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test_benchmark.py: Make number of reps configurable via env var #26306

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Merged
sbc100 merged 1 commit into from
Feb 19, 2026
Merged

test_benchmark.py: Make number of reps configurable via env var #26306

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13 changes: 6 additions & 7 deletions test/test_benchmark.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@
# 5: 10 seconds
DEFAULT_ARG = '4'

TEST_REPS = 5
EMTEST_REPS = int(os.environ.get('EMTEST_REPS', '5'))

# by default, run just core benchmarks
CORE_BENCHMARKS = True
Expand Down Expand Up @@ -79,9 +79,8 @@ def build(self, parent, filename, shared_args, emcc_args, native_args, native_ex
def get_output_files(self):
pass

def bench(self, args, output_parser=None, reps=TEST_REPS, expected_output=None):
def bench(self, args, reps, output_parser=None, expected_output=None):
self.times = []
self.reps = reps
for _ in range(reps):
start = time.time()
output = self.run(args)
Expand Down Expand Up @@ -115,7 +114,7 @@ def display(self, baseline=None):
else:
median = sorted_times[count // 2]

print(' %10s: mean: %4.3f (+-%4.3f) secs median: %4.3f range: %4.3f-%4.3f (noise: %4.3f%%) (%d runs)' % (self.name, mean, std, median, min(self.times), max(self.times), 100 * std / mean, self.reps), end=' ')
print(' %10s: mean: %4.3f (+-%4.3f) secs median: %4.3f range: %4.3f-%4.3f (noise: %4.3f%%) (%d runs)' % (self.name, mean, std, median, min(self.times), max(self.times), 100 * std / mean, len(self.times)), end=' ')

if baseline:
mean_baseline = sum(baseline.times) / len(baseline.times)
Expand Down Expand Up @@ -436,7 +435,7 @@ def hardcode_arguments(self, code, args):

def do_benchmark(self, name, src, expected_output='FAIL', args=None,
emcc_args=None, native_args=None, shared_args=None,
force_c=False, reps=TEST_REPS, native_exec=None,
force_c=False, reps=EMTEST_REPS, native_exec=None,
output_parser=None, lib_builder=None,
skip_benchmarkers=None):
if not benchmarkers:
Expand All @@ -458,7 +457,7 @@ def do_benchmark(self, name, src, expected_output='FAIL', args=None,
reps = 0
print('Running benchmarker: %s: %s' % (b.__class__.__name__, b.name))
b.build(self, filename, shared_args, emcc_args, native_args, native_exec, lib_builder)
b.bench(args, output_parser, reps, expected_output)
b.bench(args, reps, output_parser, expected_output)
recorded_stats = b.display(baseline)
if recorded_stats:
self.add_stats(name, recorded_stats)
Expand Down Expand Up @@ -736,7 +735,7 @@ def test_conditionals(self):
return 0;
}
'''
self.do_benchmark('conditionals', src, 'ok', reps=TEST_REPS)
self.do_benchmark('conditionals', src, 'ok')

def test_fannkuch(self):
src = read_file(test_file('third_party/fannkuch.c')).replace(
Expand Down