The post-refresh drag stops lurching: ark's state persistence was the stall. Every _save() — fired dozens of times during a boot reconcile — did a JSON.parse of stored state, a merge over every vtxo and movement, a JSON.stringify, a synchronous localStorage write, and saveCache(). A CPU profile of the first 9s pinned it: ~230ms in saveFeatureState/loadFeatureState/setItem bursts blocking the main thread, which delayed the mouse drag's scrollLeft writes (mouse drag is main-thread; touch scrolls on the compositor). The in-memory state is always current and every live read uses it, so the disk write is now coalesced — immediate when idle, one write ~200ms after a burst settles (800ms cap), flushed on page-hide and wallet switch so nothing is lost

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01MrkLsNScXe9b6BviUSdmMr

0 files changed, 0 insertions, 0 deletions