[etrinh]

This. To my knowledge, JS perf isn't an issue in any modern browser (even the crippled iOS webview). Improving the performance of DOM access and manipulation (not just on iOS) would be a much more fruitful enterprise and is something I would like to see all browser makers focusing on.

[malandrew]

A million times this. XML at the end of the day is a language with only two types, strings and children. This is woefully inadequate if you want performance.

Take a 3D matrix transform for example. It needs to be marshalled from an array of floats to a string to be applied. Then it needs to be parsed back into an array of floats to be used to position a texture in the GPU. Such a huge waste...