> For much, NaCl has a 2x perf penalty (v. native C++) Huh? From the NaCl paper: "The worst case performance overhead is crafty at about 12%, with other bench

> For much, NaCl has a 2x perf penalty (v. native C++) Huh? From the NaCl paper: "The worst case performance overhead is crafty at about 12%, with other benchmarks averaging about 5% overall." How do you get from 5% to 2x (100%)? > asm.js already, despite being brand-new, for much has a 2x perf penalty: equal with NaCl Have you actually run the same benchmarks on both and found them equal? According to this comment no such benchmarks have been performed yet (at least by azakai): http://news.ycombinator.com/item?id=5228737 http://news.ycombinator.com/item?id=5228737 If not, declaring it "equal" seems a bit premature.