https://bugzilla.novell.com/show_bug.cgi?id=464135
Summary: New regexp compiler much slower (~80x) than the old one
with certain regexps
Product: Mono: Class Libraries
Version: 2.2.x
Platform: x86-64
OS/Version: openSUSE 11.1
Status: ASSIGNED
Severity: Critical
Priority: P5 - None
Component: System
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Found By: Development
Created an attachment (id=263602)
--> (https://bugzilla.novell.com/attachment.cgi?id=263602)
Test case
The attached test case demonstrates the issue. The source code comes from
MojoPortal 2.2.7.9 (http://mojoportal.com/). Running the test on my machine
(Intel dual core, 2.2GHz) gives the following results:
Running tests...
Time for the new regexp compiler: 00:00:46.3967490
Time for the old regexp compiler: 00:00:00.5921550
Done
Setting the severity to critical as it affects mojoportal performance (each
request takes 40+ seconds to complete) and the new engine is used by default in
the 2.2 branch.
Exporting MONO_OLD_RX "fixes" the issue but I don't think this is a viable
solution for 2.2
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