I need to add a lots of records into an extjs data store dynamically by looping. But store.add takes normally much time. Is it possible to add these data togetherly?
You can use store.loadData() or store.loadRecords() methods:
var mydata = [
[1, 'John', 'Smith'],
[2, 'Fred', 'Jones']
];
store.loadData(mydata, false);