performance measurements
Each table row shows performance measurements for this Nuitka program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 550 | 2.61 | 0.70 | 58,040 | 575 | 46% 53% 41% 30% 38% 67% 55% 64% |
Read the ↓ make, command line, and program output logs to see how this program was run.
Read spectral-norm benchmark to see what this program should do.
notes
spectral-norm Nuitka #5 program source code
# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org/
# Contributed by Sebastien Loisel
# Fixed by Isaac Gouy
# Sped up by Josh Goldfoot
# Dirtily sped up by Simon Descarpentries
# Concurrency by Jason Stitt
# 2to3
from multiprocessing import Pool
from math import sqrt
from sys import argv
def eval_A (i, j):
return 1.0 / ((i + j) * (i + j + 1) / 2 + i + 1)
def eval_A_times_u (u):
args = ((i,u) for i in range(len(u)))
return pool.map(part_A_times_u, args)
def eval_At_times_u (u):
args = ((i,u) for i in range(len(u)))
return pool.map(part_At_times_u, args)
def eval_AtA_times_u (u):
return eval_At_times_u (eval_A_times_u (u))
def part_A_times_u(xxx_todo_changeme):
(i,u) = xxx_todo_changeme
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A (i, j) * u_j
return partial_sum
def part_At_times_u(xxx_todo_changeme1):
(i,u) = xxx_todo_changeme1
partial_sum = 0
for j, u_j in enumerate(u):
partial_sum += eval_A (j, i) * u_j
return partial_sum
def main():
n = int(argv[1])
u = [1] * n
for dummy in range (10):
v = eval_AtA_times_u (u)
u = eval_AtA_times_u (v)
vBv = vv = 0
for ue, ve in zip (u, v):
vBv += ue * ve
vv += ve * ve
print("%0.9f" % (sqrt(vBv/vv)))
pool = Pool(processes=4)
main()
make, command-line, and program output logs
Sun, 23 Apr 2023 09:39:34 GMT MAKE: make[1]: Vstupuje se do adresáře „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“ nuitka3 --remove-output spectralnorm.nuitka-5.nuitka Nuitka-Options:INFO: Used command line options: --remove-output spectralnorm.nuitka-5.nuitka Nuitka-Options:WARNING: You did not specify to follow or include anything but main program. Check options and make sure that is intended. Nuitka:INFO: Starting Python compilation with Nuitka '1.5' on Python '3.10' commercial grade 'not installed'. Nuitka-Plugins:INFO: multiprocessing: Injecting pre-module load code for module 'multiprocessing': Nuitka-Plugins:INFO: multiprocessing: Monkey patching "multiprocessing" load environment. Nuitka-Plugins:INFO: multiprocessing: Injecting post-module load code for module 'multiprocessing': Nuitka-Plugins:INFO: multiprocessing: Monkey patching "multiprocessing" for compiled methods. Nuitka:INFO: Completed Python level compilation and optimization. Nuitka:INFO: Generating source code for C backend compiler. Nuitka:INFO: Running data composer tool for optimal constant value handling. Nuitka:INFO: Running C compilation via Scons. Nuitka-Scons:INFO: Backend C compiler: gcc (gcc). Nuitka-Scons:INFO: Backend linking program with 10 files (no progress information available). Nuitka-Scons:WARNING: You are not using ccache. Nuitka:INFO: Removing build directory 'spectralnorm.nuitka-5.nuitka.build'. Nuitka:INFO: Successfully created 'spectralnorm.nuitka-5.nuitka.bin'. cp spectralnorm.nuitka-5.nuitka.bin spectralnorm.nuitka-5.nuitka_run make[1]: Opouští se adresář „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“ 19.09s to complete and log all make actions COMMAND LINE: ./spectralnorm.nuitka-5.nuitka_run 550 PROGRAM OUTPUT: 1.274224125 Exception ignored in: <function Pool.__del__ at 0x7f22b3161900> Traceback (most recent call last): File "/usr/lib/python3.10/multiprocessing/pool.py", line 271, in __del__ File "/usr/lib/python3.10/multiprocessing/queues.py", line 377, in put File "/usr/lib/python3.10/multiprocessing/connection.py", line 200, in send_bytes File "/usr/lib/python3.10/multiprocessing/connection.py", line 400, in _send_bytes AttributeError: 'NoneType' object has no attribute 'pack'