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http://www.openoffice.org/issues/show_bug.cgi?id=58623
Issue #:|58623
Summary:|impress import performance ...
Component:|Drawing
Version:|680m137
Platform:|All
URL:|
OS/Version:|All
Status:|NEW
Status whiteboard:|
Keywords:|
Resolution:|
Issue type:|DEFECT
Priority:|P3
Subcomponent:|open-import
Assigned to:|cl
Reported by:|mmeeks
------- Additional comments from [EMAIL PROTECTED] Tue Nov 29 06:23:07 -0800
2005 -------
Hi Christian:
While poking with speedprof at the load performance [roughly while the
progress bar is doing it's inexorable march] of a stock corporate 20
slide presentation; I was interested that 5-8% of the time
[ approximately] seems to be spend in SvxFont::QuickGetTextSize. Of
course, optimizing there is prolly a waste of time the inefficiency is
elsewhere no doubt. Nonetheless I dumped the strings being measured
there; a quick sort | uniq -c | sort -n shows that we tend to measure
the same string quite a lot:
duplicate measurements
discrete string count
[optional text]
1 3 - ie. 3 strings were measured only once
2 22
3 90
4 197 - ie. most 'real' strings measured 4 times
5 0
[ chop some low amplitude harmonics - presumably
manually dupped strings in pages ]
16 1 'Novell Linux'
19 1 '®'
84 1 'Click to add an outline'
150 1 'Click to add title'
240 1 'Click to add notes'
So - of the 1920 strings total - 83% are measured more than 4 times,
and 25% are measured > 80 times each.
Hopefully it's possible to unwind some higher-level inefficiency from
that lot; presumably there is some missing freeze/thaw logic dealing
with the TextObject somewhere.
My profiles seemed to suggest that lots of the work is done by children of
SdrTextObject:NbcAdjustTextFrameWidthAndHeight - that being split in 2 equal
parts:
Outliner::SetText, Outliner::SetUpdateMode.
AdjustTextFrameWidthAndHeight seems to get called a lot from:
SetOutlinerParaObject
SetStyleSheet
SetLogicRect
SetSnapRect
Which may explain the 4-fold duplication of lots of things above. Presumably we
set a number of these properties & the content & then want to trigger the resize
/ calculate at the endElement; as we remove the ActionLock etc. ?
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