This Lua code execution context does support yielding, so Lua APIs that may yield (like cosockets, sleeping, and "light threads") are enabled in this context. Note, however, you still need to configure the ssl_certificate and ssl_certificate_key directives even though you will not use this...
To avoid this, put these calls requiring yielding into your own Lua functions in the Lua file instead of the top-level scope of the file. Back to TOC Lua Variable Scope Care must be taken when importing modules, and this form should be used: local xxx = require('xxx') instead of ...
Literal strings can also be defined using a long format enclosed by long brackets. We define an opening long bracket of level n as an opening square bracket followed by n equal signs followed by another opening square bracket. So, an opening long bracket of level 0 is written as [[, an ...
If the called function returns normally without ever yielding, lua_pcallk (and lua_callk) will also return normally. (Of course, instead of calling the continuation in that case, you can do the equivalent work directly inside the original function.) Besides the Lua state, the continuation ...
(with a ".lua" extension) can be started using the "Run Local" button of the task manager. Beware that some of the examples demonstrate advanced features that make little sense without first having read the corresponding manual section. For an example of application design have a look at ...
Too Long; Didn't ReadLua code running inside OpenResty or Nginx servers may consume too much CPU resources. Lua is known for its simplicity, small memory footprint, and high execution efficiency. The best way to quickly find all the CPU performance bottlenecks is the Lua-land CPU flame ...
** value. We assume that pointers are atomic too (e.g., gcc ensures that ** for all platforms where it runs). Moreover, 'hook' is always checked ** before being called (see 'luaD_hook'). */ LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count)...
and high execution efficiency, especially when using Just-in-Time (JIT) compilers likeLuaJIT. But still some times the Lua code running atop OpenResty or Nginx servers may consume too much CPU resources due to the programmer’s coding mistakes, calling out to some expensive C/C++ library code...
Bug{ what = [[garbage collector can trigger too many times in recursive loops]], report = [[Roberto, 2013/04/25]], since = [[5.2.2]], fix = [[5.2.3]], example = [[ function f() f() end f() -- it takes too long before a "stack overflow" error ]], ...
To avoid this, put these calls requiring yielding into your own Lua functions in the Lua file instead of the top-level scope of the file. As the standard Lua 5.1 interpreter's VM is not fully resumable, the methods ngx.location.capture, ngx.location.capture_multi, ngx.redirect, ngx.exec...