我的查询太慢了

Question

我的查询太慢了。这需要一分多钟。如何快速创建查询？ 你能救我吗？

function onOpen() {
 var menu = [{name: "Jump to today's date", functionName: "jumpToDate"}];
 SpreadsheetApp.getActiveSpreadsheet().addMenu("Custom", menu);
 jumpToDate();
}

function jumpToDate() {
 var ss = SpreadsheetApp.getActiveSpreadsheet();
 var sheet = ss.getActiveSheet();
 var range = sheet.getRange("C:C");
 var values = range.getValues();  
 var day = 24*3600*1000;  
 var today = parseInt((new Date().setHours(0,0,0,0))/day);  
 var ssdate; 
 for (var i=0; i<values.length; i++) {
   try {
     ssdate = values[i][0].getTime()/day;
   }
   catch(e) {
   }
   if (ssdate && Math.floor(ssdate) == today) {
     sheet.setActiveRange(range.offset(i,0,1,1));
     break;
   }    
 }
}