Hashtables, dictionaries, and performance

Hashtables and dictionaries are very popular in PowerShell Core. There are many cmdlets that you have already seen, such as Group-Object or Get-WinEvent, which work with hashtables. Hashtables are found when using splatting, and a special dictionary is used for the automatic variable, PSDefaultParameterValues, which defines key-value pairs for cmdlets and their defaults.

This recipe will show you another reason for preferring hashtables over other constructions: speed.

Getting ready

Install and start PowerShell Core. This recipe assumes you are using the ActiveDirectory module, either directly on PACKT-DC1 or imported from it.

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