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  1. Got challenged the other day by trying to scroll large numbers of rows in a listbox. Browsers are very good at scrolling, but when row numbers become large and the scroll context becomes complex, scroll behaviour deteriorates. A simple un-optimised scrolling div is, rule of thumb, able to scroll comfortably up to a couple of hundred rows. Depending on browser and complexity. In the native framework I tweaked that a bit by setting all rows outside the visible viewport to 'display:none'. That extends comfortable scrolling somewhat, say to numbers in the low thousands. A bett
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