Original Post from Ilya Grigorik: Nice under-the-hood look at IE's latest JavaScript (Chakra) engine. JIT and GC improvements, and much more... great stuff! Yay for faster JavaScript (and more response UIs). The Windows 10 Technical Preview brings key advances to Chakra, the JavaScript engine that powers Internet Explorer and store based Web apps across a whole range of Windows devices – phones, tablets, 2-in-1's, PC's and Xbox. As with all previous releases of Chakra in IE9, IE10 and IE11, ... - mjc