt工具会以标准样式的缩进和垂直对齐方式对源代码进行格式化,甚至必要情况下注释也会重新格式化。

本篇文章带大家了解一下golang 的几种常用的基本数据类型,如整型,浮点型,字符,字符串,布尔型等,并介绍了一些常用的类型转换操作。

闭包(closure)是一个函数以及其捆绑的周边环境状态(lexical environment,词法环境)的引用的组合。 换而言之,闭包让开发者可以从内部函数访问外部函数的作用域。 闭包会随着函数的创建而被同时创建。

go语言叫go的原因:想表达这门语言的运行速度、开发速度、学习速度(develop)都像gopher一样快。gopher是一种生活在加拿大的小动物,go的吉祥物就是这个小动物,它的中文名叫做囊地鼠,它们最大的特点就是挖洞速度特别快,当然可能不止是挖洞啦。

是,TiDB采用go语言编写。TiDB是一个分布式NewSQL数据库;它支持水平弹性扩展、ACID事务、标准SQL、MySQL语法和MySQL协议,具有数据强一致的高可用特性。TiDB架构中的PD储存了集群的元信息,如key在哪个TiKV节点;PD还负责集群的负载均衡以及数据分片等。PD通过内嵌etcd来支持数据分布和容错;PD采用go语言编写。

在写 Go 的过程中经常对比这两种语言的特性,踩了不少坑,也发现了不少有意思的地方,下面本篇就来聊聊 Go 自带的 HttpClient 的超时机制,希望对大家有所帮助。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

SublimeText3 Mac version
God-level code editing software (SublimeText3)

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver CS6
Visual web development tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
