Swoole 6.2 Make PHP great again: iouring replaces epoll, asynchronous IO performance soars to 3 times that of Golang and 4.4 times that of Node.js!

Chimin

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Jan 27, 2026

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In the field of high-performance server development, every millisecond of latency optimization and every reduction in system calls can bring a qualitative leap. Today, we welcome a milestone breakthrough — Swoole 6.2 officially introduces io_uring technology, fully replacing the traditional epoll to implement asynchronous IO.

Test results show:

• 💥 Swoole + io_uring achieves a QPS of 146,872!
• 🚀 3.06 times that of Golang HTTP Server
• 🌪️ 4.44 times that of Node.js
• ⬇️ Average latency drops from 2.81ms to 1.36ms, with performance improvement exceeding 100%

This is not just a simple performance optimization, but a “nuclear weapon”-level evolution for PHP in the high-concurrency service field.

📊 Test Environment and Comparison Benchmarks

To ensure fairness, all services run on the same physical machine and are limited to single-core CPU execution (to avoid multi-threading interference):

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Test Description

• ✅ Golang net/http (GOMAXPROCS=1)