[Python-Dev] patch: speed up name access by up to 80% (original) (raw)

Oren Tirosh oren-py-d@hishome.net
Tue, 12 Feb 2002 09:05:14 +0200

On Mon, Feb 11, 2002 at 07:14:25PM -0500, Jeremy Hylton wrote:

So simple benchmark programs are a lot more interesting.

I'd pick pystone, testhmac, and testhtmlparser.

test_htmlparser (x100): 0m29.950s 0m29.730s test_hmac (x1000): 0m16.480s 0m15.720s (lower is better) pystone: 11261.3 11494.3 (higher is better)

A small, but measureable improvement. You can see below that most accesses are still to fastlocals and, of course, the code has some real work to do other than looking up names.

test_htmlparser: 362331 fastlocal non-dictionary lookups 60106 inline dictionary lookups 10554 fast dictionary lookups 151 slow dictionary lookups

test_hmac: 13959 fastlocal non-dictionary lookups 9920 inline dictionary lookups 7548 fast dictionary lookups 240 slow dictionary lookups

pystone: 1447094 fastlocal non-dictionary lookups 502190 inline dictionary lookups 111549 fast dictionary lookups 111 slow dictionary lookups

Anyone has an example of a program that relies on a lot of global and builtin name accesses? Meanwhile I'm going to start working on LOAD_ATTR.

if-the-evidence-doesn't-fit-the-theory...-ly yours,

Oren