pp-deepcopy-hot — measured, still hint
Status
hint. Wall-clock JSONL: pp-deepcopy-hot.jsonl. Not corpus-triaged. The 2026-10-22 corpus verdict does not cover this slug.
Measurement
5000 copies of one small nested dict. After reuses the same object and does not copy.
| role | case | median_ms | ops | ratio |
|---|---|---|---|---|
| after | reuse_tree | 0.154042 | 5000 | 1 |
| before | deepcopy_each_iter | 29.745167 | 5000 | 193.098 |
CPython 3.15.1, 2026-10-23. Warm 3, median of 9. After reads the same nested field and does not copy.
The microbench shows a cost for this one shape. Default stays hint until the shape is corpus-triaged. This ratio is not a general speedup.
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.