[issue30080] Add the --duplicate option for timeit

2022-03-16 Thread Serhiy Storchaka 


Change by Serhiy Storchaka :


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resolution:  -> rejected
stage: patch review -> resolved
status: open -> closed

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[issue30080] Add the --duplicate option for timeit

2017-06-07 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Ah, I even didn't know that "perf timeit" supports -n since it doesn't report 
the number of loops. And seems it runs the benchmark much more times, since 
even with -n1 it is slow. If the number of loops is determined automatically, 
it would do not matter.

I choose the meaning of --duplicate so that it almost not affect the total time 
of the benchmarking. Larger value just decreases the overhead of the iteration.

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[issue30080] Add the --duplicate option for timeit

2017-06-07 Thread STINNER Victor 

STINNER Victor added the comment:

About the command line interface, I would expect that "timeit -n 10 --duplicate 
10 STMT" would run STMT 100 times. I chose this behaviour in perf timeit:
http://perf.readthedocs.io/en/latest/cli.html#timeit-cmd


Current behaviour chosen by Serhiy, -n3 --duplicate=3 runs STMT 3 times:

$ ./python -m timeit --duplicate=3 -r 1 -n 3 'print("bla")'
bla
bla
bla
3 loops, best of 1: 21.8 usec per loop

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[issue30080] Add the --duplicate option for timeit

2017-05-03 Thread Serhiy Storchaka 

Changes by Serhiy Storchaka :


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assignee:  -> serhiy.storchaka

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[issue30080] Add the --duplicate option for timeit

2017-04-16 Thread Guido van Rossum 

Changes by Guido van Rossum :


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nosy:  -Guido.van.Rossum, gvanrossum

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[issue30080] Add the --duplicate option for timeit

2017-04-16 Thread Raymond Hettinger 

Raymond Hettinger added the comment:

+1 I've long used this technique when timing fast statements.  See 
https://code.activestate.com/recipes/577834 for an example.

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[issue30080] Add the --duplicate option for timeit

2017-04-16 Thread Armin Rigo 

Changes by Armin Rigo :


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nosy:  -arigo

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[issue30080] Add the --duplicate option for timeit

2017-04-16 Thread Serhiy Storchaka 

Changes by Serhiy Storchaka :


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pull_requests: +1290

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[issue30080] Add the --duplicate option for timeit

2017-04-16 Thread Serhiy Storchaka 

New submission from Serhiy Storchaka:

One of the most used by me option of the "perf timeit" subcommand is 
--duplicate. It duplicates statements to reduce the overhead of the loop. This 
is necessary when measure the time of very fast statements. Proposed patch adds 
this option for CLI of the timeit module.

Similar feature already was proposed in issue21988, but it automatically 
duplicated statements if they executed too fast. This patch does this only on 
explicit request. And it affects only command-line interface. You need to 
duplicate statements manually when use programming interface.

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components: Demos and Tools, Library (Lib)
messages: 291736
nosy: Guido.van.Rossum, alex, arigo, georg.brandl, gvanrossum, haypo, haypo, 
pitrou, r.david.murray, rhettinger, serhiy.storchaka, steven.daprano, tim.peters
priority: normal
severity: normal
stage: patch review
status: open
title: Add the --duplicate option for timeit
type: enhancement
versions: Python 3.7

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