Document optimizations enabled by FusedIterator #55896
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When reading this I wondered what “some significant optimizations” referred to. As far as I can tell, the specialization of `.fuse()` is the only case where `FusedIterator` has any impact at all. Is this accurate @Stebalien?
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r? @shepmaster (rust_highfive has picked a reviewer for you, use r? to override) |
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Yes, this is correct. |
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@bors r+ |
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📌 Commit 4da9f10 has been approved by |
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@bors rollup |
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Document optimizations enabled by FusedIterator When reading this I wondered what “some significant optimizations” referred to. As far as I can tell from reading code, the specialization of `.fuse()` is the only case where `FusedIterator` has any impact at all. Is this accurate @Stebalien?
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Rollup of 20 pull requests Successful merges: - #55136 (Remove short doc where it starts with a codeblock) - #55711 (Format BtreeMap::range_mut example) - #55722 (impl_stable_hash_for: support enums and tuple structs with generic parameters) - #55754 (Avoid converting bytes to UTF-8 strings to print, just pass bytes to stdout/err) - #55804 (rustdoc: don't inline `pub use some_crate` unless directly asked to) - #55805 (Move `static_assert!` into librustc_data_structures) - #55837 (Make PhantomData #[structural_match]) - #55840 (Fix TLS errors when downloading stage0) - #55843 (add FromIterator<A> to Box<[A]>) - #55858 (Small fixes on code blocks in rustdoc) - #55863 (Fix a typo in std::panic) - #55870 (Fix typos.) - #55874 (string: Add documentation for `From` impls) - #55879 (save-analysis: Don't panic for macro-generated use globs) - #55882 (Reference count `crate_inherent_impls`s return value.) - #55888 (miri: for uniformity, also move memory_deallocated to AllocationExtra) - #55889 (global allocators: add a few comments) - #55896 (Document optimizations enabled by FusedIterator) - #55905 (Change `Lit::short_name` to `Lit::literal_name`.) - #55908 (Fix their/there grammar nit)
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Upon stabilization of FuseIterator, we talked about the possibility of the trait becoming a dud in the future, so the docs should allow for that in some way. #47463 So I guess that's on me, that should have been in that stabilization PR. |
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What does "dud" mean? |
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That it can't enable any optimizations (due to specialization being removed again), so it becomes useless for |
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When reading this I wondered what “some significant optimizations” referred to. As far as I can tell from reading code, the specialization of
.fuse()is the only case whereFusedIteratorhas any impact at all. Is this accurate @Stebalien?