如果此排列
loadArr.push({url:HitNum1URL,type:Loader.ATLAS,priority:1 });
loadArr.push({url:HitNum2URL,type:Loader.ATLAS,priority:1 });
loadArr.push({url:HitNum4URL,type:Loader.ATLAS,priority:1 });
就HitNum1URL为loader callback cost a long time:2169
如果此顺序
loadArr.push({url:HitNum2URL,type:Loader.ATLAS,priority:1 });
loadArr.push({url:HitNum1URL,type:Loader.ATLAS,priority:1 });
loadArr.push({url:HitNum4URL,type:Loader.ATLAS,priority:1 });
就HitNum2URL为loader callback cost a long time:2169
最后总结 就是先最前面,先为最长时间