Evidence readout
prompt-cache hot run `1.005 s -> 0.106 s`; pre-alloc decode stayed `706 -> 711 tok/s` with physical cache flat at `6.3 MB`
What the attempt taught
Reuse of prefilled KV is the user-visible win; cache storage policy changes need composition gates before becoming defaults.
Why it stopped or stayed bounded
Persistent prompt cache delivered the TTFT win, but pre-alloc was kept opt-in, pre-alloc does not compose with KIVI or StreamingLLM, and some cache keying edge cases remain.
Method and scope
- Experiment family: runtime perf.
- Record kind: infrastructure.
Disposition
Keep prompt-cache as the main shipped path and revisit pre-alloc defaults only after KIVI/StreamingLLM interactions are designed.
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.