Eric Fiselier ad1a12c312 Improve performance of constructing filesystem::path from strings. ...

This patch fixes a performance bug when constructing or appending to a path
from a string or c-string. Previously we called 'push_back' to append every
single character. This caused multiple re-allocation and copies when at most
one reallocation is necessary. The new behavior is to simply call
`string::append` so it can correctly handle reallocation.

For large strings this change is a ~4x improvement. This also makes our path
faster to construct than libstdc++'s.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@285530 91177308-0d34-0410-b5e6-96231b3b80d8

2016-10-30 23:53:50 +00:00

..

experimental

Improve performance of constructing filesystem::path from strings.

2016-10-30 23:53:50 +00:00

include

[libcxx] Add support for Fuchsia

2016-10-10 18:53:32 +00:00

support

[solaris] Convert the support library to C++ to fix -std=c++11 build

2016-10-18 16:54:59 +00:00

algorithm.cpp

Mark libc++ internal globals with _LIBCPP_SAFE_STATIC.

2016-09-28 22:08:13 +00:00

any.cpp

[libcxx] Add std::any

2016-08-11 03:13:11 +00:00

bind.cpp

Implement LWG 2488 - Make the placeholders constexpr.

2016-06-26 21:01:34 +00:00

chrono.cpp

Remove workarounds for C++17 inline variable ABI break. It has been fixed in clang.

2016-07-02 03:21:58 +00:00

condition_variable.cpp

Fix PR30202 - notify_all_at_thread_exit seg faults if run from a raw pthread context.

2016-09-03 08:07:40 +00:00

debug.cpp

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

exception.cpp

Mark libc++ internal globals with _LIBCPP_SAFE_STATIC.

2016-09-28 22:08:13 +00:00

future.cpp

Make it possible to build a no-exceptions variant of libcxx.

2015-11-10 11:41:22 +00:00

hash.cpp

Fix typos

2014-05-15 11:27:39 +00:00

ios.cpp

[libc++] Fix extern template visibility for Windows

2016-09-19 18:29:07 +00:00

iostream.cpp

Make the presence of stdin and stdout optional.

2015-03-26 14:35:46 +00:00

locale.cpp

[libc++] Fix extern template visibility for Windows

2016-09-19 18:29:07 +00:00

memory.cpp

Mark libc++ internal globals with _LIBCPP_SAFE_STATIC.

2016-09-28 22:08:13 +00:00

mutex.cpp

Mark libc++ internal globals with _LIBCPP_SAFE_STATIC.

2016-09-28 22:08:13 +00:00

new.cpp

Implement P0035R4 -- Add C++17 aligned allocation functions

2016-10-14 06:46:30 +00:00

optional.cpp

Implement N4606 optional

2016-10-12 07:46:20 +00:00

random.cpp

Add support for arc4random() to random_device.

2015-03-10 07:46:06 +00:00

regex.cpp

[libcxx] Remove pragmas that were needed to suppress warnings produced

2016-01-28 06:13:36 +00:00

shared_mutex.cpp

Implement N4508: shared_mutex. Reviewed as http://reviews.llvm.org/D10480

2015-06-30 14:04:14 +00:00

stdexcept.cpp

[libc++] Fix modules build - Rework __refstring definition

2016-10-25 19:33:14 +00:00

string.cpp

Revert r284193 - it is not correct on OS X

2016-10-14 04:21:24 +00:00

strstream.cpp

Fix or suppress GCC warnings during build.

2016-08-29 20:43:38 +00:00

system_error.cpp

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

thread.cpp

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

typeinfo.cpp

Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.

2016-08-25 15:09:01 +00:00

utility.cpp

Put std::piecewise_construct_t back into the dylib for ABI stability. When clients are in C++11/constexpr mode this will be safely ignored because piecewise_construct is then declared with internal linkage.

2012-04-03 23:45:46 +00:00

valarray.cpp

Revert "Turn off extern templates for most uses."

2014-08-15 17:58:56 +00:00