Optimization killers

[LesJ]

See this document in particular these two sections:

3. Managing arguments, and
5. For-in

I see many places in the Ext JS code base where the arguments object is passed where it doesn't need to be passed.

This article states "The arguments object must not be passed or leaked anywhere."...

Do you think this code could be optimized?

Ext.define('Ext.button.Button', {
    ...
    initComponent: function() {
        ...
        me.callParent(arguments);
        me.callParent(); // <-- Use this instead?
        ...