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Wireshark-dev: Re: [Wireshark-dev] Performance degradation in trunk

From: Anders Broman <anders.broman@xxxxxxxxxxxx>
Date: Thu, 12 Sep 2013 12:54:00 +0000

-----Original Message-----
From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of Evan Huus
Sent: den 12 september 2013 13:15
To: balint@xxxxxxxxxxxxxxx; Developer support list for Wireshark
Subject: Re: [Wireshark-dev] Performance degradation in trunk

On 2013-09-12, at 5:40 AM, Bálint Réczey <balint@xxxxxxxxxxxxxxx> wrote:

>> Could they analyze perf results or run git bisect to find the point 
>> when the degradation started?

>Since this is on Ubuntu (which can run valgrind) just use the -p option to tools/valgrind-wireshark.sh and it will produce a performance profile. Do that for >both builds and we'll have something to work with.
>
>Evan

Here's the output from "trunk", how do you get anything useful from it?
/Anders

>PS I suspect some new heuristic dissector has been introduced, since none of the other changes from 1.8 to trunk are likely to have such a significant >performance impact.

> Cheers,
> Balint
> 
> 2013/9/12 Anders Broman <anders.broman@xxxxxxxxxxxx>:
>> Hi,
>> 
>> I recently supplied some people with an internal build from recent 
>> trunk and got complaints on performance. Switching back
>> 
>> To the default Wireshark on the Ubuntu 13.04 system 1.8.2 reading of 
>> a 400M trace file with SIP Diameter etc traffic is more than twice as fast.
>> 
>> Regards
>> 
>> Anders
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