excessColumns causes a performance bottleneck

Hi, As virtulization causes to show white spaces when it is scrolled horizontally, used the following gridOptions excessColumns: 150,virtualizationThreshold: 15, to render all 110 columns. Since, it renders all the columns during initial time, it increases the initial rendering time. Is there a way where we can render partially during the initial time and the remaining grid in an asynchrenous call? is it possible with current version? Please help us. This is performance bottleneck.