2232068 requests in 29.98s, 374.64MB read
Requests/sec: 74442.91
Transfer/sec: 12.49MB
Nginx + Go through FastCGI TCP
# wrk -t100 -c5000 -d30s http://go.fcgi.tcp/
Running 30s test @ http://go.fcgi.tcp/
100 threads and 5000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 217.69ms 121.22ms 1.80s 75.14%
Req/Sec 263.09 102.78 629.00 62.54%
721027 requests in 30.01s, 121.02MB read
Socket errors: connect 0, read 0, write 176, timeout 1343
Requests/sec: 24026.50
Transfer/sec: 4.03MB
Nginx + Go through FastCGI Unix Socket
# wrk -t100 -c5000 -d30s http://go.fcgi.unix/
Running 30s test @ http://go.fcgi.unix/
100 threads and 5000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 694.32ms 332.27ms 1.79s 62.13%
Req/Sec 646.86 669.65 6.11k 87.80%
909836 requests in 30.00s, 152.71MB read
Requests/sec: 30324.77
Transfer/sec: 5.09MB
结论
第一组基准测试时一些Nginx的设置还没有很好的优化（启用gzip，Go的后端没有使用keep-alive连接）。当改为wrk以及按建议优化Nginx后结果有较大差异。
当GOMAXPROCS=1时，Nginx的开销不是那么大，但当OMAXPROCS=8时差异就很大了。以后可能会再试一下其他设置。如果你需要使用Nginx像虚拟主机，负载均衡，缓存等特性，使用HTTP proxy，别使用FastCGI。有些人说Go的FastCGI还没有被很好优化，这也许就是测试结果中巨大差异的原因。
