I use jqgrid with the virtual scroll and with a local datatype, my problem is that after the scroll, the new data are well loaded, but the old ones are not removed. The view slowed down as the scroll progressed.
Since virtual scrolling is very sensitive and for us is not possible to reproduce the client problems when this settings is on – it is much better to send us a demo with data and detailed description of the problem.
You can also send us a link to the problem.
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But scrolling is not fluid, the new datas are loaded when the position of the scroll is equal to the page. Visually one sees empty space, then the lines appear. Is there a solution for preloading data? for example: start scroll from page 1 to page 3, when you get to 20% of page 2 on load page 3 …