performance measurements
Each table row shows performance measurements for this Python 3 program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 2.99 | 3.03 | 10,512 | 367 | 1% 2% 0% 0% 100% 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
Python 3.3.1 (default, Apr 11 2013, 12:45:45) [GCC 4.7.2] on linux
iobench Python 3 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
Sun, 30 Jul 2023 10:51:11 GMT COMMAND LINE: /usr/bin/python3 iobench.python3 1 PROGRAM OUTPUT NOT CHECKED: <function fread at 0x7f82b21d9080> 100 bytes, 0.31us per write <function fwrite at 0x7f82b21d8f40> 100 bytes, 0.25us per write <function fread at 0x7f82b21d9080> 1000 bytes, 0.38us per write <function fwrite at 0x7f82b21d8f40> 1000 bytes, 0.31us per write <function fread at 0x7f82b21d9080> 10000 bytes, 0.67us per write <function fwrite at 0x7f82b21d8f40> 10000 bytes, 0.38us per write <function file_read at 0x7f82b21d91c0> 100 bytes, 0.09us per write <function file_write at 0x7f82b21d9120> 100 bytes, 0.08us per write <function file_read at 0x7f82b21d91c0> 1000 bytes, 0.53us per write <function file_write at 0x7f82b21d9120> 1000 bytes, 0.35us per write <function file_read at 0x7f82b21d91c0> 10000 bytes, 3.62us per write <function file_write at 0x7f82b21d9120> 10000 bytes, 2.01us per write