bors e9013ac0e4 Auto merge of #118273 - AngelicosPhosphoros:dedup_2_loops_version_77772_2, r=the8472 ... Split `Vec::dedup_by` into 2 cycles First cycle runs until we found 2 same elements, second runs after if there any found in the first one. This allows to avoid any memory writes until we found an item which we want to remove. This leads to significant performance gains if all `Vec` items are kept: -40% on my benchmark with unique integers. Results of benchmarks before implementation (including new benchmark where nothing needs to be removed): * vec::bench_dedup_all_100 74.00ns/iter +/- 13.00ns * vec::bench_dedup_all_1000 572.00ns/iter +/- 272.00ns * vec::bench_dedup_all_100000 64.42µs/iter +/- 19.47µs * __vec::bench_dedup_none_100 67.00ns/iter +/- 17.00ns__ * __vec::bench_dedup_none_1000 662.00ns/iter +/- 86.00ns__ * __vec::bench_dedup_none_10000 9.16µs/iter +/- 2.71µs__ * __vec::bench_dedup_none_100000 91.25µs/iter +/- 1.82µs__ * vec::bench_dedup_random_100 105.00ns/iter +/- 11.00ns * vec::bench_dedup_random_1000 781.00ns/iter +/- 10.00ns * vec::bench_dedup_random_10000 9.00µs/iter +/- 5.62µs * vec::bench_dedup_random_100000 449.81µs/iter +/- 74.99µs * vec::bench_dedup_slice_truncate_100 105.00ns/iter +/- 16.00ns * vec::bench_dedup_slice_truncate_1000 2.65µs/iter +/- 481.00ns * vec::bench_dedup_slice_truncate_10000 18.33µs/iter +/- 5.23µs * vec::bench_dedup_slice_truncate_100000 501.12µs/iter +/- 46.97µs Results after implementation: * vec::bench_dedup_all_100 75.00ns/iter +/- 9.00ns * vec::bench_dedup_all_1000 494.00ns/iter +/- 117.00ns * vec::bench_dedup_all_100000 58.13µs/iter +/- 8.78µs * __vec::bench_dedup_none_100 52.00ns/iter +/- 22.00ns__ * __vec::bench_dedup_none_1000 417.00ns/iter +/- 116.00ns__ * __vec::bench_dedup_none_10000 4.11µs/iter +/- 546.00ns__ * __vec::bench_dedup_none_100000 40.47µs/iter +/- 5.36µs__ * vec::bench_dedup_random_100 77.00ns/iter +/- 15.00ns * vec::bench_dedup_random_1000 681.00ns/iter +/- 86.00ns * vec::bench_dedup_random_10000 11.66µs/iter +/- 2.22µs * vec::bench_dedup_random_100000 469.35µs/iter +/- 20.53µs * vec::bench_dedup_slice_truncate_100 100.00ns/iter +/- 5.00ns * vec::bench_dedup_slice_truncate_1000 2.55µs/iter +/- 224.00ns * vec::bench_dedup_slice_truncate_10000 18.95µs/iter +/- 2.59µs * vec::bench_dedup_slice_truncate_100000 492.85µs/iter +/- 72.84µs Resolves #77772 P.S. Note that this is same PR as #92104 I just missed review then forgot about it. Also, I cannot reopen that pull request so I am creating a new one. I responded to remaining questions directly by adding commentaries to my code.		2023-12-05 21:40:02 +00:00
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alloc	Auto merge of #118273 - AngelicosPhosphoros:dedup_2_loops_version_77772_2, r=the8472	2023-12-05 21:40:02 +00:00
backtrace@6145fe6bac	Update backtrace submodule	2023-11-21 16:33:42 +01:00
core	Auto merge of #118362 - RalfJung:panic_nounwind, r=thomcc	2023-12-05 12:05:22 +00:00
panic_abort	Rebase to master	2023-09-22 17:23:33 +05:30
panic_unwind	Use pointers instead of usize addresses for landing pads	2023-10-10 09:59:39 +02:00
portable-simd	portable-simd: add missing feature gate	2023-12-04 08:16:03 +01:00
proc_macro	Bump cfg(bootstrap)s	2023-11-15 19:41:28 -05:00
profiler_builtins	Bump cfg(bootstrap)	2023-08-23 20:05:14 -04:00
rtstartup	Remove custom frame info registration on i686-pc-windows-gnu	2022-08-23 16:12:58 +08:00
rustc-std-workspace-alloc	Replace libstd, libcore, liballoc in line comments.	2022-12-30 14:00:42 +01:00
rustc-std-workspace-core	Switch all libraries to the 2021 edition	2021-12-23 19:03:47 +08:00
rustc-std-workspace-std	Switch all libraries to the 2021 edition	2021-12-23 19:03:47 +08:00
std	Auto merge of #118487 - RalfJung:exposed-provenance, r=thomcc	2023-12-03 07:04:12 +00:00
stdarch@f4528dd6e8	Bump stdarch submodule	2023-10-12 11:11:29 +02:00
sysroot	Expose compiler-builtins-weak-intrinsics feature for -Zbuild-std	2023-06-23 11:15:34 +01:00
test	Bump cfg(bootstrap)s	2023-11-15 19:41:28 -05:00
unwind	Remove obsolete support for linking unwinder on Android	2023-11-02 18:06:35 -07:00