Re: nytprof Profiler gives diverse results

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Re^2: nytprof Profiler gives diverse results by stevieb (Canon) on Apr 04, 2020 at 19:40 UTC
Is your software available as a distribution that can be reasonably easily installed? I don't write Perl code on Windows, but I do write a single piece of Windows software for Perl, and since I'm a test-first-mentality type, I have several minimalistic Windows VMs for testing on, and I'll gladly give your code a spin against these extremely stable systems if you want to see the variances against machines that are designed and designated for doing these kinds of things. Let me know.	[reply]
Re^3: nytprof Profiler gives diverse results by boleary (Scribe) on Apr 06, 2020 at 12:31 UTC
Thanks for the offer! I could provide you a zip file with all the necessary code to run the test but I don't think its needed. I distribute this code as an executable (which extracts perl locally and then runs it) Unfortunately the code will be run on general purpose laptops/desktops, where I have no control over what is stealing cycles from my process One of the worst cases I encounter is when I am demoing this code to a prospective customer on a web-Ex And that really seems to slow the whole process down tremendously I also distribute this on linux and have been playing with the profiling there to get a more stable result That VM does give better results varying by 1 or 2 seconds. Although the very useful nytprofhtml is not working for me on that VM :) I guess one thing I was hoping someone might tell me that there is a way to run the perl code as a higher priority windows task	[reply]
Re^2: nytprof Profiler gives diverse results by Anonymous Monk on Apr 04, 2020 at 21:02 UTC
You gotta spin up the laptops, I do `perl -le" $fo++ while 1"` before doing long benchmarks, and wait until the fans start hissing, otherwise first runner is always slower ...	[reply] [d/l]
Re^3: nytprof Profiler gives diverse results by boleary (Scribe) on Apr 05, 2020 at 14:10 UTC
Interesting... Then you ctrl-c the perl -le and run the actual code?	[reply]
Re^2: nytprof Profiler gives diverse results by boleary (Scribe) on Apr 07, 2020 at 10:59 UTC
I found this interesting nugget to enable win10 ultimate-performance-mode on my laptop... https://www.windowslatest.com/2018/04/20/enable-ultimate-performance-mode-in-windows-10 it makes my laptop fan stay on... It did not help the code execution time while I had a browser open I will try with the browser closed. Not too much of a difference with browser closed What really helped to stabilize my results was Turning OFF WIFI Even then... There is still too much variance to determine if a new looping structure using a large pre-processed list is better than 2 loops that created the same list on the fly (using foreach and keys) I will look more into Benchmark as suggested by bliako	[reply]