Performance Benchmarking [SYNTH-58]

[azaleacolburn]

Task

SYNTH-58

Symptom

No real way to verify performance improvements or check for regressions.

Solution

Use vitest bench to run benchmarks for the:

• MirabufParser
• PhysicsSystem
• SceneRendere

I would be happy to add benchmarks for other systems if need be.

In order to compare performance across commits, simply:

git checkout [COMMIT_ONE]
bun run bench:baseline
git checkout [COMMIT_TWO]
bun run bench:check

Verification

bun run bench runs and outputs reasonable times
bun run bench:baseline writes chromium performance to src/bench/baseline.json
bun run bench:check notes nearly identical performance to the cached baseline without any changes

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Before merging, ensure the following criteria are met:

• All acceptance criteria outlined in the ticket are met.
• Necessary test cases have been added and updated.
• A feature toggle or safe disable path has been added (if applicable).
• User-facing polish:
  • Ask: "Is this ready-looking?"
• Cross-linking between Jira and GitHub:
  • PR links to the relevant Jira issue.
  • Jira ticket has a comment referencing this PR.