[Python-Dev] What about CALL_ATTR?
bac at OCF.Berkeley.EDU
Wed Feb 23 20:58:54 CET 2005
Reinhold Birkenfeld wrote:
> While rummaging in the old patches, I found this:
> The result of the PyCore sprint of me and Brett: the CALL_ATTR opcode
> (LOAD_ATTR and CALL_FUNCTION combined) that skips the PyMethod creation
> and destruction for classic classes (but not newstyle classes, yet.)
> The code is somewhat rough yet, it needs commenting, some renaming, and
> most importantly testing. It seems to work, however, and provides
> between a 35% and 5% speedup. (5% in 'average' code, up to 35% in
> instance method calls and instance creation alone.) It also needs to be
> updated to include newstyle classes. I will likely work on this on the
> flight home.
> (patch #709744)
> How is the status of this? Sounds promising, I'd say...
See my reply in the "Store x Load x --> DupStore" thread at
Basically Thomas discovered that it was slower when used with new-style
classes. But this was almost two years ago with Thomas having not done hacking
on the core for two years IIRC and me having practically zero experience.
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