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Feature plan: Step 1 · Step 2 · Step 3 · Step 4

Debug mode: enabled Effort study: railspike-effort / v3/activity_load_performance; ledger Extended estimates: enabled Cycle estimate: 0.95 Status: Step 1 Option C approved; Step 2 authorized for drafting; no implementation or deployment approval.

Original Query

When I'm browsing prod zenmemes.com, the activity page can be very slow to load. Please identify possible root causes and write a step 1 for remediation.

Problem and evidence

Activity can spend seconds waiting for HTML: anonymous production samples returned first bytes at 8.52 and 3.99 seconds, with another request timing out at 25 seconds; the homepage sample was 0.66 seconds.

Both standard and Forte Activity are in scope. Possible contributors include eager evidence work, Forte’s repeated sidebar-count scans and initial selected-item manifest, static-cache bypass, shared startup/lock waits and pagination costs. None is yet isolated as the production root cause. The 255 KB response does not reproduce the previously fixed 88 MB manifest explosion. Investigation and limitations.

Option A — Correct static delivery first

Estimate: 0.45

Measure route/cache selection, then repair existing artifact delivery and refresh behavior for affected public Activity routes, preserving access rules and recovery.

  • Pros: Small operational surface if artifacts or route selection dominate; existing infrastructure.

  • Cons: Forte has no equivalent static route in current source; delivery alone cannot cover both views. Deployed configuration is uncertain. Cookie bypass cannot simply be removed for restricted views.

Option B — Optimize work during requests

Estimate: 0.85

Measure both views, then make normal browsing cheap using the existing activity table: remove repeated count scans, bound initial detail work, reuse valid evidence results or resolve them on selection, and fix measured query costs.

  • Pros: Helps normal browsing, filtered/paged requests and cache misses; addresses code-supported amplification.

  • Cons: Evidence freshness, cursor stability, missing history and detail recovery need careful verification. Shared startup/infrastructure redesign is a separate scope if required.

Estimate: 0.95

Compute reusable Activity evidence and category totals during indexing, extending the existing read model only where needed. Both views read stored results through bounded queries; opening or selecting an activity item does not repeat Git traversal, signature verification or category-wide scans.

  • Pros: Fits largely append-only history; makes lists and selected details cheap without depending on page caches or moving the delay to selection.

  • Cons: New events, retractions/deletions, identity/visibility changes and changed source/signature/key availability must update affected data. Imports, rebuilds and interrupted updates need recovery; index-time cost must stay controlled.

Recommendation and approval

Choose C, narrowed to database-backed Activity rather than a new page-artifact system. Keep historical event facts distinct from current display/access state. Maintain affected entries and counts through existing indexing/update paths; retire affected cached pages after relevant changes under existing freshness/retraction rules. Do not retain deleted prose in projections or add a new publication-guard system.

The slice covers both initial pages, filters, standard Next/Back and Forte sort/append/selection, including unavailable evidence and rebuild/interruption recovery. Normal browsing must not silently fall back to expensive reconstruction. Full source/commit inspection remains separate. Verify production timing and shared startup independently; precomputation alone does not prove that intermittent host/lock delay is fixed. Step 2 sets measurable latency and freshness targets. Core read-model changes require version/spec updates, prior-version startup recovery tests and rebuild/normal-flow checks. No new dependencies.

Request disposition: Forte slowness added in v2. “Yes, please update step 1” accepts the precompute-on-indexing direction for this revision (v3/C); it does not approve Step 2 or implementation. Await Approved Step 1 under Railspike Step 1.

Study checkpoint: 2026-10-27T22:40:15Z; scope v1/B; baseline 7ef735dd21b3329f18716bf3d5484baab2b2b71b; R1/P2. Codex single exposed rater; pristine intake missing because inspection preceded scoring. First handoff projection 0.70; A/B/C are independent whole-cycle projections, not additive, hours or measured labor. Three frozen R1 hashes verified; standing enrollment applies. No implementation or accepted outcome; maintainer acceptance pending.

Study revision: 2026-10-27T22:57:57Z; scope v2/B includes Forte; projection 0.85 (A/B/C v2: 0.45/0.85/1.25). Earlier v1 estimates 0.40/0.70/1.15 retained above/by this record; increase reflects both added verification scope and count/selected-detail findings. Same baseline/R1/P2 and exposed rater; no implementation.

Study revision: 2026-10-27T23:04:17Z; scope v3/C; 0.95 projected total. C narrowed from v2’s broad projections/artifacts (1.25) to existing-read-model list/detail/count reads with targeted maintenance; A 0.45 and B 0.85 reaffirmed. Existing updater coverage and recovery drive uncertainty; split before implementation if it exceeds a comfortable cycle. Prior scores retained; same baseline/R1/P2/exposed rater, frozen hashes reverified. No implementation or acceptance.

— Codex · 2026-10-27 UTC

Approval record: 2026-10-27T23:07:52Z — user: “I'm OK with this. Approved Step 1.” Approves scope v3/C and the estimated storage tradeoff of 0.25–1 KB per event (excluding temporary rebuild/WAL space); this is a planning estimate, not a guaranteed cap. Earlier pending-approval statements above are historical. Proceed to Step 2 only.

— Codex · 2026-10-27 UTC