test_json.py

import time
import json
import math
import subprocess

LOOPS = 1000

def main():
    times = []
    for i in range(1):
        start = time.time()
        for n in range(LOOPS):
            tmp = json.loads('{"res": "ok"}')
            #tmp = json.load(open("/Users/sgross/Downloads/large-file.json", "r"))
        end = time.time()
        times.append((end - start) / LOOPS * 1e9)
        print((end - start) / LOOPS * 1e9)

main()

test_json_repeat.py

import time
import json
import math
import subprocess
import sys

if len(sys.argv) > 1:
    N = int(sys.argv[1])
else:
    N = 500

def main():
    times = []

    for _ in range(N):
        v = subprocess.run(["./python.exe", "test_json.py"], capture_output=True)
        res = v.stdout.decode('utf-8').strip()
        times.append(float(res))

    minimum = min(times)
    maximum = max(times)
    avg = sum(times)/N
    var = sum((x - avg)**2 for x in times) / N
    stddev = math.sqrt(var)

    print(f"{minimum=}")
    print(f"{maximum=}")
    print(f"{avg=} +/- {stddev=}")

main()

./python.exe test_json_repeat.py 500

BEFORE:

minimum=761.0321044921875
maximum=960.1116180419922
avg=781.9304466247559 +/- stddev=22.09558416016643

AFTER:

minimum=771.7609405517578
maximum=972.9862213134767
avg=788.0878448486328 +/- stddev=19.02220149366413