[erik-kallen]

I think the tools fill different purposes, so integration with JSIL is absolutely a possibility in the future. I did not do any speed comparisons, I just translate what you write in C# to the equivalent script, so if you write a fast script it will be fast, if you write a slow script, it will be slow :)

[azakai]

Well, how you create data structures might matter for performance - if you turn C# structs into JS typed arrays for example and do the proper conversions, that could be much faster than simple JS objects or even arrays.