php7 怎么比 Java 还快？

有点反认知，分别用 PHP 与 Java Spring Boot 写了个返回 1 个像素点图片的接口，结果 php 比 java 快。

代码

PHP 代码

<?php //xpng.php header("Content-type: image/png"); echo base64_decode("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4////fwAJ+wP9CNHoHgAAAABJRU5ErkJggg=="); 

Java 代码

//XController.java package com.abtest; import java.util.Base64; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class XController { @RequestMapping("/x.png") public ResponseEntity<byte[]> xpng() { String onepointpngBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4////fwAJ+wP9CNHoHgAAAABJRU5ErkJggg=="; HttpHeaders respOnseHeaders= new HttpHeaders(); responseHeaders.set("Content-type", "image/png"); byte[] decodedValue = Base64.getDecoder().decode(onepointpngBase64); return new ResponseEntity<byte[]>(decodedValue, responseHeaders, HttpStatus.OK); } } 

开始测试

Server 分别 SpringBoot Jar 包自带的 Apache Tomcat/9.0.24

PHP 就是 PHP 7.0.33-0+deb9u1 (cli) 自带的低性能调试用 server （使用php -S localhost:7767 -t .运行）

AB 结果反直觉，PHP 居然比 Java 快

PHP 结果耗时 0.125 秒

$ ab -n 1000 -c 1000 "http://localhost:7767/xpng.php" This is ApacheBench, Version 2.3 <$Revision: 1757674 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Competed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Server Hostname: localhost Server Port: 7767 Document Path: /xpng.php Document Length: 70 bytes Concurrency Level: 1000 Time taken for tests: 0.125 seconds Complete requests: 1000 Failed requests: 0 Total transferred: 190000 bytes HTML transferred: 70000 bytes Requests per second: 8011.99 [#/sec] (mean) Time per request: 124.813 [ms] (mean) Time per request: 0.125 [ms] (mean, across all concurrent requests) Transfer rate: 1486.60 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 6 5.5 8 14 Processing: 5 22 20.1 13 69 Waiting: 4 22 20.2 12 69 Total: 8 29 21.3 19 71 Percentage of the requests served within a certain time (ms) 50% 19 66% 24 75% 37 80% 62 90% 68 95% 70 98% 70 99% 70 100% 71 (longest request) 

Java 结果耗时 0.498 秒

$ ab -n 1000 -c 1000 "http://localhost:8080/x.png" This is ApacheBench, Version 2.3 <$Revision: 1757674 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking localhost (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Server Hostname: localhost Server Port: 8080 Document Path: /x.png Document Length: 70 bytes Concurrency Level: 1000 Time taken for tests: 0.498 seconds Complete requests: 1000 Failed requests: 0 Total transferred: 188000 bytes HTML transferred: 70000 bytes Requests per second: 2007.85 [#/sec] (mean) Time per request: 498.046 [ms] (mean) Time per request: 0.498 [ms] (mean, across all concurrent requests) Transfer rate: 368.63 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 1 3.2 0 11 Processing: 5 73 63.3 48 237 Waiting: 3 64 56.7 41 194 Total: 5 74 66.0 48 247 Percentage of the requests served within a certain time (ms) 50% 48 66% 63 75% 76 80% 88 90% 216 95% 225 98% 229 99% 234 100% 247 (longest request)