[pypy-dev] set with instances very slow from 1.8 to 1.9

[wilk]

Hi,

I could isolate a piece of my code that show a big regression from 1.8 
to 1.9, event from cpython to 1.9 with operations on set of instances.  
On the other side set of integer are faster !

Should i open an issue on the bug tracker ?


$ python t.py
with instances = 0.02350
with integers =  0.02825

$ pypy-1.8 t.py
with instances = 0.00935
with integers =  0.02891

$ pypy-1.9 t.py
with instances = 0.41753
with integers =  0.00628

pypy-last/bin/pypy t.py
with instances = 0.34686
with integers =  0.00628


import random
import time
import sys

class X:
    pass

def bcl(a,b):
    for i in range(1000):
        a |= b

x1 = set([X() for i in range(1000)])
x2 = set([X() for i in range(1000)])

start = time.time()

bcl(x1, x2)

print "with instances = %.05f" % (time.time()-start)

x1 = set(range(1000))
x2 = set(range(1000))

start = time.time()

bcl(x1, x2)

print "with integers =  %.05f" % (time.time()-start)



-- 
William Dodé
Informaticien Indépendant