ROSLYN.PERFORMANCE.CA1833 : Use AsSpan or AsMemory instead of Range-based indexers for getting Span of an array (C#)

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ROSLYN.PERFORMANCE.CA1833 : Use AsSpan or AsMemory instead of Range-based indexers for getting Span of an array (C#)

Summary

The Range-based indexer on array values produces a copy of requested portion of the array. This copy is often unwanted when it is implicitly used as a Span or Memory value. Use the AsSpan method to avoid the copy.

This check corresponds to Roslyn rule CA1833. For full rule details, see the Microsoft website: CA1833.

Properties

Class Name	Use AsSpan or AsMemory instead of Range-based indexers for getting Span of an array (C#)
Significance	reliability
Mnemonic	ROSLYN.PERFORMANCE.CA1833
Categories	None
Availability	Available for C# only.
Enabling	Checks for this warning class are enabled by default. To disable them, add the following WARNING_FILTER rule to the project configuration file. WARNING_FILTER += discard class="Use AsSpan or AsMemory instead of Range-based indexers for getting Span of an array (C#)"

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.