Public bug reported:
After I had upgraded my system from dapper to edgy. Not all of them but
some Qt based applications are too slow (such as Qt Designer). I have a
suspect that the problem is about the font operations.
I wrote a small python script which increments the pointsize of a font
and retrieves its character height. I sent it to my friends. People who
are using edgy, ran this program in about 20 seconds. People who are
using other distros ran it in less than 1 second.
I can't figure out why this problem occurs, but I didn't have this
problem when I was using dapper.
Here's the small python script
-------------------------------------------
# -*- coding: utf-8 -*-
from qt import *
def createFontMap():
minPointSize = 1
maxPointSize = 76
font = QFont()
fontMap = []
for pointSize in xrange(minPointSize, maxPointSize + 1):
font.setPointSize(pointSize)
fontMetrics = QFontMetrics(font)
fontHeight = fontMetrics.height()
fontMap.append((pointSize, fontHeight))
return fontMap
a = QApplication([])
createFontMap()
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
--
Qt is too slow in font operations
https://launchpad.net/bugs/76766
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