[Interest] Tricks to improve moc performance?

[Giuseppe D'Angelo]

Hi,

Il 06/12/19 10:48, Dmitriy Purgin ha scritto:
> Hi Giuseppe,
> 
>  > This trick is used in several places in Qt itself (look for "includemoc"
>  > in commits). Not only it helps build times but also it produces slightly
>  > better code overall.
> 
> Could you please elaborate what exactly do you mean under 'better code'? 
> How does including the xxx_moc.cpp affect the code generation by moc? If 
> moc decides to generate a better code when included explicitly in a cpp 
> file, why can't it generate the same better code otherwise? Is there a 
> technical reason for it?
> 

Sorry, not the code generated by moc -- the code generated by the 
compiler/linker. See e.g. here:

> https://codereview.qt-project.org/c/qt/qtbase/+/152423

HTH,

-- 
Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts

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