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#!/usr/bin/env python
"""
compare_bench.py - Compare two benchmarks or their results and report the
difference.
"""
import sys
import gbench
from gbench import util, report
def main():
# Parse the command line flags
def usage():
print('compare_bench.py <test1> <test2> [benchmark options]...')
exit(1)
if '--help' in sys.argv or len(sys.argv) < 3:
usage()
tests = sys.argv[1:3]
bench_opts = sys.argv[3:]
bench_opts = list(bench_opts)
# Run the benchmarks and report the results
json1 = gbench.util.run_or_load_benchmark(tests[0], bench_opts)
json2 = gbench.util.run_or_load_benchmark(tests[1], bench_opts)
output_lines = gbench.report.generate_difference_report(json1, json2)
print 'Comparing %s to %s' % (tests[0], tests[1])
for ln in output_lines:
print(ln)
if __name__ == '__main__':
main()
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