cvs commit: src/lib/libc/stdlib malloc.c

[Jason Evans]

On Jan 26, 2006, at 6:51 PM, Andrey Chernov wrote:
> I worry about my system performance. Could you please make all  
> statistics
> and debug code conditional, debending on some flags which could be  
> set as
> malloc options? Even in case this is a test period now, some people
> perhaps don't want some tests. It is much easy to turn some tests  
> off via
> malloc options than to comment out manually corresponding malloc.c  
> defines
> after each cvsup.

Unfortunately, run-time checks for the debugging features are  
expensive, since the debugging code is scattered throughout  
malloc.c.  This pretty much mandates compile-time configuration, for  
performance reasons.

I can disable statistics and debugging, if there's a general  
consensus to do so.  How much performance difference is the debug/ 
stats code making for you?  I've only been disabling debug/stats for  
benchmarking purposes, so I don't have a good feel for how much it  
impacts overall system performance.

Thanks,
Jason