PowerShell CIM Sessions: Efficient Multi-Server Queries
Opening a new CIM connection for every query is expensive. CimSession objects persist connections, enabling fast batched queries across many servers with significant overhead
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PowerShell Pipeline: Where-Object vs .Where() Method Performance
The .Where() method on collections is significantly faster than Where-Object for in-memory arrays. This post benchmarks both and shows when to switch for real performance gains.
PowerShell Compare-Object Internals: Advanced Diffing Techniques
Compare-Object is one of PowerShell’s most misunderstood cmdlets. SyncWindow, PassThru, and multi-property diffing unlock powerful use cases for configuration drift detection.
PowerShell 7 Pipeline Chain Operators: && and || Explained
PowerShell 7 introduced && and || operators borrowed from POSIX shells. They look familiar but behave differently — especially around non-terminating errors. Here is what you
PowerShell .NET Classes: Use the Full .NET Framework
PowerShell runs on .NET and can use any .NET class directly. Learn to access System.IO, System.Net, and other namespaces for advanced scripting.
PowerShell Tee-Object: Split Pipeline to Screen and File
Tee-Object splits pipeline output to both the console and a file at the same time. Learn to use it for live display plus logging in your scripts.
PowerShell Out-GridView: Interactive Data Explorer
Out-GridView opens an interactive table where you can sort, filter, and select data. Learn -PassThru to feed selected rows back into the pipeline.
PowerShell ConvertFrom-Csv: Parse CSV Text Without a File
ConvertFrom-Csv parses CSV strings into objects without needing a file. Learn to use it for API responses, command output, and in-memory data manipulation.
PowerShell Format-Table and Format-List: Display Data Clearly
Format-Table and Format-List control how PowerShell displays output in the console. Learn column customization, auto-size, and why they end pipelines.
PowerShell Pipeline Optimization: Speed Up Slow Scripts
Slow PowerShell scripts are often fixed with a few pipeline tweaks. Learn to filter early, avoid repeated cmdlet calls, and use method syntax for speed.
