small iter.intersperse.fold() optimization #142549
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No need to call into fold when the first item is already None, this avoids some redundant work for empty iterators. "But it uses Fuse" one might want to protest, but Fuse is specialized and may call into the inner iterator anyway.
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@bors r+ rollup |
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…tgross35 small iter.intersperse.fold() optimization No need to call into fold when the first item is already None, this avoids some redundant work for empty iterators. "But it uses Fuse" one might want to protest, but Fuse is specialized and may call into the inner iterator anyway.
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Rollup of 17 pull requests Successful merges: - #124595 (Suggest cloning `Arc` moved into closure) - #139594 (Simplify `ObligationCauseCode::IfExpression`) - #141311 (make `tidy-alphabetical` use a natural sort) - #141648 ([rustdoc] Do not emit redundant_explicit_links lint if the doc comment comes from expansion) - #142255 (Add edition checks for some tests that had divergent output) - #142285 (tests: Do not run afoul of asm.validity.non-exhaustive in input-stats) - #142549 (small iter.intersperse.fold() optimization) - #142637 (Remove some glob imports from the type system) - #142647 ([perf] Compute hard errors without diagnostics in impl_intersection_has_impossible_obligation) - #142700 (Remove incorrect comments in `Weak`) - #142884 (StableMIR: Add method to retrieve body of coroutine) - #142925 (Rewrite `.gitattributes` CRLF ui tests into run-make tests) - #143001 (Rename run always ) - #143010 (Update `browser-ui-test` version to `0.20.7`) - #143015 (Add `sym::macro_pin` diagnostic item for `core::pin::pin!()`) - #143020 (codegen_fn_attrs: make comment more precise) - #143033 (Expand const-stabilized API links in relnotes) r? `@ghost` `@rustbot` modify labels: rollup
matthiaskrgr
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…tgross35 small iter.intersperse.fold() optimization No need to call into fold when the first item is already None, this avoids some redundant work for empty iterators. "But it uses Fuse" one might want to protest, but Fuse is specialized and may call into the inner iterator anyway.
compiler-errors
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…tgross35 small iter.intersperse.fold() optimization No need to call into fold when the first item is already None, this avoids some redundant work for empty iterators. "But it uses Fuse" one might want to protest, but Fuse is specialized and may call into the inner iterator anyway.
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No need to call into fold when the first item is already None, this avoids some redundant work for empty iterators.
"But it uses Fuse" one might want to protest, but Fuse is specialized and may call into the inner iterator anyway.