Worker model

Rezi supports three backend execution modes via config.executionMode:

• auto (default): inline when fpsCap \<= 30, worker otherwise
• worker: run native engine/polling on a worker thread
• inline: run native engine inline on the main JS thread

Notes:

• Worker mode with the real native addon requires an interactive TTY.
• Headless tests can use nativeShimModule or @rezi-ui/testkit / createTestRenderer() instead of the real native backend.

High-level goals:

• worker offload when needed, inline fast path when appropriate
• deterministic backpressure when the app cannot keep up
• avoid unbounded queue growth

Related:

• Node/Bun backend
• Native addon
• Event batches (ZREV)