On Jan 31, 2011, at 7:45 AM, Antoine Pitrou wrote: > On Mon, 31 Jan 2011 13:28:39 +0100 > "Jurjen N.E. Bos" <jurjen....@hetnet.nl> wrote: >> I just did it: my first python source code hack. >> I replaced the NEXTARG and PEEKARG macros in ceval.c using a cast to >> short pointer, and lo and behold, a crude measurement indicates one >> to two percent speed increase. >> That isn't much, but it is virtually for free! >> >> Here are the macro's I used: >> #define NEXTARG() (next_instr +=2, *(short*)&next_instr[-2]) >> #define PEEKARG() (*(short*)&next_instr[1]) > > Some architectures forbid unaligned access, so this can't be used as-is.
It could perhaps be #ifdef'd in on x86/x86-64, though, which is by far the most common architecture to run python on. James _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
