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 | 3.38 | 3.39 | 8,140 | 367 | 51% 26% 22% 19% 76% 17% 18% 16% |
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
Thu, 03 Dec 2020 23:04:51 GMT COMMAND LINE: /usr/bin/python3 iobench.python3 1 PROGRAM OUTPUT NOT CHECKED: <function fread at 0x7f88cbf51ee0> 100 bytes, 0.40us per write <function fwrite at 0x7f88cbf51e50> 100 bytes, 0.38us per write <function fread at 0x7f88cbf51ee0> 1000 bytes, 0.58us per write <function fwrite at 0x7f88cbf51e50> 1000 bytes, 0.48us per write <function fread at 0x7f88cbf51ee0> 10000 bytes, 0.86us per write <function fwrite at 0x7f88cbf51e50> 10000 bytes, 0.47us per write <function file_read at 0x7f88cbf64040> 100 bytes, 0.12us per write <function file_write at 0x7f88cbf51f70> 100 bytes, 0.11us per write <function file_read at 0x7f88cbf64040> 1000 bytes, 0.52us per write <function file_write at 0x7f88cbf51f70> 1000 bytes, 0.27us per write <function file_read at 0x7f88cbf64040> 10000 bytes, 3.04us per write <function file_write at 0x7f88cbf51f70> 10000 bytes, 0.82us per write