A geometry-cache hit moved every vertex vector out of the cache into the draw
(deep copy of positions/normals/uv/diffuse/indices/bones each frame). The cache
now lends its vectors to the frame's first draw of that geometry and takes them
back in Render3DBeginFrame; later draws of the same key+revision in the frame
(terrain splat layers, shadow-map pass) are marked shared_geometry and carry no
vectors -- the native host looks the GPU geometry up by key+revision, and draw
captures expand them (Render3DExpandSharedGeometry). Index reads reuse a scratch
buffer. Desktop live game: RenderGame rnd 1.7 -> 1.2 ms, no visual change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
