rescript-lang / rescript-lang/rescript

Optimize option chaining

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#7,457 0 comments 6 reactions 1 assignee View on GitHub

@cknitt is already working on this.

Since Dec 4, 2025.

enhancement
Dominant language
OCaml
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Merged PRs (30d)
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Description

There is currently a performance penalty due to the extra function call when using Option.map/flatMap/forEach instead of a switch statement.

The compiler could optimize/inline these calls. (Same for Null/Nullable actually, but less important IMHO as Option is more widely used.)

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