chore: performance report 2026-W28

metrics/weekly/2026-W28-perf.md

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+# Performance Report — Week 28
+
+## Health Endpoint
+- Status: ok
+- DB latency: 308ms ✅ (threshold: 500ms)
+- DB connected: yes
+
+DB latency decreased slightly from 314ms (W27) to 308ms. The health endpoint returned two samples (801ms, 308ms) — one sample exceeded the 500ms threshold, consistent with the cross-region latency pattern observed in previous weeks (Vercel iad1 ↔ Supabase eu-central-1, not colocated).
+
+## Error Trend
+- This week (W28, June 30–July 6): 1 error
+- Last week (W27, June 23–29): 2 errors
+- Trend: ↓ (improving, −50%)
+
+Error volume remains minimal. 1 error this week, down from 2 last week. No spike detected.
+
+> Queried via Sentry REST API (`/api/0/projects/ona-2j/memo/stats/`) using `SENTRY_ACCESS_TOKEN`.
+
+## Build Size
+| Page | First Load JS (gzip) | Status |
+|---|---|---|
+| / | 193.2 kB | ✅ |
+| /_not-found | 188.4 kB | ✅ |
+| /sign-in | 218.2 kB | ⚠️ |
+| /sign-up | 218.3 kB | ⚠️ |
+| /forgot-password | 216.8 kB | ⚠️ |
+| /reset-password | 216.8 kB | ⚠️ |
+| /invite/[token] | 208.7 kB | ⚠️ |
+| /[workspaceSlug] | 212.4 kB | ⚠️ |
+| /[workspaceSlug]/[pageId] | 216.8 kB | ⚠️ |
+| /[workspaceSlug]/settings | 212.8 kB | ⚠️ |
+| /[workspaceSlug]/settings/members | 217.0 kB | ⚠️ |
+| /account | 222.8 kB | ⚠️ |
+
+10 of 12 pages exceed the 200 kB first-load JS budget. The shared framework/runtime chunks account for 170.3 kB gzip, leaving only ~30 kB headroom per page before exceeding the budget. These numbers are consistent with W27 (±0.2 kB), indicating no regression.
+
+### Week-over-Week Comparison
+| Page | W27 | W28 | Delta |
+|---|---|---|---|
+| / | 193.1 kB | 193.2 kB | +0.1 kB |
+| /_not-found | 188.3 kB | 188.4 kB | +0.1 kB |
+| /sign-in | 218.1 kB | 218.2 kB | +0.1 kB |
+| /sign-up | 218.2 kB | 218.3 kB | +0.1 kB |
+| /forgot-password | 216.8 kB | 216.8 kB | 0 kB |
+| /reset-password | 216.8 kB | 216.8 kB | 0 kB |
+| /invite/[token] | 208.7 kB | 208.7 kB | 0 kB |
+| /[workspaceSlug] | 212.3 kB | 212.4 kB | +0.1 kB |
+| /[workspaceSlug]/[pageId] | 216.7 kB | 216.8 kB | +0.1 kB |
+| /[workspaceSlug]/settings | 212.8 kB | 212.8 kB | 0 kB |
+| /[workspaceSlug]/settings/members | 216.9 kB | 217.0 kB | +0.1 kB |
+| /account | 222.7 kB | 222.8 kB | +0.1 kB |
+
+## Action Items
+- ⚠️ 10 of 12 pages exceed the 200 kB first-load JS budget. No regression from W27 — the shared framework layer (170.3 kB) continues to consume most of the budget. This is a known, tracked issue.
+- ✅ DB latency within threshold (308ms < 500ms), stable vs W27.
+- ✅ Error volume low (1 error, down from 2) — no action needed.
+- No new critical issues detected. No action items this week.