Performance gates

SLA targets and CI budgets for perf regressions.

1) Targets (SLA)

• p95 scroll latency $\le 16,ms$
• selection drag $\ge 55,FPS$
• overlay open/close $\le 2,ms$
• heap delta $\le 80,MB$

2) Harness

• pnpm run bench:datagrid:harness
• pnpm run bench:regression

Artifacts:

• artifacts/performance/datagrid-benchmark-report.json
• artifacts/quality/datagrid-benchmark-gates-report.json

3) Fail‑fast

pnpm run quality:perf:datagrid validates budgets and reports.