Try restricting yourself to the ASM.js subset of JavaScript and see how things work out for you. JS is capable of supporting Unreal Engine 4 games in-browser by

Try restricting yourself to the ASM.js subset of JavaScript and see how things work out for you. JS is capable of supporting Unreal Engine 4 games in-browser by compiling to ASM.js. Of course JavaScript's dynamic features and garbage collector are going to have an impact on perf. See if you can sidestep them to improve on your results. Another issue you may look at is that we don't have standardized support for SIMD yet (but it's coming soon). SIMD would help a lot for the Mandlebrot set. Try with one of the experimental SIMD implementations and see how that works for you. You're right that I'm not familiar with the profiling features for C# tools, but DevTools' profile recording, flamegraphs, and memory profiling features are better than the tools I used in C++ and Java. =)