[Bug 30653] New: Deleting text from richedit controls extremely slow
wine-bugs at winehq.org
wine-bugs at winehq.org
Fri May 11 21:36:01 CDT 2012
http://bugs.winehq.org/show_bug.cgi?id=30653
Bug #: 30653
Summary: Deleting text from richedit controls extremely slow
Product: Wine
Version: 1.5.4
Platform: x86
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: richedit
AssignedTo: wine-bugs at winehq.org
ReportedBy: dank at kegel.com
Classification: Unclassified
The attached program creates a richedit control containing $1
lines of text, then times how long it takes to delete the first 1000 lines.
Results on my e7300 from running "wine delete.exe 5000":
Builtin riched20: 97500 ms
Native riched20: 1800 ms
i.e. builtin is about 50 times slower than native.
It gets worse fast as you add lines.
+relay shows InvalidateRect is called a bazillion times (like in bug 30614).
The attached patch optimizes ME_InvalidateMarkedParagraphs to only
call InvalidateRect once per run of invalid paragraphs, and makes
deletion merely slow instead of crazy slow.
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