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cleverca22/random notes on profiling.md

Created January 28, 2019 07:12
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random notes on profiling.md

attrset ? "key" and attrset.key or fallback have nearly equal complexity costs

if attrset ? "key" then attrset.key else fallback is slightly more expensive,

due to being 3 AST nodes (an ExprIf with an ExprOpHasAttr as the condition and then an ExprSelect to extract the "key")

attrset.key or fallback is slightly cheaper, since it is a single AST node (just ExprSelect)

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