performance measurements
Each table row shows performance measurements for this Python dev program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 2.99 | 3.00 | 8,828 | 367 | 0% 0% 100% 0% 2% 0% 0% 1% |
Read the ↓ make, command line, and program output logs to see how this program was run.
Read iobench benchmark to see what this program should do.
notes
iobench Python dev program source code
import os, time
def measure(func, repetitions, size):
t0 = time.time()
func(repetitions, size)
print(
func,
"%d bytes, %.2fus per write" % (
size,
(time.time() - t0) / repetitions * 1000 * 1000
)
)
def fwrite(repetitions, size):
fd = os.open("/dev/null", os.O_WRONLY)
for i in range(repetitions):
os.write(fd, b" " * size)
def fread(repetitions, size):
fd = os.open("/dev/full", os.O_RDONLY)
for i in range(repetitions):
os.read(fd, size)
def file_write(repetitions, size):
f = open("/dev/null", "w")
for i in range(repetitions):
f.write(" " * size)
f.flush()
def file_read(repetitions, size):
f = open("/dev/full")
for i in range(repetitions):
f.read(size)
if __name__ == '__main__':
measure(fread, 1000000, 100)
measure(fwrite, 1000000, 100)
measure(fread, 1000000, 1000)
measure(fwrite, 1000000, 1000)
measure(fread, 100000, 10000)
measure(fwrite, 100000, 10000)
measure(file_read, 1000000, 100)
measure(file_write, 1000000, 100)
measure(file_read, 1000000, 1000)
measure(file_write, 1000000, 1000)
measure(file_read, 100000, 10000)
measure(file_write, 100000, 10000)
make, command-line, and program output logs
Fri, 09 Sep 2022 06:02:33 GMT COMMAND LINE: /usr/bin/python3.12 iobench.python-dev 1 PROGRAM OUTPUT NOT CHECKED: <function fread at 0x7f9fc6d11260> 100 bytes, 0.30us per write <function fwrite at 0x7f9fc6d102c0> 100 bytes, 0.26us per write <function fread at 0x7f9fc6d11260> 1000 bytes, 0.39us per write <function fwrite at 0x7f9fc6d102c0> 1000 bytes, 0.33us per write <function fread at 0x7f9fc6d11260> 10000 bytes, 0.73us per write <function fwrite at 0x7f9fc6d102c0> 10000 bytes, 0.37us per write <function file_read at 0x7f9fc6d113a0> 100 bytes, 0.08us per write <function file_write at 0x7f9fc6d11300> 100 bytes, 0.07us per write <function file_read at 0x7f9fc6d113a0> 1000 bytes, 0.52us per write <function file_write at 0x7f9fc6d11300> 1000 bytes, 0.35us per write <function file_read at 0x7f9fc6d113a0> 10000 bytes, 3.66us per write <function file_write at 0x7f9fc6d11300> 10000 bytes, 2.01us per write