os.difftime
Lua function

os.difftime

Summary

Calculates a time difference in seconds

Prototype

n = os.difftime (t1, t2)


Description

Returns the number of seconds from time t1 to time t2.

In other words, the result is t1 - t2.


tstart = os.time ()
-- do something lengthy here ..
tend = os.time ()
print (os.difftime (tend , tstart)) --> 3


When using MUSHclient (ie. this is not standard Lua) you can get better resolution by using GetInfo (which uses the Windows "high performance" timer), like this:


tstart = GetInfo (232)  -- get high-resolution timer value
-- do something lengthy here ..
tend = GetInfo (232)    
print (string.format ("Time taken = %1.3f seconds", tend - tstart))


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.clock os.clock (Amount of elapsed/CPU time used (depending on OS))
LUA_os.date os.date (Formats a date/time string)
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.difftime)

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