[Development] Cut 7+ms of Qt5 startup time on Linux

Thiago Macieira thiago.macieira at intel.com
Fri Nov 1 16:21:17 CET 2013


On sexta-feira, 1 de novembro de 2013 16:01:31, Marc Mutz wrote:
> Not directly related, but I've got some WIP on reducing relocations in Qt. 
> I've pretty much removed all gratuitous .data.rel.ro.local relocations from 
> QtGui and QtWidget, reducing relocations in QtGui from 7555 in stable to
> 5861 (-22%) in my branch and from 18424 down to 17606 (-4%) for QtWidgets.
> I haven't touched QtCore, yet, and didn't measure startup time.

Thanks, Marc!

This is an indication we're already in diminishing returns, though. I doubt 
you'll be able to find any measurable difference in startup time. My guess is 
that the difference is in the order of 100 ┬Ás or less.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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