What if I need top performance? The only real alternatives are JavaFX or moving off the browser completely (native app). Despite many man-years put into optimis

What if I need top performance? The only real alternatives are JavaFX or moving off the browser completely (native app). Despite many man-years put into optimisation, JavaScript is still nowhere near in performance. Yeah, I know in some lucky microbenchmarks from Google or Mozilla it can be only 2-4x slower than Java and it is pretty impressive but why do many real JavaScript games/programs struggle on modern hardware as if it was an old Pentium II (see: bombermine [1], quake JS demo [2], circuitlab [3]) or Java applet in year 1998? The only thing that make them look acceptable is that hardware is extremely fast these days. [1] about 25 FPS with random hiccups on my Core i7 Quad @ 2.4-3.5 GHz and proprietary NVidia drivers and Google Chrome [2] https://semitwist.com/articles/article/view/quake-shows-javascript-is-slow-not-fast https://semitwist.com/articles/article/view/quake-shows-java... [3] about 100x slower than old Berkeley Spice (early 90s technology), despite much less accurate models and using similar algorithms (sparse LU decomposition + Newton Raphson)