Lua API for ngx_google_perftools_profiler_module

Before use these tools, you must compile nginx/openresty with ngx_google_perftools_profiler_module

Please use opm, such as :

opm get chronolaw/lua-resty-gperftools

Some simple examples:

    location /gperftools {
        content_by_lua_block {
            local gperftools = require "resty.gperftools"

            local profiler = ngx.var.arg_profiler
            local action = ngx.var.arg_action
            local name = ngx.var.arg_name

            gperftools[profiler][action](name)

            -- or profiler in 10 seconds
            -- gperftools[profiler][action](name, 10)

            ngx.say("OK")
        }
    }

Then you can start/stop gperftools with curl like below:

    curl 'http://127.0.0.1/gperftools?profiler=cpu&action=start&name=/tmp/ngx_prof'
    ...     # ab/http_load/wrk and so on
    curl 'http://127.0.0.1/gperftools?profiler=cpu&action=stop'

Start cpu profiler, infomations stores in name.

If during is given, the profiler will STOP after during seconds.

Notice: It will NOT add pid suffix for the name.

Stop cpu profiler.

Start heap profiler, infomations stores in name, dump for every n seconds.

If during is given, the profiler will STOP after during seconds.

Notice: It will NOT add pid suffix for the name.

Dump heap profiler infomations, s for the reason.

Stop heap profiler.