the hover tax is pinned and cut, and a spell-less macro is a button

- a tooltip change costs ~1.3 ms — five whole-interface recomputes, each working as designed: the quad re-convert at 474 µs, the Lua tick at 287, the layout resolve at 200, bevy's `Assets<Mesh>` tax at ~270 and the mesh rebuild at 146 — pinned with new hover probes (a jitter dial, a `WOW_PROBE_HOVER_DUTY` duty cycle so run drift cancels, an `AssetChanged` tax meter), and the layout preamble's two whole-roster scans become lists maintained at the writer (52–83 µs → 1–11)
- the splice compared this frame's entries against last frame's by index, so one inserted highlight shifted the 160 entries behind it and read as "everything changed"; it now aligns on `z` — an identity, not a position — and a `Text` entry that writes only quads became spliceable, so a tooltip change re-converts 22 entries instead of 520 (`convert` +439 µs → +107), with `WOW_UI_SPLICE_VERIFY` running the full conversion behind every spliced frame: 0 mismatches over 1,078
- a spell-less macro is a usable action button, not the 0.4 grey — the reference's usable compute has a dedicated leg answering usable for the bound-spell zero, cross-checked at the bytes in the reference's disassembly — and the button's Name line is written unconditionally from `GetActionText` as the reference does, so the macro's name sits under its icon and a `/cast` of a spell the character does not know now greys, which is also 1.12's behaviour (B340)
- a capture bounds its run in wall-clock seconds, because a frame cap is no cap at the ~1 fps a starved `nextDrawable` leaves — 1800 frames is thirty minutes there — and the teardown backstop runs on every run as a liveness guarantee, carrying the exit code the run asked for; the Multisampling row reads Off / 2x / 4x, since "1x" contradicts the no-multisampling byte both of the reference's enumerators normalise to and the bit-depth prefix was identical on every row

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/benilla-ui/src/script/tooltip/mod.rs

@@ -671,16 +671,16 @@ fn cell(model: &Model, rh: crate::widget::RegionHandle) -> Cell {
 /// frames whose lines haven't been measured yet (the XML default size holds until the measure
 /// round-trip lands, one frame later — the same convergence the Lua loop had).
 pub(super) fn layout_tooltips(model: &mut Model) {
+    // The arena's tooltip registry, not the resolve's whole frame roster: this pre-pass runs at
+    // the top of EVERY resolve, and finding two or three tooltips by scanning ~4000 ids was most
+    // of what it cost (decision 1634). `frame_to_id` still gates each one — a tooltip outside the
+    // resolve's roster would mint an id here and take the ledger's conservative branch with it.
     let tips: Vec<FrameHandle> = model
-        .frame_to_id
-        .keys()
+        .arena
+        .tooltip_kinds()
+        .iter()
         .copied()
-        .filter(|&h| {
-            matches!(
-                model.arena.frame(h).map(|f| &f.kind_state),
-                Some(KindState::Tooltip(_))
-            )
-        })
+        .filter(|h| model.frame_to_id.contains_key(h))
         .collect();
     for h in tips {
         let (num, lefts, rights, min_w, pad_w) = match model.arena.frame(h).map(|f| &f.kind_state) {
@@ -767,7 +767,14 @@ pub(super) fn tick_fades(lua: &Lua) {
     let mut finished: Vec<FrameHandle> = Vec::new();
     {
         let model = lua.app_data_ref::<Model>().expect("model app_data");
-        for &h in model.frame_to_id.keys() {
+        // The arena's tooltip registry (1634) — this runs every tick, and the roster it used to
+        // walk is ~4000 entries at a corpus UI. The `frame_to_id` gate is kept: `hide_tooltip`
+        // below writes layout, and a frame outside the resolve's roster takes the ledger's
+        // conservative branch.
+        for &h in model.arena.tooltip_kinds() {
+            if !model.frame_to_id.contains_key(&h) {
+                continue;
+            }
             let Some(frame) = model.arena.frame(h) else {
                 continue;
             };