I am experimenting with using Emscripten generated code in my Javascript application. The results are pretty disappointing performance-wize. I am seeing 40x slower on Chrome 49.0.2623.110 (compiling with emcc -o3) versus a release build on visual studio.
I have a fairly straight forward marching squares based geometry generation function, running in a plain EXE complied with visual studio in release mode, the function call takes around 2.5ms (as reported by QueryPerformanceCounter), the identical function run in my javascript appliction takes 90-100ms (measured by Date().getMilliseconds()). I have verified the time scales roughly with the size of the problem, so it's not just setup/JIT cost. My compile line is this; emcc DCEL.cpp MS.cpp Blob.cpp -o html/Blob.js -O3 -s EXPORTED_FUNCTIONS="['_Blobify','_Init']" I realize there is no native code support on this version of Chrome, but is this expected? Am I missing an optimization step? -- 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.
