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#!/usr/bin/env python3
# Copyright 2014-2021 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# SPDX-License-Identifier: GPL-3.0-or-later
"""Profile qutebrowser."""
import sys
import cProfile
import os.path
import os
import tempfile
import subprocess
import shutil
import argparse
import shlex
sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir,
os.pardir))
import qutebrowser.qutebrowser
def parse_args():
"""Parse commandline arguments.
Return:
A (namespace, remaining_args) tuple from argparse.
"""
parser = argparse.ArgumentParser()
parser.add_argument('--profile-tool', metavar='TOOL',
action='store', choices=['kcachegrind', 'snakeviz',
'gprof2dot', 'tuna', 'none'],
default='snakeviz',
help="The tool to use to view the profiling data")
parser.add_argument('--profile-file', metavar='FILE', action='store',
default="profile_data",
help="The filename to use with --profile-tool=none")
parser.add_argument('--profile-test', action='store_true',
help="Run pytest instead of qutebrowser")
return parser.parse_known_args()
def main():
args, remaining = parse_args()
tempdir = tempfile.mkdtemp()
if args.profile_tool == 'none':
profilefile = os.path.join(os.getcwd(), args.profile_file)
else:
profilefile = os.path.join(tempdir, 'profile')
sys.argv = [sys.argv[0]] + remaining
profiler = cProfile.Profile()
if args.profile_test:
import pytest
profiler.runcall(pytest.main)
else:
profiler.runcall(qutebrowser.qutebrowser.main)
# If we have an exception after here, we don't want the qutebrowser
# exception hook to take over.
sys.excepthook = sys.__excepthook__
profiler.dump_stats(profilefile)
if args.profile_tool == 'none':
print("Profile data written to {}".format(profilefile))
elif args.profile_tool == 'gprof2dot':
# yep, shell=True. I know what I'm doing.
subprocess.run(
'gprof2dot -f pstats {} | dot -Tpng | feh -F -'.format(
shlex.quote(profilefile)), shell=True, check=True)
elif args.profile_tool == 'kcachegrind':
callgraphfile = os.path.join(tempdir, 'callgraph')
subprocess.run(['pyprof2calltree', '-k', '-i', profilefile,
'-o', callgraphfile], check=True)
elif args.profile_tool == 'snakeviz':
subprocess.run(['snakeviz', profilefile], check=True)
elif args.profile_tool == 'tuna':
subprocess.run(['tuna', profilefile], check=True)
shutil.rmtree(tempdir)
if __name__ == '__main__':
main()
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