[LLVMdev] [PATCH]: MSVC build enhancements

[Isaac Dupree]

On 03/06/10 17:37, OvermindDL1 wrote:
> Whoops, mailing list headers still broken, sending to the list this time:
>
> On Sat, Mar 6, 2010 at 3:35 PM, OvermindDL1<overminddl1 at gmail.com>  wrote:
>> On Sat, Mar 6, 2010 at 11:40 AM, Cédric Venet<cedric.venet at laposte.net>  wrote:
>>> So adding an option for adding this flag would be great but not changing the
>>> default. (The flag is interesting because it can leads to great performance
>>> improvement in STL heavy code (up to x10 and more on particular code)).
>>
>> I use this for every bit of my code:
>>   /D_CRT_NONSTDC_NO_DEPRECATE /D_CRT_SECURE_NO_DEPRECATE
>> /D_CRT_SECURE_NO_WARNINGS /D_SECURE_SCL=0 /D_SCL_SECURE_NO_DEPRECATE
>> /D_HAS_ITERATOR_DEBUGGING=0
>>
>> In one particular class in one of my libraries, the speed difference
>> is the difference of it running in about 10ms, compared to it running
>> in about 12 minutes, and yes that is accurate.  That is a lot greater
>> then just "10x".

you mean the faster time *was* 10 ms, not that
there was a 10 ms difference...

12 minutes = 720 seconds = 720000 ms. You describe a 72000x difference :)

-Isaac