performance measurements
Each table row shows performance measurements for this program with a particular command-line input value N.
| N | CPU secs | Elapsed secs | Memory KB | Code B | ≈ CPU Load |
|---|---|---|---|---|---|
| 550 | 0.10 | 0.11 | ? | 394 | 8% 0% 91% 0% 0% 0% 0% 0% |
Read the ↓ make, command line, and program output logs to see how this program was run.
Read benchmark to see what this program should do.
notes
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
# Sped up with numpy by Kittipong Piyawanno
# 2to3
from sys import argv
from numpy import *
def spectralnorm(n):
u = matrix(ones(n))
j = arange(n)
eval_func = lambda i : 1.0 / ((i + j) * (i + j + 1) / 2 + i + 1)
M = matrix([eval_func(i) for i in arange(n)])
MT = M.T
for i in range (10):
v = (u*MT)*M
u = (v*MT)*M
print("%0.9f" % (sum(u*v.T)/sum(v*v.T))**0.5)
spectralnorm(int(argv[1]))
make, command-line, and program output logs
Sun, 23 Apr 2023 09:40:15 GMT MAKE: make[1]: Vstupuje se do adresáře „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“ nuitka3 --remove-output spectralnorm.nuitka-2.nuitka Nuitka-Options:INFO: Used command line options: --remove-output spectralnorm.nuitka-2.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: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 7 files (no progress information available). Nuitka-Scons:WARNING: You are not using ccache. Nuitka:INFO: Removing build directory 'spectralnorm.nuitka-2.nuitka.build'. Nuitka:INFO: Successfully created 'spectralnorm.nuitka-2.nuitka.bin'. cp spectralnorm.nuitka-2.nuitka.bin spectralnorm.nuitka-2.nuitka_run make[1]: Opouští se adresář „/home/dundee/work/pybenchmarks/bencher/tmp/spectralnorm/tmp“ 14.33s to complete and log all make actions COMMAND LINE: ./spectralnorm.nuitka-2.nuitka_run 550 PROGRAM OUTPUT: 1.274224125