performance measurements
Each table row shows performance measurements for this Jython program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 1 | 286.89 | 270.09 | 3,620 | 370 | 19% 26% 30% 27% 1% 1% 1% 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 Jython 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, 30 Oct 2020 19:20:15 GMT COMMAND LINE: /usr/bin/jython iobench.jython 1 PROGRAM OUTPUT NOT CHECKED: fread 100 bytes, 0.54us per write fwrite 100 bytes, 0.89us per write fread 1000 bytes, 1.52us per write fwrite 1000 bytes, 4.79us per write fread 10000 bytes, 12.63us per write fwrite 10000 bytes, 46.79us per write file_read 100 bytes, 0.46us per write file_write 100 bytes, 0.57us per write file_read 1000 bytes, 1.58us per write file_write 1000 bytes, 4.61us per write file_read 10000 bytes, 12.64us per write file_write 10000 bytes, 46.07us per write