Thanks for digging in ;) We just released RunMat in August as an open-source, fast MATLAB runtime. The goal is to make it the fastest way to run math, period.

Coming from Octave, you'll notice significant speedup advantages, you can see some of our benchmarks with it here https://runmat.org/blog/introducing-runmat

Last month, we put out 250+ built-in functions and Accelerate, which fuses operations and routes between CPU/GPU without any extra code/memory management, i.e. no GPUarray.

We're still flushing out the plotting function, but we'll have updates to share around that and a browser version very soon.