Introduce `compact_str` and string interner for `Attr` keys by c-bata · Pull Request #36 · optuna/rustuna

c-bata · 2026-01-20T01:54:00Z

String interning and using CompactStr improves my local benchmark, which has over 50k trials and 10 user attributes for each.

Before:

$ python my_local_bench.py
Elapsed: 1.0223
Mem(Peak): 298.3 MiB

After:

$ python my_local_bench.py
Elapsed: 0.8506
Mem(Peak): 249.9 MiB

c-bata added 2 commits January 20, 2026 10:49

Use CompactStr for Attr keys

ed8c7f0

String interning by lasso

d871050

c-bata marked this pull request as ready for review January 20, 2026 02:37

c-bata merged commit cab17eb into main Jan 20, 2026
6 checks passed

c-bata deleted the string-interner branch January 20, 2026 02:37

c-bata mentioned this pull request Apr 22, 2026

Remove compact_str and once_cell from the dependency #108

Merged

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