Debugging state synchronization issues in real-time tracking tables
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Hey everyone!
I’ve been knee-deep this week in optimizing front-end state management for a real-time data table, and I ran into a frustrating bottleneck that I'm curious how others have solved.
Specifically, when polling or receiving high-frequency updates for fast-changing data sets (like live status grids), re-rendering the entire DOM tree causes noticeable input lag on mobile browsers, even with memoization.
Are you guys relying more on virtualized lists (like TanStack Virtual) to handle heavy DOM rendering, or shifting toward Web Workers to process payload diffs off the main thread?
Would love to hear what architecture has worked best for keeping your high-frequency UI components buttery smooth!
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I'm with Leonard that the shape of the updates matters more than the renderer. My old app re-fetched every item on a timer, and the new one flips that: each running job is one record, and the screen listens to that record only, so a change touches one row and nothing else rebuilds. In a grid the same idea means keeping state keyed by row id, so an update replaces one entry and only that row's component re-renders, instead of a new array that makes everything compare itself. If updates come faster than the eye can see, I'd also collect them and apply once per animation frame. Those two together usually get you most of the way before a worker is worth its complexity.