performance measurements
Each table row shows performance measurements for this PyPy program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 14.73 | 14.73 | 80,864 | 370 | 0% 0% 100% 0% 0% 0% 1% 0% |
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 PyPy program source code
import os, time
def measure(func, num1, num2):
t0 = time.time()
func(num1, num2)
print func.__code__.co_name, "%d bytes, %.2fus per write" % (
num2, (time.time() - t0) / num1 * 1000 * 1000)
def fwrite(num, num2):
fd = os.open("/dev/null", os.O_WRONLY)
for i in xrange(num):
os.write(fd, " " * num2)
def fread(num, num2):
fd = os.open("/dev/full", os.O_RDONLY)
for i in xrange(num):
os.read(fd, num2)
def file_write(num, num2):
f = open("/dev/null", "w")
for i in xrange(num):
f.write(" " * num2)
f.flush()
def file_read(num, num2):
f = open("/dev/full")
for i in xrange(num):
f.read(num2)
if __name__ == '__main__':
measure(fread, 10000000, 100)
measure(fwrite, 10000000, 100)
measure(fread, 10000000, 1000)
measure(fwrite, 10000000, 1000)
measure(fread, 1000000, 10000)
measure(fwrite, 1000000, 10000)
measure(file_read, 10000000, 100)
measure(file_write, 10000000, 100)
measure(file_read, 10000000, 1000)
measure(file_write, 10000000, 1000)
measure(file_read, 1000000, 10000)
measure(file_write, 1000000, 10000)
make, command-line, and program output logs
Fri, 09 Sep 2022 06:01:49 GMT COMMAND LINE: /usr/bin/pypy iobench.pypy 1 PROGRAM OUTPUT NOT CHECKED: fread 100 bytes, 0.24us per write fwrite 100 bytes, 0.16us per write fread 1000 bytes, 0.29us per write fwrite 1000 bytes, 0.16us per write fread 10000 bytes, 0.71us per write fwrite 10000 bytes, 0.16us per write file_read 100 bytes, 0.05us per write file_write 100 bytes, 0.03us per write file_read 1000 bytes, 0.17us per write file_write 1000 bytes, 0.07us per write file_read 10000 bytes, 1.74us per write file_write 10000 bytes, 0.37us per write