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perf: split append attribution

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Kinneyzhang 2026-08-20 07:58:44 +08:00
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12
.phrase/phases/phase-kp-overhaul-20260726/change_post_audit_hardening_20260820.md
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@ -66,6 +66,18 @@
yet because the measured DP/append owners require an exact redesign.
- **Commit:** `db6e6b9`.
## 2026-08-20 — Split append preparation, assembly, and DP timings
- **Modify** the evaluator to time `ekp--append-para` and
`ekp--layout-plan-from-para` independently, fixing a wrapper-name collision
found by the first red run.
- **Evidence:** latest source-fresh candidate p95 is C append/append-DP
16.953/1.015 ms and Elisp append/append-DP 71.896/55.970 ms; both engines
spend about 9.753 ms in append preparation and 5.663 ms in plan assembly.
The report remains red, raw JSONL is nonempty, and the wrapper itself now
passes the same matrix without argument errors.
- **Commit:** Pending measurement commit.
## Verification
- Source-first normal ERT: 295/295.

4
.phrase/phases/phase-kp-overhaul-20260726/task_post_audit_hardening_20260820.md
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@ -59,3 +59,7 @@
nonempty raw JSONL per run. Current source-fresh p95 is 17.161/1.187 ms
for C append/append-DP and 73.293/57.063 ms for Elisp; choose a
production optimization only after this attribution remains stable.
- It now also records append preparation/assembly separately: latest p95
is 9.753/5.663 ms for both engines, while Elisp append-DP is 55.970 ms
and C append-DP is 1.015 ms. The evaluator wrapper collision was fixed and
the same source matrix passes the harness without argument errors.

5
postmortem/20260820-source-fresh-live-commit-gate.md
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@ -35,6 +35,11 @@ one-line optimization. A broad DP or projection rewrite would need a new
red/green parity matrix and architecture decision; it is not smuggled into
this measurement change.
The finer attribution separates the latest source-fresh append p95 into
`append_para`/`append_plan`: C 9.753/5.663 ms and Elisp 9.753/5.663 ms. The
Elisp `append_dp` remains 55.970 ms; C `append_dp` remains 1.015 ms. This is
why a C-only change cannot close the locked gate.
## Consequences
- `issue028` is closed as an evaluator-integrity defect.

22
tests/ekp-live-commit-evaluator.el
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@ -51,6 +51,8 @@
(defvar ekp-live-commit-evaluator--dp-ms 0.0)
(defvar ekp-live-commit-evaluator--append-ms 0.0)
(defvar ekp-live-commit-evaluator--append-dp-ms 0.0)
(defvar ekp-live-commit-evaluator--append-para-ms 0.0)
(defvar ekp-live-commit-evaluator--append-plan-ms 0.0)
(defvar ekp-live-commit-evaluator--module-ms 0.0)
(defvar ekp-live-commit-evaluator--install-ms 0.0)
(defvar ekp-live-commit-evaluator--clear-ms 0.0)
@ -99,6 +101,8 @@
ekp-live-commit-evaluator--dp-ms 0.0
ekp-live-commit-evaluator--append-ms 0.0
ekp-live-commit-evaluator--append-dp-ms 0.0
ekp-live-commit-evaluator--append-para-ms 0.0
ekp-live-commit-evaluator--append-plan-ms 0.0
ekp-live-commit-evaluator--module-ms 0.0
ekp-live-commit-evaluator--install-ms 0.0
ekp-live-commit-evaluator--clear-ms 0.0
@ -171,6 +175,8 @@
(para (symbol-function 'ekp--get-para))
(dp (symbol-function 'ekp--dp-cache-para))
(append-dp (symbol-function 'ekp--dp-cache-append))
(append-para (symbol-function 'ekp--append-para))
(append-layout (symbol-function 'ekp--layout-plan-from-para))
(module (symbol-function 'ekp-c-break-with-arrays))
(install (symbol-function 'ekp-buffer--install-live-prefix))
(suffix (symbol-function 'ekp-buffer--clear-live-suffix))
@ -199,6 +205,12 @@
((symbol-function 'ekp--dp-cache-append)
(ekp-live-commit-evaluator--timed-wrapper
'ekp-live-commit-evaluator--append-dp-ms nil append-dp))
((symbol-function 'ekp--append-para)
(ekp-live-commit-evaluator--timed-wrapper
'ekp-live-commit-evaluator--append-para-ms nil append-para))
((symbol-function 'ekp--layout-plan-from-para)
(ekp-live-commit-evaluator--timed-wrapper
'ekp-live-commit-evaluator--append-plan-ms nil append-layout))
((symbol-function 'ekp-c-break-with-arrays)
(ekp-live-commit-evaluator--timed-wrapper
'ekp-live-commit-evaluator--module-ms
@ -257,6 +269,8 @@
(dp_ms . ,ekp-live-commit-evaluator--dp-ms)
(append_ms . ,ekp-live-commit-evaluator--append-ms)
(append_dp_ms . ,ekp-live-commit-evaluator--append-dp-ms)
(append_para_ms . ,ekp-live-commit-evaluator--append-para-ms)
(append_plan_ms . ,ekp-live-commit-evaluator--append-plan-ms)
(module_ms . ,ekp-live-commit-evaluator--module-ms)
(publication_ms
. ,(+ ekp-live-commit-evaluator--install-ms
@ -489,6 +503,10 @@
baseline 'append_ms))
(append_dp . ,(ekp-live-commit-evaluator--statistics
baseline 'append_dp_ms))
(append_para . ,(ekp-live-commit-evaluator--statistics
baseline 'append_para_ms))
(append_plan . ,(ekp-live-commit-evaluator--statistics
baseline 'append_plan_ms))
(module . ,(ekp-live-commit-evaluator--statistics
baseline 'module_ms))
(publication
@ -509,6 +527,10 @@
candidate 'append_ms))
(append_dp . ,(ekp-live-commit-evaluator--statistics
candidate 'append_dp_ms))
(append_para . ,(ekp-live-commit-evaluator--statistics
candidate 'append_para_ms))
(append_plan . ,(ekp-live-commit-evaluator--statistics
candidate 'append_plan_ms))
(module . ,(ekp-live-commit-evaluator--statistics
candidate 'module_ms))
(publication