mirror of
https://github.com/fleschutz/PowerShell.git
synced 2024-11-22 07:53:21 +01:00
99 lines
2.8 KiB
Markdown
99 lines
2.8 KiB
Markdown
Script: *measure-InsertionSort.ps1*
|
|
========================
|
|
|
|
This PowerShell script measures the speed of the InsertionSort algorithm.
|
|
InsertionSort is a simple sorting algorithm that builds the final sorted array (or list)
|
|
one item at a time. It is much less efficient on large lists than more advanced algorithms
|
|
such as quicksort, heapsort, or merge sort.
|
|
|
|
Parameters
|
|
----------
|
|
```powershell
|
|
PS> ./measure-InsertionSort.ps1 [[-numIntegers] <Int32>] [<CommonParameters>]
|
|
|
|
-numIntegers <Int32>
|
|
Specifies the number of integers to sort
|
|
|
|
Required? false
|
|
Position? 1
|
|
Default value 1000
|
|
Accept pipeline input? false
|
|
Accept wildcard characters? false
|
|
|
|
[<CommonParameters>]
|
|
This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction,
|
|
WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
|
|
```
|
|
|
|
Example
|
|
-------
|
|
```powershell
|
|
PS> ./measure-InsertionSort.ps1
|
|
🧭 0.423 sec to sort 1000 integers by InsertionSort
|
|
|
|
```
|
|
|
|
Notes
|
|
-----
|
|
Author: Markus Fleschutz | License: CC0
|
|
|
|
Related Links
|
|
-------------
|
|
https://github.com/fleschutz/PowerShell
|
|
|
|
Script Content
|
|
--------------
|
|
```powershell
|
|
<#
|
|
.SYNOPSIS
|
|
Measures the speed of InsertionSort
|
|
.DESCRIPTION
|
|
This PowerShell script measures the speed of the InsertionSort algorithm.
|
|
InsertionSort is a simple sorting algorithm that builds the final sorted array (or list)
|
|
one item at a time. It is much less efficient on large lists than more advanced algorithms
|
|
such as quicksort, heapsort, or merge sort.
|
|
.PARAMETER numIntegers
|
|
Specifies the number of integers to sort
|
|
.EXAMPLE
|
|
PS> ./measure-InsertionSort.ps1
|
|
🧭 0.423 sec to sort 1000 integers by InsertionSort
|
|
.LINK
|
|
https://github.com/fleschutz/PowerShell
|
|
.NOTES
|
|
Author: Markus Fleschutz | License: CC0
|
|
#>
|
|
|
|
param([int]$numIntegers = 1000)
|
|
|
|
class InsertionSort {
|
|
static Sort($targetList) {
|
|
$n = $targetList.count
|
|
|
|
for ($i = 0; $i -lt $n - 1; $i++) {
|
|
$j = $i + 1
|
|
|
|
while ($j -gt 0) {
|
|
|
|
if ($targetList[$j - 1] -gt $targetList[$j]) {
|
|
$temp = $targetList[$j - 1]
|
|
$targetList[$j - 1] = $targetList[$j]
|
|
$targetList[$j] = $temp
|
|
}
|
|
|
|
$j--
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
$list = (1..$numIntegers | foreach{Get-Random -minimum 1 -maximum $numIntegers})
|
|
$stopWatch = [system.diagnostics.stopwatch]::startNew()
|
|
[InsertionSort]::Sort($list)
|
|
[float]$elapsed = $stopWatch.Elapsed.TotalSeconds
|
|
$elapsed3 = "{0:N3}" -f $elapsed # formatted to 3 decimal places
|
|
"🧭 $elapsed3 sec to sort $numIntegers integers by InsertionSort"
|
|
exit 0 # success
|
|
```
|
|
|
|
*(generated by convert-ps2md.ps1 using the comment-based help of measure-InsertionSort.ps1 as of 05/19/2024 10:25:23)*
|