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* YJIT: Specialize `String#[]` (`String#slice`) with fixnum arguments String#[] is in the top few C calls of several YJIT benchmarks: liquid-compile rubocop mail sudoku This speeds up these benchmarks by 1-2%. * YJIT: Try harder to get type info for `String#[]` In the large generated code of the mail gem the context doesn't have the type info. In that case if we peek at the stack and add a guard we can still apply the specialization and it speeds up the mail benchmark by 5%. Co-authored-by: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com> Co-authored-by: Takashi Kokubun (k0kubun) <takashikkbn@gmail.com> --------- Co-authored-by: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com> Co-authored-by: Takashi Kokubun (k0kubun) <takashikkbn@gmail.com> |
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