Adam Richardson 370d4ce200 rope: Micro optimize the creation of masks (#41132) ... Using compiler explorer I saw that the compiler wasn't clever enough to optimise away the branches in the masking code. I thought the compiler would have a better chance if we always branched, which [turned out to be the case](https://godbolt.org/z/PM594Pz18). Running the benchmarks the biggest benefit I saw was: ``` push/65536 time: [2.9067 ms 2.9243 ms 2.9417 ms] thrpt: [21.246 MiB/s 21.373 MiB/s 21.502 MiB/s] change: time: [-8.3452% -7.2617% -6.2009%] (p = 0.00 < 0.05) thrpt: [+6.6108% +7.8303% +9.1050%] Performance has improved. ``` But I did also see some regressions: ``` slice/4096 time: [66.195 µs 66.815 µs 67.448 µs] thrpt: [57.915 MiB/s 58.464 MiB/s 59.012 MiB/s] change: time: [+3.7131% +5.1698% +6.6971%] (p = 0.00 < 0.05) thrpt: [-6.2768% -4.9157% -3.5802%] Performance has regressed. ``` Release Notes: - N/A		2025-10-27 16:16:16 +01:00
..
benches	Rope benchmarks: Generate random strings measured in bytes, not chars (#39951)	2025-10-22 00:42:05 +02:00
src	rope: Micro optimize the creation of masks (#41132)	2025-10-27 16:16:16 +01:00
Cargo.toml	editor: Fix panics in CursorPosition::update_position (#41237)	2025-10-27 08:26:39 +00:00
LICENSE-GPL	chore: Change AGPL-licensed crates to GPL (except for collab) (#4231)	2024-01-24 00:26:58 +01:00