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A comment on “Clean” Code, Horrible Performance. Parent comment

Re:“Clean” Code, Horrible Performance by jimbokun on Tuesday February 28, 2023 @10:02PM (#34978250)
Interesting. Is there something about JS semantics that prevents JS engine writers from better optimizing that pattern?
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Re:“Clean” Code, Horrible Performance by Veliladon on Wednesday March 01, 2023 @12:46AM (#34979189)
Short answer: JavaScript arrays are sparse and untyped.
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