os.clock
Lua function

os.clock

Summary

Amount of elapsed/CPU time used (depending on OS)

Prototype

cpu = os.clock ()


Description

Returns the approximate amount of CPU time used by the current process in seconds.


print (os.clock () / 60 / 60) --> 34.381006944444 (hours)


WARNING - under Linux and Mac OS os.clock returns the CPU time used. However, under Windows it returns the elapsed time that the process has been running (not the CPU time used). This is because the operating system call "clock" works differently under Windows.

See Also ...

Topics

DOC_lua_base Lua base functions
DOC_lua_bc Lua bc (big number) functions
DOC_lua_bit Lua bit manipulation functions
DOC_lua_coroutines Lua coroutine functions
DOC_lua_debug Lua debug functions
DOC_lua_io Lua io functions
DOC_lua_math Lua math functions
DOC_lua_os Lua os functions
DOC_lua_package Lua package functions
DOC_lua_rex Lua PCRE regular expression functions
DOC_lua Lua script extensions
DOC_lua_string Lua string functions
DOC_lua_tables Lua table functions
DOC_lua_utils Lua utilities
DOC_scripting Scripting

Lua functions

LUA_os.date os.date (Formats a date/time string)
LUA_os.difftime os.difftime (Calculates a time difference in seconds)
LUA_os.execute os.execute (Executes an operating system command)
LUA_os.exit os.exit (Attempts to terminate the process)
LUA_os.getenv os.getenv (Returns an operating system environment variable)
LUA_os.remove os.remove (Deletes a file)
LUA_os.rename os.rename (Renames a file)
LUA_os.setlocale os.setlocale (Sets the current locale to the supplied locale)
LUA_os.time os.time (Returns the current time or calculates the time in seconds from a table)
LUA_os.tmpname os.tmpname (Returns a name for a temporary file)

(Help topic: lua=os.clock)

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