Martijn Vels b019c5c037 Partially inline basic_string copy constructor in UNSTABLE ... Summary: This is a recommit of https://reviews.llvm.org/D73223 where the added function accidentally ended up inside an idef block. This change splits the copy constructor up inlining short initialization, and explicitly outlining long initialization into __init_copy_ctor_external() which is the externally instantiated slow path. For unstable ABI, this has the following changes: remove basic_string(const basic_string&) remove basic_string(const basic_string&, const Allocator&) add __init_copy_ctor_external(const value_type*, size_type) Quick local benchmark for Copy: Master ``` --------------------------------------------------------------- Benchmark Time CPU Iterations --------------------------------------------------------------- BM_StringCopy_Empty 3.50 ns 3.51 ns 199326720 BM_StringCopy_Small 3.50 ns 3.51 ns 199510016 BM_StringCopy_Large 15.7 ns 15.7 ns 45230080 BM_StringCopy_Huge 1503 ns 1503 ns 464896 ``` With this change ``` --------------------------------------------------------------- Benchmark Time CPU Iterations --------------------------------------------------------------- BM_StringCopy_Empty 1.99 ns 2.00 ns 356471808 BM_StringCopy_Small 3.29 ns 3.30 ns 203425792 BM_StringCopy_Large 13.3 ns 13.3 ns 52948992 BM_StringCopy_Huge 1472 ns 1472 ns 475136 ``` Subscribers: libcxx-commits Tags: #libc Differential Revision: https://reviews.llvm.org/D75639		2020-03-04 17:52:46 -05:00
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benchmarks	Add benchmarks for basic_string::erase	2020-02-19 17:09:25 -05:00
cmake	[libc++] Explicitly specify LIBCXX_ENABLE_SHARED to try and fix CI	2020-01-29 17:29:43 -08:00
docs	Reland [libc++] [P0325] Implement to_array from LFTS with updates.	2020-01-31 11:47:18 +01:00
fuzzing	[libc++] Tolerate NaN returning random distributions for now	2019-12-12 17:11:13 -05:00
include	Partially inline basic_string copy constructor in UNSTABLE	2020-03-04 17:52:46 -05:00
lib	[libc++] Fix CI and Linux failures after landing D68480	2020-02-24 11:58:25 -05:00
src	Add flag _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATIONS for basic_string ABI	2020-03-02 10:26:37 -05:00
test	Partially inline basic_string copy constructor in UNSTABLE	2020-03-04 17:52:46 -05:00
utils	[libcxx] Drop -D option from libtool when merging archives	2020-03-02 16:07:18 -08:00
www	[libc++] Implementation of C++20's P1135R6 for libcxx	2020-02-24 10:59:35 -05:00
.clang-format
.gitignore
appveyor-reqs-install.cmd
appveyor.yml
CMakeLists.txt	[CMake][libcxx] Don't wrap __config_site path in quotes on Windows	2020-01-29 19:37:35 -08:00
CREDITS.TXT	[libcxx] Add Sergej Jaskiewicz to CREDITS.txt	2019-11-21 12:06:10 +03:00
LICENSE.TXT
NOTES.TXT
TODO.TXT