The Computer Language
Benchmarks Game

Perl versus Python 3 fastest programs

Back in April 2010, Russ Cox charitably suggested that only fannkuch-redux, fasta, k-nucleotide, mandlebrot, nbody, reverse-complement and spectral-norm were close to fair comparisons. As someone who implemented programming languages, his interest was "measuring the quality of the generated code when both compilers are presented with what amounts to the same program."

Differences in approach - to memory management, parallel programming, regex, arbitrary precision arithmetic, implementation technique - don't fit in that kind-of fair comparison — but we still have to deal with them.

These are only the fastest programs. There may be additional measurements for programs which seem more-like a fair comparison to you. Always look at the source code.

spectral-norm
source secs mem gz busy cpu load
Perl 38.15 11,784 555 146.68 95% 97% 95% 97%
Python 3 169.87 49,188 417 675.02 100% 99% 99% 99%
reverse-complement
source secs mem gz busy cpu load
Perl 10.50 1,494,784 287 10.62 0% 0% 1% 100%
Python 3 16.93 1,777,852 434 17.58 78% 21% 4% 0%
k-nucleotide
source secs mem gz busy cpu load
Perl 56.62 1,069,148 476 190.22 70% 86% 87% 93%
Python 3 72.24 199,856 1967 275.38 94% 94% 96% 96%
n-body
source secs mem gz busy cpu load
Perl 735.92 6,292 1429 744.19 96% 0% 0% 4%
Python 3 865.18 8,176 1196 874.96 2% 20% 79% 0%
regex-redux
source secs mem gz busy cpu load
Perl 16.39 157,044 820 46.71 81% 60% 85% 59%
Python 3 18.45 457,340 512 37.52 69% 37% 50% 48%
fannkuch-redux
source secs mem gz busy cpu load
Perl 561.62 11,872 570 2,239.50 100% 100% 100% 100%
Python 3 534.40 47,236 950 2,104.05 99% 97% 99% 99%
pidigits
source secs mem gz busy cpu load
Perl 3.69 8,300 261 3.80 1% 1% 1% 100%
Python 3 3.47 10,356 386 3.53 1% 1% 0% 100%
fasta
source secs mem gz busy cpu load
Perl 90.15 54,920 871 91.86 20% 1% 1% 80%
Python 3 63.55 844,180 1947 129.71 40% 71% 33% 61%
binary-trees
source secs mem gz busy cpu load
Perl 172.50 2,200,640 648 573.15 72% 87% 73% 100%
Python 3 80.30 448,004 589 286.50 95% 87% 87% 88%
mandelbrot
source secs mem gz busy cpu load
Perl 687.48 44,096 586 2,749.07 100% 100% 100% 100%
Python 3 259.50 48,192 688 1,036.70 100% 100% 100% 100%
Perl

This is perl 5, version 30, subversion 0 (v5.30.0)
built for x86_64-linux-thread-multi

Python 3

Python 3.8.0