[Qt-creator] Bad performance ClangCodeModel plugin

[Milian Wolff]

On Thursday 15 May 2014 06:51:47 Sergey Shambir wrote:
> Create precompiled header and use it to improve performance. Existing
> precompiled header can be enabled for clang model in project settings
> (Ctrl+5) / tab "Clang Settings".
> 
> Precompiled header can contain either several C++ standard library
> headers like <vector>, <string>, <algorithm>, <memory> or Qt headers
> like <QtCore>, <QtGui>. Too much headers in PCH can drop perfomance again.

I haven't looked into the implementation of QtCreator's clang plugin so far, 
but don't you guys cache the CXTranslationUnit for the open file(s)? In my 
experience with KDevelop's clang plugin, calling clang_codeCompleteAt on the 
cached CXTranslationUnit is extremely fast even without manual creation of 
PCH. But we do pass CXTranslationUnit_CacheCompletionResults and 
CXTranslationUnit_PrecompiledPreamble to the initial call to 
clang_parseTranslationUnit.

Anyhow, maybe you do that already and something else is going on here. Just 
wanted to mention this. Hope it helps!

> 15.05.2014 06:41, Freddy Martinez Garcia пишет:
> > Hi guys
> > 
> > I'm testing qt5.3 RC.... I'm using c++11 in my project, and with
> > ClangCodeModel i have c++11 code completion as I need, but... ¿why its
> > performance is so bad?
> > 
> > when I invoke a code completion, it show one or 2two seconds later...
> > 
> > I don't think that my problem is a hardware because i have:
> > 
> > OS -> Maveriks 10.9.2
> > MacBookPro with Retina Display ME294  2014
> > core i7 2.6GHz 4th generation with turbo bust until 3.8 GHz
> > 16 Gb RAM 1600 MHz
> > 1 Tb SSD
> > 
> > 
> > so, I have a great hardware and the performance of the code completion
> > when I use ClangCodeModel is very bad...
> > 
> > I don't know if I need to configure something else
> > 
> > anyone know about it ??
> > 
> > best regards
> > 
> > Freddy
> > _______________________________________________
> > Qt-creator mailing list
> > Qt-creator at qt-project.org
> > http://lists.qt-project.org/mailman/listinfo/qt-creator

-- 
Milian Wolff
mail at milianw.de
http://milianw.de