VR Example: Investigate R2 performance

[gkjohnson]

Likely related to matrix update performance and copying results from IK.

https://developer.mozilla.org/en-US/docs/Tools/about:debugging

[gkjohnson]

Seems to be related to to the number of objects to be rendered. Robonaut contains 71 meshes. Possibly reusing a single material could improve performance.

[gkjohnson]

Model Stats

Robonaut

• 92 unshared materials
• 13 unique textures including no texture (9 represent a solid color)
• 2 unique material colors
• 71 meshes / geometry
• total of 346,474 triangles (min 120 triangles, max 31,462 triangles on a geometry)

Curiosity

• 81 unshared materials
• 7 unique textures including no texture
• 3 unique colors
• 89 meshes / geometry
• total of 53,578 triangles (min 10 triangles, max 8,737 triangles on a geometry)

Plan

• Process models on download so they share as many materials as possible
• Convert the models to skinned at run time to improve performance
• If performance issues persist then decimate the geometry at run time

[gkjohnson]

Anecdotally the performance is significantly improved.

After Merge

Robonaut

• triangles: ~300,000
• draw calls: 14 (down from 92)
• render call: ~9-11ms (down from 23ms)

Curiosity

• triangles: ~36,000
• draw calls: 9 (down from 127)
• render call: ~7-8ms (down from 29ms)