How JavaScript works: the rendering engine and tips to optimize its performance
This is somewhat off-topic, but has anyone here used SessionStack?How well does the service work, and is there a noticeable performance impact for the software to record on mid-range mobile devices?It looks really interesting and would probably be really helpful, but I can't include anything else in our applications that will further tax our already struggling lower-end devices with more code that needs to run and more data that needs to be transmitted.