On Tuesday, January 3, 2017 at 11:45:22 AM UTC-8, Charles Vaughn wrote: > > Do you have example code? Using emscripten::val with strings will have a > very high overhead in terms of moving strings into and out of the > Emscripten heap. If you're just looking at exposing large homogenous arrays > of int's/floats/doubles you can use ArrayBuffer based views into the > Emscripten heap. > > On Thursday, December 29, 2016 at 5:12:36 PM UTC-8, ExBigBoss wrote: >> >> So today I was writing an embound module and all it really did was set >> the i'th property of an emscripten::val with the i + 1'th value. This was >> done in a for-loop and in vanilla JS, I used simple for-loop with the >> native array and its push method. >> >> Basically, I just wanted to test how fast I could fill an array using >> Emscripten vs vanilla JS. >> >> However, I noticed that my code was 10x slower using emscripten::val! And >> this was done with the -O3 flag being set as well. Using the default >> wrapper around std::vector, I was able to generate asm that was 3x as fast >> as vanilla JS but unfortunately, it doesn't play well with the standard >> vector. >> >> I'm really just wondering, has anybody else noticed poor performance when >> Emscripten and external JS inter-operate with each other? >> >
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