Landing: 33ac889aa27d
Project / Subsystem
gcc / libstdc++
Date
2026-05-25
Author
Tomasz Kamiński
Commit
33ac889aa27d9917e6e7d07c282015b7c48e0440
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 33ac889aa27d9917e6e7d07c282015b7c48e0440
- source_type
- github
- headline
- libstdc++: Optimize stream output for piecewise distributions.
- tldr
- The `operator<<` for piecewise distributions avoids creating a temporary vector, improving performance.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • random
- • optimization
- • iostreams
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-05-25T00:00:00.000Z
The operator<< for piecewise_constant_distribution and piecewise_linear_distribution now directly accesses the internal _M_int and _M_den members of the _M_param structure, avoiding the creation of a temporary vector. This improves the performance of streaming these distributions, particularly when they contain a large number of intervals.