use createDocumentFragment

[fbender]

Creating the DOM tree with createDocumentFragment() and later add it to the actual DOM will bypass expensive Layout operations for each DOM method (Layouting is done only once during inserting the fragment into the actual DOM). This will speed up things a lot.

Plus, sometimes I want to prepare a DOM fragment and only add it later to the DOM tree. This is only possible with the aforementioned method.

[jed]

i tested domo using createDocumentFragment and didn't see much of a speed increase. can you make a test that shows this?

(note that the dom nodes are only appended to the document after creation, so there shouldn't be any layout overhead)