PowerShell/Community-Blog

Update request-How long does it take to run a script

doctordns opened this issue · 7 comments

doctordns commented

I often see queries about low long it takes for a script or script block to run.

Summary of the update request

Cover subtracting two DateTime objects to get duration
Also should cover Measure-command

Cover Get-Date and timespan objects.

farismalaeb commented

Hi,
Is this post available for pickup?

doctordns commented

Yes - please consider another post!!

Kagre commented

also worth noting that .ticks will sometimes not increment

PS> $x=[datetime]::now.ticks; 1..100 | %{$x - ($x = [datetime]::now.ticks)}
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-156207
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Kagre commented

This one seems more believable

PS> $sw = [System.Diagnostics.Stopwatch]::new()
PS> $x=0;$sw.reset();$sw.start(); 1..100 | %{$x - ($x = $sw.elapsed.ticks)};$sw.Stop();$sw.Elapsed
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Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 0
Milliseconds      : 68
Ticks             : 680952
TotalDays         : 7.88138888888889E-07
TotalHours        : 1.89153333333333E-05
TotalMinutes      : 0.00113492
TotalSeconds      : 0.0680952
TotalMilliseconds : 68.0952
FranciscoNabas commented

Is this post already taken? If not I can work on it.

sdwheeler commented

Is this post already taken? If not I can work on it.

This is open for anyone. I would show how to use Measure-Command. There are several examples in https://learn.microsoft.com/powershell/scripting/dev-cross-plat/performance/script-authoring-considerations

FranciscoNabas commented

Definitely, and maybe an extra function to get the time it took plus the execution result.
I'll start working on it.