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perf(pod_evicted): ratchet allocs/event 15.27 -> 1.90 (hit NORTHSTAR, #434) #456

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Merged
trilamsr merged 2 commits into from
Jun 2, 2026
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perf(pod_evicted): ratchet allocs/event 15.27 -> 1.90 (hit NORTHSTAR, #434) #456

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c06f313
perf(pod_evicted): ratchet allocs/event 15.27->1.90, NORTHSTAR (#434)
trilamsr Jun 2, 2026
04e7a76
refactor(434): apply reviewer trim sweep
trilamsr Jun 2, 2026
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8 changes: 4 additions & 4 deletions bench/detectors/baselines.json
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Original file line number Diff line number Diff line change
Expand Up @@ -8,10 +8,10 @@
"$threshold_pct": 10,
"detectors": {
"BenchmarkPodEvictedDetector": {
"allocs_per_op": 15635,
"b_per_op": 970020,
"allocs_per_event_approx": 15.27,
"notes": "Highest alloc/event detector; 1024 events fans out into 819 evictions + 64 node-pressure joins; per-evicted-pod verdict + evidence trail dominates."
"allocs_per_op": 1943,
"b_per_op": 473400,
"allocs_per_event_approx": 1.9,
"notes": "Hits NORTHSTAR (#434). Per-verdict headline + pod_event description are the irreducible floor (1 alloc each, 2 per verdict). Achieved via: (1) strconv byte-builders replacing fmt.Sprintf; (2) per-Evaluate scratch buffer shared across builders to eliminate `make([]byte)` escape; (3) pre-rendered indexed node-condition cache (uid + description + remediation) re-used across all full-path joins; (4) partial-path remediation cache keyed by (node, pressure); (5) shared evidence-trail backing array sliced cap=2 per verdict; (6) slices.SortStableFunc replacing reflection-based sort.SliceStable; (7) zero-alloc containsFold scan replacing strings.ToLower."
},
"BenchmarkXidCorrelationDetector": {
"allocs_per_op": 1928,
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