performance measurements

Each table row shows performance measurements for this MicroPython program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
5507.027.034,364498  0% 1% 0% 100%
5507.007.014,216498  100% 0% 0% 0%
5507.007.014,396498  0% 100% 1% 0%

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 MicroPython #6 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
# Used list comprehension by Vadim Zelenin
# 2to3

from math      import sqrt
from sys       import argv


def eval_A(i, j):
    ij = i+j
    return 1.0 / (ij * (ij + 1) / 2 + i + 1)


def eval_A_times_u(u):
    local_eval_A = eval_A

    return [ sum([ local_eval_A(i, j) * u_j
                   for j, u_j in enumerate(u)
                 ]
                )
             for i in range(len(u))
           ]


def eval_At_times_u(u):
    local_eval_A = eval_A

    return [ sum([ local_eval_A(j, i) * u_j
                   for j, u_j in enumerate(u)
                 ]
                )
             for i in range(len(u))
           ]


def eval_AtA_times_u(u):
    return eval_At_times_u(eval_A_times_u(u))


def main():
    n = int(argv[1])
    u = [1] * n
    local_eval_AtA_times_u = eval_AtA_times_u

    for dummy in range(10):
        v = local_eval_AtA_times_u(u)
        u = local_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)))

main()

 make, command-line, and program output logs

Tue, 29 Jan 2019 18:06:18 GMT

COMMAND LINE:
/usr/bin/micropython spectralnorm.micropython-6.micropython 550

PROGRAM OUTPUT:
1.274224125

Revised BSD license

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