windows scripts

_windows_scripts

.

b3sum.py

#! /usr/bin/env python3

import sys
import secrets
import time
import subprocess

assert len(sys.argv) >= 2

start = time.perf_counter()
with open(sys.argv[1], "rb") as f:
    file_size = f.seek(0, 2)

subprocess.run(["b3sum", *sys.argv[1:]], check=True)
end = time.perf_counter()


gb = file_size / 1_000_000_000
duration = end - start
if duration == 0:
    print(f"read {file_size} bytes in 0 seconds")
else:
    print(f"read {gb:.3f} GB in {duration:.3f} seconds ({gb/duration:.3f} GB/s)")

bigfile.py

#! /usr/bin/env python3

import sys
import secrets
import time

assert len(sys.argv) == 3

num_gb = int(sys.argv[1])
assert sys.argv[1] == str(num_gb)

f = open(sys.argv[2], "wb")

start = time.perf_counter()
for _ in range(num_gb * 1_000):
    f.write(secrets.token_bytes(1_000_000))
end = time.perf_counter()

duration = end - start
print(f"wrote {num_gb} GB in {duration:.3f} seconds ({num_gb/duration:.3f} GB/s)")

cat.py

#! /usr/bin/env python3

import sys
import time

assert len(sys.argv) == 2
f = open(sys.argv[1], "rb")

total = 0
start = time.perf_counter()
while True:
    b = f.read(1 << 20)
    total += len(b)
    if len(b) == 0:
        break
end = time.perf_counter()

gb = total / 1_000_000_000
duration = end - start
if duration == 0:
    print(f"read {total} bytes in 0 seconds")
else:
    print(f"read {gb:.3f} GB in {duration:.3f} seconds ({gb/duration:.3f} GB/s)")