企业🤖AI智能体构建引擎,智能编排和调试,一键部署,支持私有化部署方案 广告
# 协程内存开销 新版本`4.0`使用了`C`栈+`PHP`栈的协程实现方案。`Server`程序每次请求的事件回调函数中会创建一个新协程,处理完成后协程退出。 在协程创建时需要创建一个全新的内存段作为`C`和`PHP`的栈,底层默认分配`2M(C)`虚拟内存+`8K(PHP)`内存(`PHP-7.2`或更高版本)。实际并不会分配这么内存,系统会根据在内存实际读写时发生缺页中断,再分配实际内存。 > 由于`PHP-7.1/7.0`未提供设置栈内存尺寸的接口,这些版本每个协程将申请`256K`的`PHP`内存 相比于异步回调程序,协程会增加一些内存管理的开销。有一定性能损耗。经过压测`QPS`依然可以达到较高的水平。 ```shell ab -c 100 -n 500000 -k http://127.0.0.1:9501/ This is ApacheBench, Version 2.3 <$Revision: 1706008 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 127.0.0.1 (be patient) Completed 50000 requests Completed 100000 requests Completed 150000 requests Completed 200000 requests Completed 250000 requests Completed 300000 requests Completed 350000 requests Completed 400000 requests Completed 450000 requests Completed 500000 requests Finished 500000 requests Server Software: swoole-http-server Server Hostname: 127.0.0.1 Server Port: 9501 Document Path: / Document Length: 24 bytes Concurrency Level: 100 Time taken for tests: 3.528 seconds Complete requests: 500000 Failed requests: 0 Keep-Alive requests: 500000 Total transferred: 132500000 bytes HTML transferred: 12000000 bytes Requests per second: 141738.54 [#/sec] (mean) Time per request: 0.706 [ms] (mean) Time per request: 0.007 [ms] (mean, across all concurrent requests) Transfer rate: 36680.38 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.0 0 2 Processing: 0 1 0.9 0 7 Waiting: 0 1 0.9 0 7 Total: 0 1 0.9 0 7 WARNING: The median and mean for the processing time are not within a normal deviation These results are probably not that reliable. WARNING: The median and mean for the waiting time are not within a normal deviation These results are probably not that reliable. WARNING: The median and mean for the total time are not within a normal deviation These results are probably not that reliable. Percentage of the requests served within a certain time (ms) 50% 0 66% 0 75% 2 80% 2 90% 2 95% 3 98% 3 99% 3 100% 7 (longest request) ```