llvm-project/llvm/lib/Option
Nadav Rotem d54c252bc8 [Clang options] Optimize optionMatches() runtime by removing mallocs
The method optionMatches() constructs 9865 std::string instances when comparing different
options. Many of these instances exceed the size of the internal storage and force memory
allocations. This patch adds an early exit check that eliminates most of the string allocations
while keeping the code simple.

Example inputs:
Prefix: /, Name: Fr
Prefix: -, Name: Fr
Prefix: -, Name: fsanitize-address-field-padding=
Prefix: -, Name: fsanitize-address-globals-dead-stripping
Prefix: -, Name: fsanitize-address-poison-custom-array-cookie
Prefix: -, Name: fsanitize-address-use-after-scope
Prefix: -, Name: fsanitize-address-use-odr-indicator
Prefix: -, Name: fsanitize-blacklist=

Differential Revision: D85538
2020-08-12 23:07:07 -07:00
..
Arg.cpp Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
ArgList.cpp Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
CMakeLists.txt [cmake] Explicitly mark libraries defined in lib/ as "Component Libraries" 2019-11-21 10:48:08 -08:00
LLVMBuild.txt
OptTable.cpp [Clang options] Optimize optionMatches() runtime by removing mallocs 2020-08-12 23:07:07 -07:00
Option.cpp [OptTable] Support grouped short options 2020-07-17 09:32:43 -07:00