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llvm-project/libcxx/test/benchmarks
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Timothy Choi d282452e4c
[libc++] Avoid string reallocation in std::filesystem::path::lexically_relative (#152964) 
Improves runtime by around 20 to 40%. (1.3x to 1.7x)

```
Benchmark                                                           Time             CPU      Time Old      Time New       CPU Old       CPU New
------------------------------------------------------------------------------------------------------------------------------------------------
BM_LexicallyRelative/small_path/2                                -0.2111         -0.2082           229           181           228           180
BM_LexicallyRelative/small_path/4                                -0.2579         -0.2550           455           338           452           337
BM_LexicallyRelative/small_path/8                                -0.2643         -0.2616           844           621           838           619
BM_LexicallyRelative/small_path/16                               -0.2582         -0.2556          1562          1158          1551          1155
BM_LexicallyRelative/small_path/32                               -0.2518         -0.2496          3023          2262          3004          2254
BM_LexicallyRelative/small_path/64                               -0.2806         -0.2775          6344          4564          6295          4549
BM_LexicallyRelative/small_path/128                              -0.2165         -0.2137         11762          9216         11683          9186
BM_LexicallyRelative/small_path/256                              -0.2672         -0.2645         24499         17953         24324         17891
BM_LexicallyRelative/large_path/2                                -0.3268         -0.3236           426           287           422           285
BM_LexicallyRelative/large_path/4                                -0.3274         -0.3248           734           494           729           492
BM_LexicallyRelative/large_path/8                                -0.3586         -0.3560          1409           904          1399           901
BM_LexicallyRelative/large_path/16                               -0.3978         -0.3951          2764          1665          2743          1659
BM_LexicallyRelative/large_path/32                               -0.3934         -0.3908          5323          3229          5283          3218
BM_LexicallyRelative/large_path/64                               -0.3629         -0.3605         10340          6587         10265          6564
BM_LexicallyRelative/large_path/128                              -0.3450         -0.3423         19379         12694         19233         12649
BM_LexicallyRelative/large_path/256                              -0.3097         -0.3054         36293         25052         35943         24965
```

---------

Co-authored-by: Nikolas Klauser <nikolasklauser@berlin.de>
2025-08-20 16:58:21 +02:00
..
algorithms
[libc++] Optimize ranges::{for_each, for_each_n} for segmented iterators (#132896)
2025-06-18 12:22:47 -04:00
containers
[libc++] Optimize copy construction and assignment of __tree (#151304)
2025-08-05 09:49:40 +02:00
format
[libc++] Add basic constant folding for std::format (#107197)
2025-05-15 10:37:32 +02:00
libcxxabi
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
locale
[libc++] Optimize ctype::to{lower,upper} (#145344)
2025-07-09 16:32:01 +02:00
numeric
[libc++] Fix the batch size used in the std::gcd benchmark (#120618)
2025-01-06 15:34:33 -05:00
streams
[libc++] Optimize std::getline (#121346)
2025-05-19 10:59:36 +02:00
atomic_wait_1_waiter_1_notifier.bench.cpp
[libc++] remove yield from atomic::wait (#120012)
2025-01-18 14:50:53 +00:00
atomic_wait_helper.h
[libc++] remove yield from atomic::wait (#120012)
2025-01-18 14:50:53 +00:00
atomic_wait_multi_waiter_1_notifier.bench.cpp
[libc++] remove yield from atomic::wait (#120012)
2025-01-18 14:50:53 +00:00
atomic_wait_N_waiter_N_notifier.bench.cpp
[libc++] remove yield from atomic::wait (#120012)
2025-01-18 14:50:53 +00:00
atomic_wait_vs_mutex_lock.bench.cpp
[libc++] Include headers in <thread> conditionally (#116539)
2024-11-20 23:07:20 +01:00
bitset.bench.cpp
[libc++] Simplify __bitset::__init (#121357)
2025-05-28 12:09:50 -04:00
CartesianBenchmarks.h
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
CMakeLists.txt
[libcxx] Passthrough the necessary CMake variables to benchmarks (#116644)
2024-11-19 14:23:29 -08:00
exception_ptr.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
filesystem.bench.cpp
[libc++] Avoid string reallocation in std::filesystem::path::lexically_relative (#152964)
2025-08-20 16:58:21 +02:00
function.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
GenerateInput.h
[libc++] Refactor and add benchmarks from [alg.nonmodifying] (#128206)
2025-03-19 00:08:46 -04:00
hash.bench.cpp
[libc++] Refactor the sequence container benchmarks (#119763)
2025-01-30 15:02:34 -05:00
join_view.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
monotonic_buffer.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
random.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
shared_mutex_vs_mutex.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
stop_token.bench.cpp
[libc++] Include headers in <thread> conditionally (#116539)
2024-11-20 23:07:20 +01:00
stringstream.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
system_error.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
to_chars.bench.cpp
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00
utc_clock.bench.cpp
[libc++][chrono] implements UTC clock. (#90393)
2025-01-24 18:56:02 +01:00
util_smartptr.bench.cpp
[libc++] Unify the benchmarks with the test suite (#101399)
2024-11-07 09:07:50 -05:00
variant_visit_1.bench.cpp
[libc++] Refactor the sequence container benchmarks (#119763)
2025-01-30 15:02:34 -05:00
variant_visit_2.bench.cpp
[libc++] Refactor the sequence container benchmarks (#119763)
2025-01-30 15:02:34 -05:00
variant_visit_3.bench.cpp
[libc++] Refactor the sequence container benchmarks (#119763)
2025-01-30 15:02:34 -05:00
VariantBenchmarks.h
[libc++] Make benchmarks forward-compatible with the test suite (#114502)
2024-11-05 09:08:00 -05:00