webview_threading

Summary

VS Code webviews run JavaScript on a single main thread, like a browser tab.
Heavy synchronous work — cytoscape layout iterations, large element builds, unbounded loops — blocks UI updates until it finishes.
Layout iteration count scales with node count ( capped ) rather than running unbounded defaults.
Do not restart layout synchronously on layoutstop; hand off to the graph-physics simulation, which integrates one step per requestAnimationFrame instead of blocking.

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