Evidence readout
standard `304 -> 305 ms/step`, capable `632 -> ~640 ms/step`
What the attempt taught
Hot-path hygiene is not the same as a performance win; measure the real step time before claiming speedup.
Why it stopped or stayed bounded
Caching backward scratch buffers removed hot-path allocations but produced no measurable speedup because compute, not malloc, was the bottleneck.
Method and scope
- Experiment family: runtime perf.
- Record kind: infrastructure.
Disposition
Keep the allocation cleanup, but do not prioritize allocator work until profiling shows allocation cost again.
This retained disposition is historical evidence, not authorization to restart the experiment. A new run needs a fresh question, frozen evaluator, explicit resource budget, and scoped tracking issue.
How to read this dossier
This canonical page separates the retained repository decision from the material that informed it. A source may describe an external claim, historical measurement, local observation, or planned procedure; those evidence classes are not interchangeable. Follow the provenance links before reusing a number or method.
Status and disposition describe what PostTrainLLM retained when this record was indexed. They are not a live product promise, a newly run benchmark, or permission to restart historical work. Unknown or unmeasured fields remain unknown rather than being treated as zero.
To reuse the record, first name the exact claim you need and trace it to the linked source. Then check whether the original environment, model revision, data split, evaluator, hardware, and budget match the proposed use. If they do not, treat the record as a hypothesis or design reference and run the smallest fresh comparison that can falsify it. Preserve negative outcomes and regressions beside any improvement; a local win on one slice does not silently become a general capability claim.
Source provenance
The normalized record comes from docs/attempts.json. The links below are the tracked evidence and explanatory sources preserved with the record.