Nicholas Nethercote 679c5ee244 Optimize Vec::insert for the case where index == len. ... By skipping the call to `copy` with a zero length. This makes it closer to `push`. I did this recently for `SmallVec` (https://github.com/servo/rust-smallvec/pull/282) and it was a big perf win in one case. Although I don't have a specific use case in mind, it seems worth doing it for `Vec` as well. Things to note: - In the `index < len` case, the number of conditions checked is unchanged. - In the `index == len` case, the number of conditions checked increases by one, but the more expensive zero-length copy is avoided. - In the `index > len` case the code now reserves space for the extra element before panicking. This seems like an unimportant change.		2022-07-01 06:46:30 +10:00
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benches	Add VecDeque::extend TrustedLen benchmark	2022-06-17 23:41:03 +02:00
src	Optimize Vec::insert for the case where index == len.	2022-07-01 06:46:30 +10:00
tests	liballoc tests: avoid int2ptr cast	2022-06-27 10:50:56 -04:00
Cargo.toml	Switch all libraries to the 2021 edition	2021-12-23 19:03:47 +08:00