Re:Performance of ES6 features relative to ES5
by nostrademons on Tuesday March 01, 2016 @01:34PM
(#11204897)
I'm not sure this is true anymore even in this case - with multicore processors, cache dependency, and pervasive virtualization, the speed of your program can be significantly affected by what else is running on the box. Remember that the x86 itself has a JIT on the chip, converting x86 machine code to whatever microcode the processor uses. When I was at Google, they provided special dedicated machines for benchmarking, with custom run-times that disabled a lot of the containerization/virtualization features, and there was still a lot of noise in benchmark times.
[ Parent
| on HN ]
Re:Performance of ES6 features relative to ES5
by acdha on Tuesday March 01, 2016 @02:08PM
(#11205192)
That's certainly true and I hope I didn't give the impression that I thought this was a binary situation. It's just that code which runs in a JITed environment, particularly one like the browser JavaScript runtimes which aren't even versioned, has an even wider exposure to skew. Everything running on a multiprocess/user operating system is exposed to resource contention but e.g. your JavaScript code also has to worry about things like Chrome disabling optimizations anywhere you use try/catch.