Squash of 27 work commits (Sep 3–12):
aa907ca platform: a frame trace on both desktop backends, and a window that cannot present stops ticking at 600 Hz
e3abf4d map: the hosted-tile cache keeps the same ~2x-visible margin as the local one — a budget pinned at the visible set evicted the trailing edge of every pan on the next frame and refetched it a moment later
8d542fe platform: a child pass orphaned by its attaching draw list is no longer painted — the window's gauss_scene pass stayed a live_with_parent child after the map went flat and re-encoded a frozen 400-item list every pan frame with stale geometry ids (new tile meshes × old instance counts, tens of millions of triangles into a texture nobody read); make_child_pass records the recording list + redraw id, stale passes are skipped, a cached View re-attaches on a cache hit; tests for the orphan gate and the pool generation contract
bb49fe6 map + platform: retained per-tile draw lists — each resident tile owns one DrawList2d per carto pass (fill, casing, stroke, icon, icon-high, shadow) and the label glyph batches are retained the same way, recorded when the bake, LOD ring, fringe/icon gates, flat/tilted or clip change and re-attached otherwise; a pan/zoom/tilt frame pushes this frame's uniforms onto the retained calls (DrawVars::update_uniforms_on_area, resolved slot table) and uploads zero instance bytes; the tilted per-pass depth is a pass_depth uniform; a held list's zbias resolves at entry (zbias_hold in every backend); the shimmer heartbeat patches shiny_time in place without a redraw; a freed/reused sub-list id is skipped by every draw-tree walker and the mask list re-records empty on the flat transition (contract test). Web pan tail 1,098 → 20 MiB/s, flat pan 2.4 → 0.43 MiB/frame; Metal grabs within the run-to-run noise floor
313265d Studio code atlas: geometry code views, live filter, 3D size lens, lanes as terminals
9c4e0cc Studio code atlas: performance round — retained uploads, worker labels, exact search, no forks
7235d7e Studio code atlas: stall fix, GPU working set, lens hard switch, filter masks, parallel index
56a6da5 platform: per-pass GPU counter timing on Metal; retained publications replace in place
72e2443 platform: present-path trace (1 Hz cause histograms), bounded drawable wait and retirement on macOS
1c5d583 platform: bounded retained maintenance on empty paint beats; republish actual backend debt
edfed73 platform: retained residency high/low water and hysteresis; no distance eviction without pressure
acab6a0 platform: critical upload class serves present-blocking items first; identical immediate re-records upload nothing
906c774 platform: uniform_range on DrawVars and patch_retained_uniforms on retained draw lists
c29031c platform/draw/widgets: heap-keyed script resources and RecordingBuffer draw items — the files today's commits depend on
cd0964f platform headless: homogeneous near-plane clipping before the perspective divide
61d424d platform: release retained bindings of released textures so pool evictions complete
a00287a platform: texture-tile cache support — per-item instance ranges, painted pass receipts, display-dpi pass uniform, retained render targets, present gate on the drawable pool
74b63be platform: retained upload floor reverted, unconfirmed presents counted
c03fcc5 platform: tile-cache round 3 support — O(1) demand on re-recorded lists, evictions counter, allocated_size, lost-button release, Vec2d::round
e515d75 platform: shared instance publications — the DL-0/DL-1 contract, additive beside the retained path
142a337 platform: shared instance publications — close the seven review items (DL-1b)
6811a19 platform: Debug for SharedInstances, WeakSharedInstances and PublishReceipt
c061e47 platform: Metal draws are resident by construction — the hole path and its gates are gone (DL-2)
0bdbb29 platform: drop the unreachable InstancesNotResident present cause
de3c868 platform: `drawlist` trace names the holder of a stale draw-list id; the per-frame upload line moves to `gpu.upload`
721c3d8 platform: publication backends — Metal per-publication backings, lease-keyed uniform ring, receipts on every backend, Vulkan draws attached items (DL-3)
393de54 platform: integrated deletion — the draw-list system is generic again (DL-5)
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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