comparison contrib/perf.py @ 31397:8f5ed8fa39f8

perf: perform a garbage collection before each iteration

Currently, no explicit garbage collection is performed when running
the microbenchmarks in `hg perf`. I think this is wrong because
garbage collection can have a significant impact on execution times.
And, if gc is triggered via the default heuristics, it will
fire effectively randomly during subsequent benchmark iterations
due to variable amount of garbage left over from previous runs.

Running a gc before invoking the measured function will help ensure
state is more consistent across all iterations.

31396:ab3e9eab754f

# - make perf command for recent feature work correctly with early
#   Mercurial

from __future__ import absolute_import
import functools
import os
import random
import sys
import time
from mercurial import (

def stub_timer(fm, func, title=None):
    func()

def _timer(fm, func, title=None):
    results = []
    begin = util.timer()
    count = 0
    while True:
        ostart = os.times()

31397:8f5ed8fa39f8

# - make perf command for recent feature work correctly with early
#   Mercurial

from __future__ import absolute_import
import functools
import gc
import os
import random
import sys
import time
from mercurial import (

def stub_timer(fm, func, title=None):
    func()

def _timer(fm, func, title=None):
    gc.collect()
    results = []
    begin = util.timer()
    count = 0
    while True:
        ostart = os.times()