cpython/Tools/scripts/startuptime.py

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# Quick script to time startup for various binaries
import subprocess
import sys
import time
NREPS = 100
def main():
binaries = sys.argv[1:]
for bin in binaries:
t0 = time.time()
for _ in range(NREPS):
result = subprocess.run([bin, "-c", "pass"])
result.check_returncode()
t1 = time.time()
print(f"{(t1-t0)/NREPS:6.3f} {bin}")
if __name__ == "__main__":
main()