Search results

[libc++] Algorithms like <code>copy</code> and <code>copy_n</code> can use batch insertion for insert iterators into containers

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open.

#163134 In llvm/llvm-project;

· kelbon opened on Oct 13, 2025

[libcxx] Optimize std::generate for segmented iterators

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 163006

#163006 In llvm/llvm-project;

· c8ef opened on Oct 11, 2025

[libc++] Optimize <code>std::exception_ptr</code>

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 162773

#162773 In llvm/llvm-project;

· vogelsgesang opened on Oct 10, 2025

[libc++] Investigate why SetIntersection_Interlaced_Vector_tuple&lt;uint32,_uint64,_uint32&gt;_262144_262144 is orders of magnitude faster in the unstable ABI

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open.

#162357 In llvm/llvm-project;

· ldionne opened on Oct 7, 2025

[libc++] Investigate why fill and fill_n on vector&lt;bool&gt; are 73% faster in the unstable ABI

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open.

#162356 In llvm/llvm-project;

· ldionne opened on Oct 7, 2025

[libc++] Investigate why <code>std::vector&lt;std::string&gt;::operator=</code> is 50% slower with the stable ABI

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open.

#162355 In llvm/llvm-project;

· ldionne opened on Oct 7, 2025

[libc++] Investigate performance discrepancies with the unstable ABI

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

metaissueIssue to collect references to a group of similar or related issues.Issue to collect references to a group of similar or related issues.

performance

Status: Open.

#162354 In llvm/llvm-project;

· ldionne opened on Oct 7, 2025

[libc++] Inline vector::__append into resize

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 162086

#162086 In llvm/llvm-project;

· philnik777 opened on Oct 6, 2025

[libc++] Simplify and clean up heap operations

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 159917

#159917 In llvm/llvm-project;

· nukyan opened on Sep 20, 2025

[libc++] Use relocation in vector::emplace_back

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 159365

#159365 In llvm/llvm-project;

· philnik777 opened on Sep 17, 2025

Inconsistent assembly emitted when dividing integers by a constant in unoptimized builds (-O0)

backend:AArch64

backend:RISC-V

backend:X86

llvm:codegen

performance

Status: Open.

#159249 In llvm/llvm-project;

· Bagellll opened on Sep 17, 2025

[libc++] Refactor __next_prime to be const

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

performance

Status: Open (in progress).

llvm/llvm-projectnumber 157421

#157421 In llvm/llvm-project;

· philnik777 opened on Sep 8, 2025