Re: Why does free() take 1,100 microseconds?

Subject: Re: Why does free() take 1,100 microseconds?

From: Garth Cummings <email@hidden>

Date: Tue, 26 Jul 2005 10:34:20 -0700

Delivered-to: email@hidden

Hi Neal,

On Jul 26, 2005, at 7:19 AM, neal olander wrote:

I've got a time critical application that must run very, very fast. The application is written in C++ with Project Builder, running on MacOSX. The application runs fine, but there is a speed bottleneck I have: I've traced it down to a single call to free() which is freeing a memory buffer (approx 1 MB) that was earlier allocated with malloc().

This single call to free() takes about 1,100 microseconds.

<snip>

Any suggestions would be appreciated! Thanks in advance!

How about profiling your code with Shark to find out exactly what code path is slowing you down?

<http://developer.apple.com/tools/performance/>.

Performance and optimization questions can be posted to the perfoptimization-dev mailing list:

<http://lists.apple.com/mailman/listinfo/perfoptimization-dev>

Good luck!

--gc

__________________________________________________________________

Garth Cummings

Apple Developer Technical Support email@hidden

http://developer.apple.com/technicalsupport

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References:
	>Why does free() take 1,100 microseconds? (From: "neal olander" <email@hidden>)