First specialization #123
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First specialization #123
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nox
reviewed
Aug 27, 2018
lib.rs
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| #[cfg(feature = "specialization")] | ||
| #[inline] | ||
| default fn from(slice: &'a [A::Item]) -> SmallVec<A> { |
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Doesn't that mean that one can specialise the implementation from outside the crate? Shouldn't we be specialising an internal trait used by this impl?
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I'll add an internal SpecFrom trait then.
I added a new `specialization` feature that will specialize `From<&[_: Copy]>` to use `from_slice`, which offers a nice performance boost. Alas, I could not get any measurable perf improvement on `insert_many` or `extend`, so I'll leave them out for now.
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This should now be ready for merging. |
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@bors-servo r+ |
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📌 Commit 49c43d0 has been approved by |
bors-servo
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Aug 30, 2018
First specialization I added a new `specialization` feature that will specialize `From<&[_: Copy]>` to use `from_slice`, which offers a nice performance boost. Alas, I could not get any measurable perf improvement on `insert_many` or `extend` yet, so I'll leave them out for now. <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/rust-smallvec/123) <!-- Reviewable:end -->
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☀️ Test successful - status-travis |
Merged
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Nov 16, 2018
Version 0.6.6 Changes in this release: * Fix possible over-allocation in `from_slice` (#122) * Optional nightly-only `specialization` feature for `from_slice` optimization (#123) * New `from_raw_parts` constructor (#130) * Documentation and testing improvements (#125, #129) <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/rust-smallvec/131) <!-- Reviewable:end -->
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I added a new
specializationfeature that will specializeFrom<&[_: Copy]>to usefrom_slice, which offers a nice performance boost.Alas, I could not get any measurable perf improvement on
insert_manyorextendyet, so I'll leave them out for now.This change is