DetailsManagerConnector.refreshDetailsVisibility() slows down with larger grids.

[Legioth]

Every time the users scrolls a Grid so much that a new row is rendered, DetailsManagerConnector.refreshDetailsVisibility() is run as scheduleFinally. This method iterates through the entire size of the data source, which really slows things down for a large grid.

With 500 000 rows in Grid (disregarding #6290), this causes 200ms delays while scrolling. There are also messages in the Chrome console about e.g. [Violation] 'readystatechange' handler took 249ms. These are only visible with the Verbose logging level in Chrome.

[stale]

Hello there!

It looks like this issue hasn't progressed lately. There are so many issues that we just can't deal them all within a reasonable timeframe.

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[stale]

The issue was automatically closed due to inactivity. If you found some new details to it or started working on it, comment on the issue so that maintainers can re-open it.