注：本文对于新版本的golang并不使用，go1以后go的性能已经有了比较好的提升，具体测试见： http://www.cnblogs.com/QLeelulu/archive/2012/08/12/2635261.html
听说Go是很不错的语言，了解了一下，一些特性确实很不错。
顺便测试了一下http与node.js的性能对比。
go的代码：
（注：是用8g, 8l编译的）
node.js的代码：
ab测试结果：
==** GO **==
$ ab -c 100 -n 1000 http://127.0.0.1:8080/
This is ApacheBench, Version 2.3<$Revision: 655654$>Server Software:
127.0.0.1
Server Hostname:
Server Port: 8080Document
Path: /
Document Length: 1 bytesConcurrency Level:
100
Time taken for tests: 0.322 seconds
Complete requests: 1000
Failed requests: 0
Write errors: 0
Total transferred: 97000 bytes
HTML transferred: 1000 bytes
Requests per second: 3105.62 [#/sec] (mean)
Time per request: 32.200 [ms] (mean)
Time per request: 0.322 [ms] (mean, across all concurrent requests)
Transfer rate: 294.18 [Kbytes/sec] receivedConnection Times
(ms)
min mean[+/-sd] median max
Connect: 000.703
Processing: 13010.52955
Waiting: 13010.52955
Total: 43010.12955
==** Node.js **==
$ ab -c 100 -n 1000 http://127.0.0.1:8080/
This is ApacheBench, Version 2.3<$Revision: 655654$>Server Software:
127.0.0.1
Server Hostname:
Server Port: 8080Document
Path: /
Document Length: 12 bytesConcurrency Level:
100
Time taken for tests: 0.143 seconds
Complete requests: 1000
Failed requests: 0
Write errors: 0
Total transferred: 50000 bytes
HTML transferred: 12000 bytes
Requests per second: 6993.50 [#/sec] (mean)
Time per request: 14.299 [ms] (mean)
Time per request: 0.143 [ms] (mean, across all concurrent requests)
Transfer rate: 341.48 [Kbytes/sec] receivedConnection Times
(ms)
min mean[+/-sd] median max
Connect: 001.104
Processing: 2136.61330
Waiting: 2136.61330
Total: 2146.41430
webbench测试结果
==** GO **==
$ webbench -t 30 -c 100 http://127.0.0.1:8080/
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.Benchmarking: GET http:
//127.0.0.1:8080/
100 clients, running 30 sec.Speed
=146934 pages/min, 262032 bytes/sec.
Requests: 73467 susceed,0 failed.
==** Node.js **==
$ webbench -t 30 -c 100 http://127.0.0.1:8080/
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.Benchmarking: GET http:
//127.0.0.1:8080/
100 clients, running 30 sec.Speed
=485128 pages/min, 404273 bytes/sec.
Requests: 242564 susceed,0 failed.
从测试结果来看，node.js的HTTP SERVER性能是Go的两倍还多，而且让我比较郁闷的是，在用webbench进行测试的时候，可以看到go是用了我的笔记本上的四个核的CPU的，而node.js当然是只跑在一个核上，而Go居然还比node.js慢这么多。
然后我google，就看到：golang helloworld 45% slower than node.js
求真相！
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