In jQuery procedure Sizzle.getText is called, which eventually returns property elem.textContent. In IE10 this last statement takes about 26 seconds for our case while the same statement in chrome takes about 6 ms.
It seems strange that IE10 takes this long to return the textContent of a node, but why is this necessary in the first place?
The purpose of var text = jQuery(node).text() would be to get the text of the node. I think it would suffice to state var text = node.childNodes.nodeValue instead of var text = Query(node).text(), because the text is in the node itself, and it's not necessary to get the text from its descendants, because it has no descendants.
In our case this modification improves the duration from 25915 ms to 8 ms in IE10.