Previously every visible plate polled C_Spell.UnitCastingInfo each throttled
tick just to detect casts. Now cast state is event-driven:
- SPELL_START_OTHER (nampower) stamps a per-GUID castState cache (spellId,
timing, channel flag from spellType); SPELL_FAILED_OTHER clears it; normal
completion expires at endTime. GetCastInfo just reads the cache, so all
call sites (castbar update, non-target detection, casting name-color) stop
polling.
- plateByGuid routes events to plates in O(1) and bounds the cache to on-screen
casters; NAME_PLATE_UNIT_ADDED seeds an already-casting unit with one poll.
- The vestigial nameplate.castUpdate flag now fires on cast start to bypass the
throttle for an immediate bar.
With the poll gone, per-tick work is a cache read + SetValue, so the dedicated
target castbar frame now runs unthrottled (every frame) for the smoothest
sweep, and the non-target nameplates_castbar default rises 50 -> 100 FPS.
Known limits: other-unit cast pushback isn't reported by nampower, and a
mob-cancelled channel with no fail event lingers until endTime.
The cursor-follow OnUpdate polled GetCursorPosition() 10x/second forever,
even with no tooltip visible. Rework it so the follower frame is created
once, hidden, and only shown while a tooltip is up -- an OnUpdate fires only
while its frame is shown, so the poll now runs solely during tooltip display.
Position the follower immediately on show to avoid a one-frame flash.
Also bump the tooltip_cursor throttle default from custom/10 FPS to the
fastest preset (50 FPS) so cursor tracking is smooth out of the box while
the Throttling tooltip knob stays available for low-end machines.
Brues