Is there a way can more fast importMGT() in Adobe CEP?

i used PProPanel in github (https://github.com/Adobe-CEP/Samples/tree/master/PProPanel)

and i try to insert more than thousand mogrt by importMogrt() because of subtitles.

but it's so slow in importMGT function because of load mogrt.

if (mogrtToImport) {
				var audTrackOffset = 0;
				var newTrackItem = activeSeq.importMGT(mogrtToImport.fsName, startTick, vidTrackOffset, audTrackOffset);
				if (newTrackItem) {
					var moComp = newTrackItem.getMGTComponent();
				}
}

this is my code that importMoGRT : function, and it require almost one mogrt as 2 seconds.

is there a way can more fast importMGT?

thank you