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Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules. Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
28 lines
1.2 KiB
Markdown
28 lines
1.2 KiB
Markdown
---
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bc-version: [all]
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domain: performance
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keywords: [case, branch, frequency, control-flow, hot-path]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Order case branches by frequency
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> Contributions welcome — open a PR to refine or extend this article.
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## Description
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AL documentation does not guarantee that a `case` statement uses a linear comparison strategy, so branch frequency alone is not proof of a performance issue. Reordering is justified only when profiling on the target runtime shows that a large, heavily skewed `case` is a material hot path. It is not a default review finding.
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## Best Practice
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After profiling confirms the comparison path matters and the runtime frequency is known, list common branches first without changing the set of handled values, fallback behavior, or branch bodies.
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See sample: [`order-case-branches-by-frequency.good.al`](order-case-branches-by-frequency.good.al).
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## Anti Pattern
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Reordering branches based on assumed frequency without profiling, or changing an `else` arm or handled value while making the optimization. The good and bad forms must differ only in branch order.
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See sample: [`order-case-branches-by-frequency.bad.al`](order-case-branches-by-frequency.bad.al).
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