Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Objective-C macro for measuring execution time of block of code.
// LOOProfiling.h
// Created by Marcin Swiderski on 4/12/12.
// Copyright (c) 2012 Marcin Swiderski. All rights reserved.
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
// USAGE: This macro is very simple to use:
// LOO_MEASURE_TIME(@"foo") {
// ... // Some code.
// LOO_MEASURE_TIME(@"bar") {
// ... // Some nested code.
// }
// ... // Maybe some more code.
// }
// Just remember not to use control instructions: return, break and goto inside the block.
// (break inside a loop in the block is okay though).
#define LOO_MEASURE_TIME(__message) \
for (CFAbsoluteTime startTime##__LINE__ = CFAbsoluteTimeGetCurrent(), endTime##__LINE__ = 0.0; endTime##__LINE__ == 0.0; \
NSLog(@"'%@' took %.6fs", (__message), (endTime##__LINE__ = CFAbsoluteTimeGetCurrent()) - startTime##__LINE__))

This comment has been minimized.

Copy link

@pepibumur pepibumur commented Sep 12, 2013

Thanks for the macro. I'll use in my projects

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.