cx-sstream-in-loop — measured, still hint
Status
hint. Wall-clock JSONL: cx-sstream-in-loop.jsonl. Not corpus-triaged. The 2026-10-22 corpus verdict does not cover this slug.
Measurement
20000 iterations. Before constructs an ostringstream each iteration; after clears and reuses one stream. Modest difference.
| role | case | median_ms | ops | ratio |
|---|---|---|---|---|
| after | reuse_stream | 1.006000 | 20000 | 1 |
| before | stream_each_iter | 1.806000 | 20000 | 1.795 |
The microbench shows a small difference only. Default stays hint.
Unblock
Do not set the default to error from this file alone. A changing input, a cold path, or another ABI can erase the difference. Corpus triage is still required before any default change.