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by hyperman1
300 days ago
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I've got a nice one recently: A pipeline has bytes being transformed to chars by a user selectable encoding, then the chars go to a next step. In an AOT language, this must be dynamic dispatch, as there are multiple algorithms. The JDK, however, notices how the encoding is basically always UTF-8 and does an 'if utf8 then do utf8code else do dynamic dispatch'. Then the inliner comes along, pushes that if outside a loop, and merges the byte reading, encoding and char processing to 1 big code block, all optimized together. |
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