Track B. All 21 one-shot cues funnelled through FeedbackFx.PlayClip ->
AudioSource.PlayClipAtPoint, which allocates a GameObject + AudioSource per call
and schedules a delayed Destroy — ~20-33 times a second in light combat. New
OneShotAudioPool is a 32-voice 3D ring behind an UNCHANGED PlayClip signature, so
all 20 consuming call sites are untouched.
Parity is the whole game here: PlayClipAtPoint sets spatialBlend = 1 explicitly (a
fresh AudioSource is 2D) and leaves the rest at stock defaults. Two deliberate
divergences, both forced by the voices being long-lived: playOnAwake = false, and
dopplerLevel = 0 because a pooled voice TELEPORTS between events and would
otherwise pitch-bend. Root is DontDestroyOnLoad (WorldLauncher does
LoadScene(Single) while the client world is alive) with a SubsystemRegistration
reset, or session two rents destroyed voices.
Authored impact VFX are pooled per prefab instead of Instantiate/Destroy per hit:
components cached per INSTANCE (refs are instance-scoped), main.stopAction forced
to None (a prefab set to Destroy silently drains the pool), instances filled under
an inactive root so Awake/Start never run — which is what makes the DestroyImmediate
in StripCosmetic safe — ps.Clear before Play, TrailRenderer.Clear after the
reposition, and a Rented flag as the at-most-once guard against a double Return
aliasing one instance to two callers.
Per-frame allocation: the slash-arc and enemy-wedge mesh builders each allocated
four arrays on every call (up to twice a frame, and once per winding enemy); HUD
and ability-bar labels rebuilt their strings every frame; damage-number fades
rewrote TextMesh vertex colours every frame; health bars pushed uGUI writes
unconditionally; two systems played back an empty EntityCommandBuffer (a
structural-change sync point) every frame.
Also closes an AudioClip leak across all seven clip-owning systems: an
AudioClip.Create'd clip is a standalone UnityEngine.Object, so destroying a
system's FX root left it alive (MusicSystem ~6.8 MB, AmbientAudioSystem ~2 MB per
client-world teardown).
CombatFeedbackSystem's TryHold call sites go with this commit because they share
the file; the camera-side removal lands in the next one.
Verified live: PlayClipAtPoint's "One shot audio" GameObject never appears again
across 270 frames of combat with kills; the VFX pool fills to its retain cap and
stabilises; real cues route through the ring. 304/304 EditMode green.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
kronic
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