bors 12b5d3c29c Auto merge of #124294 - tspiteri:ilog-first-iter, r=the8472 ... Unroll first iteration of checked_ilog loop This follows the optimization of #115913. As shown in https://github.com/rust-lang/rust/pull/115913#issuecomment-2066788006, the performance was improved in all important cases, but some regressions were introduced for the benchmarks `u32_log_random_small`, `u8_log_random` and `u8_log_random_small`. Basically, #115913 changed the implementation from one division per iteration to one multiplication per iteration plus one division. When there are zero iterations, this is a regression from zero divisions to one division. This PR avoids this by avoiding the division if we need zero iterations by returning `Some(0)` early. It also reduces the number of multiplications by one in all other cases.		2024-06-02 00:05:32 +00:00
..
benches	Write char::DebugEscape sequences using write_str	2024-05-20 10:04:44 +02:00
src	Auto merge of #124294 - tspiteri:ilog-first-iter, r=the8472	2024-06-02 00:05:32 +00:00
tests	[ACP 362] genericize ptr::from_raw_parts	2024-05-29 09:34:16 -07:00
Cargo.toml	Remove now outdated comment since we bumped stage0	2024-05-24 08:08:41 +02:00