performance measurements

Each table row shows performance measurements for this Python 2 program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
5,000,0000.550.567,068407  98% 5% 0% 2%
5,000,0000.550.557,052407  0% 0% 100% 2%
5,000,0000.550.557,060407  100% 4% 0% 0%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read thread-ring benchmark to see what this program should do.

 notes

 thread-ring Python 2 program source code

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org/
#
# contributed by Daniel Nanz 2008-03-11

# Coroutines via enhanced generators
# 2to3

import sys
import itertools
      
def main(n = int(sys.argv[1]), n_threads=503, cycle=itertools.cycle):

    def worker(worker_id):
        
        n = 1
        while True:
            if n > 0:
                n = (yield (n - 1))
            else:
                print(worker_id)
                raise StopIteration


    threadRing = [worker(w) for w in range(1, n_threads + 1)]
    for t in threadRing: foo = next(t)           # start exec. gen. funcs
    sendFuncRing = [t.send for t in threadRing]   # speed...
    for send in cycle(sendFuncRing):
        try:
            n = send(n)
        except StopIteration:
            break

main()

 make, command-line, and program output logs

Wed, 06 Jun 2018 10:03:26 GMT

COMMAND LINE:
/usr/bin/python2 threadring.python 5000000

PROGRAM OUTPUT:
181

Revised BSD license

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