Using enableSmartRendering method,when there are 700 data in my grid, I write a data A randomly and let it travel in column to find its location of row.If A is in 700 row,it will cost 7 second to find the row i want.While i use A to search again, it just waste 1 second.So i want to know what have been done in first ergodic so that it can find goal quickly in second time.Please pay attention,my grid has 54 columns and it will cost some time to render 20 data.