Is there a performance difference between 'append' vs 'html'?

Question

Possible Duplicate:
What is the difference between .empty().append() and .html() in jQuery?

1. Using jQuery, is there a difference in performance between:

   $('#somDiv').empty().append('text To Insert')
   

   and

   $('#somDiv').html('text To Insert')
   

   ?

2. Also, does one method parse the input as a DOM object before the insert vs simply just inserting? (Meaning, does method simply inject the HTML vs internally creating a DOM object)?

   $('#somDiv').empty().append('text to Insert')
   

   vs

   $('#somDiv').html('text to Insert')
   

   ?