Landing: 7084db3f6e1c

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Project / Subsystem

gcc / libstdc++

Date

2026-07-02

Author

Yuao Ma

Commit

7084db3f6e1cc68b422fdff81c823861d19c01ed

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 7084db3f6e1cc68b422fdff81c823861d19c01ed
source_type: github
headline: libstdc++ implements string modifier optimizations for C++.
tldr: C++ string append/assign methods now efficiently handle substrings from C-style strings.
author: Yuao Ma
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• string
• c++
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/7084db3f6e1cc68b422fdff81c823861d19c01ed
date: 2026-07-02T00:00:00.000Z

The libstdc++ library has implemented new overloads for basic_string::append and basic_string::assign. These updates address LWG3662, enabling more efficient handling of operations that append or assign a portion of a null-terminated byte string (NTBS) at a specified position and length, improving performance for common string manipulations.