| #!/usr/bin/env python3 |
| # Copyright 2017 Google Inc. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import argparse |
| import json |
| import os |
| import sys |
| import time |
| |
| THIS_DIR = os.path.abspath(os.path.dirname(__file__)) |
| REPO_DIR = os.path.dirname(THIS_DIR) |
| if not REPO_DIR in sys.path: |
| sys.path.insert(0, REPO_DIR) |
| |
| import json5 # pylint: disable=wrong-import-position |
| |
| |
| ALL_BENCHMARKS = ( |
| '64KB-min.json', |
| 'bitly-usa-gov.json', |
| 'twitter.json', |
| ) |
| |
| |
| DEFAULT_ITERATIONS = 3 |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser() |
| parser.add_argument('--pure', action='store_true') |
| parser.add_argument('-n', '--num-iterations', default=DEFAULT_ITERATIONS, |
| type=int) |
| parser.add_argument('benchmarks', nargs='*') |
| args = parser.parse_args() |
| if not args.benchmarks: |
| args.benchmarks = [os.path.join(THIS_DIR, d) for d in ALL_BENCHMARKS] |
| |
| file_contents = [] |
| for f in args.benchmarks: |
| with open(f) as fp: |
| file_contents.append(fp.read()) |
| |
| |
| # json.decoder.c_scanstring = py_scanstring |
| def py_maker(*args, **kwargs): |
| del args |
| del kwargs |
| decoder = json.JSONDecoder() |
| decoder.scan_once = json.scanner.py_make_scanner(decoder) |
| decoder.parse_string = json.decoder.py_scanstring |
| json.decoder.scanstring = decoder.parse_string |
| return decoder |
| |
| maker = py_maker if args.pure else json.JSONDecoder |
| |
| all_times = [] |
| for i, c in enumerate(file_contents): |
| json_time = 0.0 |
| json5_time = 0.0 |
| for _ in range(args.num_iterations): |
| start = time.time() |
| json_obj = json.loads(c, cls=maker) |
| mid = time.time() |
| json5_obj = json5.loads(c) |
| end = time.time() |
| |
| json_time += mid - start |
| json5_time += end - mid |
| assert json5_obj == json_obj |
| all_times.append((json_time, json5_time)) |
| |
| for i, (json_time, json5_time) in enumerate(all_times): |
| fname = os.path.basename(args.benchmarks[i]) |
| if json5_time and json_time: |
| if json5_time > json_time: |
| avg = json5_time / json_time |
| print("%-20s: JSON was %5.1fx faster (%.6fs to %.6fs)" % ( |
| fname, avg, json_time, json5_time)) |
| else: |
| avg = json_time / json5_time |
| print("%-20s: JSON5 was %5.1fx faster (%.6fs to %.6fs)" % ( |
| fname, avg, json5_time, json_time)) |
| elif json5_time: |
| print("%-20s: JSON5 took %.6f secs, JSON was too fast to measure" % |
| (fname, json5_time)) |
| elif json_time: |
| print("%-20s: JSON took %.6f secs, JSON5 was too fast to measure" % |
| (fname, json_time)) |
| else: |
| print("%-20s: both were too fast to measure" % (fname,)) |
| |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |