Re: Why is DDD so slow ?

[Arnaud Desitter]

Hi,

In short, you are very welcome to make it faster.
A few hints:
- use the CVS repository version (./CVSmake will bootstrap the
 configuration process)
- ddd --trace gives you a timing for the various operations.
- building ddd with profiling ("-pg -g" under g++) will help.
 Run the instrumented ddd, reproduce the problem, stop it.
 Then "gprof /path/to/ddd" should give you some information.

The code that reads a source file could much better written. That
may well be your problem.

Good patches will be applied.

Regards,

----- Original Message ----- 
From: <address@hidden>
Newsgroups: gmane.comp.debugging.ddd.general
Sent: Friday, March 04, 2005 10:14 AM
Subject: Why is DDD so slow ?


Hello,

We have a quite large project here: The binary (including debug info) is
64MB big. When I open it with ddd, it takes about 30 seconds until I can
start my debug session (i.e. 30s untill the code appears).

What do I do first ? Select the sourcefile, where I want to set my
breakpoint. The comfortable way would be File->Open Source. But this takes
another 90 seconds till the dialog appears ! If I want to filter out some
files, there go the next 90s ...

Of course, I never use File->Open Source because of this slowness. But a
newbee here looked with very big eyes at me as I showed him this: His
debugger in kdevelop has none of these annoyancies: He can start debugging
immediately and has a nice combobox where he can switch sourcefiles on the
fly.

Since both are "just" using gdb, I think ddd does something wrong.

Now don't get me wrong: I like ddd so much that I use it allthough it is
so slow. But couldn't you do something to improve performance in these two
points ?


Mit freundlichen Grüßen

Markus Grunwald
Softwareentwicklung

PRÜFTECHNIK Condition Monitoring GmbH
Oskar-Messter-Straße 19-21
85737 Ismaning
www.pruftechnik.com
Tel: +49 (0)89 99616177
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