[issue7593] Computed-goto patch for RE engine

A.M. Kuchling report at bugs.python.org
Wed Feb 17 16:13:59 CET 2010

A.M. Kuchling <lists at amk.ca> added the comment:

Actually, I really want someone to verify that measurement.  As a control, I tried running the call_method benchmark (after a few more xrange fixes).  The Python 3.x trunk version with my patch is measured as 1.0227x slower, even though the patch only touches the re module and call_method doesn't use the module at all.  I recompiled both binaries; both builds are using the same compiler arguments; both have the same version from trunk.  I'm mystified about why the patched version is slower.


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