2010/12/18 Daniel Stenberg <daniel_at_haxx.se>

> On Fri, 17 Dec 2010, Fei Yan wrote:
>
> What do you mean? How does libcurl's behavior change in "debug mode" ?
>>>
>>
>> I tried configure with --enable-debug, and the performance is quite bad,
>> over x10 times slower.
>>
>
> Sorry, but as a general statement that's simply not true.

I admit I might exaggerated the performance downgrade, but the result is,
originally all 1000 file upload could be done within 60 seconds, while after
the change (enable-debug, verbose open), it's much too slow and used up the
total 5 minutes (that's the required period).

> Debug mode disables optimizations (and adds -g to the compiler options) and
> runs a little extra code here and there, but I fail to see how that ends up
> ten times slower for anyone and it certainly has never slowed it down that
> much for me.
>
> Are you sure that's the only difference between your test runs? If so, what
> specific part/section/action is ten times slower?
>

Yes, pretty sure. I just rebuilt the libcurl, relink the application, and
enable the verbose option and redirect the logs to our file log handlers
(stdout/stderr streams are disabled in our application).

>
> --
>
> / daniel.haxx.se
>

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Received on 2010-12-20