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? > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
