nodejs测试： buffer跟字符串相加对比测试-JavaSript-爱易网页

nodejs测试： buffer跟字符串相加对比测试

日期：2014-05-16　浏览次数：20559 次

nodejs测试： buffer和字符串相加对比测试

看到jsconf2010.pdf写的关于buffer对象和string字符串相加的对比图表。发现buffer对象响应的变化很大，眼见为实，因此证实一下：

准备：

apache ab模拟并发，编写两份代码

os: debian 6.0

cpu: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz

mem: 4G

代码：

说明：定义两个监听，实现不同的字符串拼接，并监听不同的端口，方便测试。

运行：

/usr/mytools/httpd/bin/ab -c 300 -n 10000 http://127.0.0.1:1339 <pre name="code" class="html">/usr/mytools/httpd/bin/ab -c 300 -n 10000 http://127.0.0.1:1340</pre>

结果：

madding@wmmad:~$ /usr/mytools/httpd/bin/ab -c 300 -n 10000 http://127.0.0.1:1339/ This is ApacheBench, Version 2.3 <$Revision: 655654 {1}gt; Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 127.0.0.1 (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: Server Hostname: 127.0.0.1 Server Port: 1339 Document Path: / Document Length: 16384 bytes Concurrency Level: 300 Time taken for tests: 3.602 seconds Complete requests: 10000 Failed requests: 0 Write errors: 0 Total transferred: 164220000 bytes HTML transferred: 163840000 bytes Requests per second: 2776.02 [#/sec] (mean) Time per request: 108.068 [ms] (mean) Time per request: 0.360 [ms] (mean, across all concurrent requests) Transfer rate: 44519.36 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 36 326.6 0 3008 Processing: 1 47 29.8 46 570 Waiting: 1 47 29.8 46 570 Total: 1 83 328.9 46 3094 Percentage of the requests served within a certain time (ms) 50% 46 66% 60 75% 68 80% 72 90% 81 95% 90 98% 141 99% 3033 100% 3094 (longest request) madding@wmmad:~$ /usr/mytools/httpd/bin/ab -c 300 -n 10000 http://127.0.0.1:1340/ This is ApacheBench, Version 2.3 <$Revision: 655654 {1}gt; 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 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests Completed 9000 requests Completed 10000 requests Finished 10000 requests Server Software: Server Hostname: 127.0.0.1 Server Port: 1340 Document Path: / Document Length: 16384 bytes Concurrency Level: 300 Time taken for tests: 1.167 seconds Complete requests: 10000 Failed requests: 0 Write errors: 0 Total transferred: 164220000 bytes HTML transferred: 163840000 bytes Requests per second: 8565.63 [#/sec] (mean) Time per request: 35.024 [ms] (mean) Time per requ <div class="clearfix"></div> </div> <nav aria-label="..."> <ul class="pager"> <li class="previous"><a href="39072">上一篇： ssh如何知道删除实体成不成功 </a></li> <li class="next"><a href="20729">下一篇： jsp charset 跟 pageEncoding的联系和区别 </a></li> </ul> </nav> <div class="alert alert-warning" role="alert"> <strong>免责声明：</strong> 本文仅代表作者个人观点，与爱易网无关。其原创性以及文中陈述文字和内容未经本站证实，对本文以及其中全部或者部分内容、文字的真实性、完整性、及时性本站不作任何保证或承诺，请读者仅作参考，并请自行核实相关内容。 </div> <div class="panel panel-default"> <div class="panel-heading"> <h3 class="panel-title">相关资料<span><a target="_blank" class="pull-right" href="/javasript/">更多></a></span></h3> </div> <div class="panel-body row"> <ol> <div 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