Delegate Ext.Object.chain to Object.create

[LesJ]

This is a performance improvement suggestion.

Ext.Object.chain could be delegated (on supported platforms) to Object.create. This would improve performance.

Object.create
Ext.Object.chain

Try this test. You will see that Object.create is at least 50% faster.

EDIT
Also, see this similar delegation Ext.Object.getKeys --> Object.keys

var obj = {
    key1: 'xxx',
    key2: 'yyy',
    key3: 'zzz',
    key4: 'www',
    key5: 'aaa'    
}

console.time('chain');
for (var i=0; i<10000; i++) {
    Ext.Object.chain(obj);
}
console.timeEnd('chain');

console.time('create');
for (var i=0; i<10000; i++) {
    Object.create(obj);
}
console.timeEnd('create');

*** EDIT 5/18/12
See how the Compose library checks if Object.create is available.