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Mythic Masters: open-world frame budget (95th under 16.7 ms, no hitch, a party of six), hill climb to 8/10, rounds 1+ #3664
Description
Score: 0/10 (target 8, on the owner's scale: agent judges halve their number, per the 2026-11-05 reset)
The owner's brief (2026-11-05): Mythic Masters' open world must be performant, especially once friends walk it together (#3663). The world is a heightfield continent with three ground patches rebuilt as you walk, instanced plants, a sky dome and weather, flocks and wild food (src/world/, docs/WORLD-EXPANSION.md, which already names the hitch: a patch rebuild is one frame's work, 16k vertices).
Goalpost: 8/10 from the owner
Scored on numbers, not taste, so each round prints the same table from the same recipe (bun run probe mythic-masters --js with the mythicMasters handle; a fixed walk of 90 seconds across a region border at a fixed hour, with a party of one and of six shown):
- Frame time. 95th percentile under 16.7 ms on this Mac's headless Chrome through the whole walk, and no single frame over 50 ms (the patch hitch gone: builds split over frames or moved to a worker).
- Draw calls and memory. Draw calls per frame and JS heap printed and flat across the walk; a party of six adds at most 12 draw calls and 60 MB.
- Load. Time to first walkable frame under 3 s on a cold cache locally, and the bytes it took, printed.
- Phones. The same walk at a phone viewport with the quality knob (
@rustybuns/util/quality) on low stays under 16.7 ms at the 95th; no feature only works at high. - A budget that holds. The numbers live in one test (
test/budget.test.ts) that fails when a round regresses them, so the next climb can't spend them.
The loop
Each round is one PR against main that says "Part of #N" with the before/after table in the body. A fresh judge scores the five points, halves it, and the comment starts Score: x/10 (target 8) and ends Next: ...; then open "rounds N+ (from #N)", close this one with "Moved up to #new". Keep effect out of the per-frame code. At the target, a MANUAL RUN: for the owner's own walk on their phone.
Activity
Mythic Masters: the quality tier sets the renderer, and the open worl…
QuinnsCode commentedon Nov 5, 2026
Point 4 (phones), from Gizmo: #3682. It culls the open world's plants to the camera's view, and the quality tier now sets the renderer and a plant budget (low: full plants within 110 m, cards past that). Cosmo's round has the desktop walk, the hitch and the budget test.
The same 90 s walk, before and now, back to back on main at e558f6c, headless Chrome on this Mac's GPU. Phone is 390×844 at 2× with
?quality=low.The 95th sits on the 60 Hz beat both times on this Mac. Frame gaps here vary from run to run (an earlier run on main read 33.4 at the 95th), so the triangle count, 7× fewer on a phone, is the steady number. The 66–83 ms frames left are the patch rebuild that Cosmo's round is fixing. Phones are still guessed as high unless told
?quality=low, and the phone row isn't in the shared walk yet: #3683.Mythic Masters walking together, round 4: one room per party, shared …
QuinnsCode commentedon Nov 5, 2026
Score: 3/10 (target 8). Round 1, PR #3685. A fresh judge scored 6/10 and that is halved.
Recipe:
cd apps/mythic-masters && bun scripts/walk-budget.ts(90 s at 12 m/s, 11:00, calm weather, region 1 into region 3 at the midpoint; cold-cache load; headless Chrome on Metal).test/budget.test.tsholds it withMM_BUDGET=1.BEFORE (main)
NOW
Judge, per point: frame time 1/2, draw calls and memory 1/2 (no party-of-six row), load 2/2, phones 1/2 (no quality knob yet, Gizmo's PR), budget test 1/2 (desktop limit loose, GPU-only).
Files: mine are
src/world/view.ts,scatterTurfinflora.ts,walker3d.ts, the perf and compile lines inmain.ts,scripts/walk-budget.tsandtest/budget.test.ts. Gizmo has the quality tier and plant culling.Next: cull or LOD the plants (4.3 M triangles drawn unculled), so desktop p95 stays under 16.7 ms every run; then find the creature shader variants still compiling mid-walk (programs 91 -> 135, the 300 ms max).
QuinnsCode commentedon Nov 5, 2026
Moved up to #3686
Mythic Masters: the world's frame budget, round 1 (#3664)
QuinnsCode commentedon Nov 5, 2026
Point 4, second PR from Gizmo: #3689 (Part of #3664, from main, merges clean after #3682). A phone is now guessed as mid at most, not high. The tier steps down a level when the 95th percentile sits over 18 ms for 4 s, and climbs back, no higher than it started, after 20 calm seconds.
The same 90 s walk on main at e558f6c, headless Chrome on this Mac's GPU, no
?quality=. The phone is 390×844 at 2×.Nothing changes on a desktop: the 62 → 98 late frames is run-to-run noise on this shared Mac. I also forced a step: burning 30 ms a frame on the phone page dropped it from mid to low, and 20 calm seconds later it climbed back to mid, with no errors. Left for after #3682 and #3689 merge (the plant budget following a step, one tier read in main.ts): #3683.
Mythic Masters: frame budget round 2, a fair walk (#3664, #3686)
Mythic Masters walking together, round 3: one world clock, shared hun…
Mythic Masters: the quality tier sets the renderer, and the open worl…
Mythic Masters: phones start on mid at most, and the tier steps down …
Mythic Masters: the world's frame budget, rounds 1 to 4 (#3664, #3686, …