commit d49112515ce338334b75a795ab6aaf08daa5b489 Author: Isis Lovecruft isis@torproject.org Date: Fri Apr 17 23:49:13 2015 +0000

Add a test utility for benchmarking code. --- lib/bridgedb/test/util.py | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)

diff --git a/lib/bridgedb/test/util.py b/lib/bridgedb/test/util.py index 234a9b6..9e401a5 100644 --- a/lib/bridgedb/test/util.py +++ b/lib/bridgedb/test/util.py @@ -18,6 +18,7 @@ import errno import ipaddr import os import random +import time

from functools import wraps

@@ -146,3 +147,33 @@ def randomIPString(): #: being run as a ``TestCase`` by ``twisted.trial``. TestCaseMixin = bdbutil.mixin TestCaseMixin.register(unittest.TestCase) + + +class Benchmarker(object): + """Wrap a context with a timer to benchmark execution time. + + .. hint:: Use like so:: + + with Benchmarker(): + foo(bar, baz) + + Once the ``with`` context exits, something like:: + + Benchmark: 180.269957ms (0s) + + will be printed to stdout (if **verbose** is set to ``True``). + """ + + def __init__(self, verbose=True): + self.verbose = verbose + + def __enter__(self): + self.start = time.time() + return self + + def __exit__(self, *args): + self.end = time.time() + self.seconds = self.end - self.start + self.milliseconds = self.seconds * 1000 + if self.verbose: + print("Benchmark: %12fms %12fs" % (self.milliseconds, self.seconds))