How to find the performance bottleneck of ngx_lua? suggestion tools？

[范洪毅]

hi：

    now   wo use ngx_lua online,

    qps 2000 ,cpu more than 60%,

   How to find   the performance bottleneck of ngx_lua? suggestion tools？

[Yichun Zhang (agentzh)]

Hello!

The best tools are the various Flame Graph tools for both on-CPU and
off-CPU, for both C-land and Lua-land:

https://github.com/agentzh/nginx-systemtap-toolkit#sample-bt

https://github.com/agentzh/stapxx#lj-lua-stacks

https://github.com/agentzh/nginx-systemtap-toolkit#ngx-sample-lua-bt

https://github.com/agentzh/nginx-systemtap-toolkit#sample-bt-off-cpu

They're good for both offline profiling during development and offline
profiling in production. We've been heavily relying on these tools to
optimize our global online systems at CloudFlare.

Regards,
-agentzh