Web multiplot dynamic chart ehit high data points

I´m using canvasjs library to make an ECG graph. The goal is to make it work with 12 leads yet whe I use so much data plotting goes very slow. I need to be able to show the graph on a website, therefore I need your help to make it work correctly. If canvas is not the appropriate code you can propose hopping is a free siftware Here is the code [login to view URL] to run a simulation, the html file has comments with the program operation. If you are not certain what an exg is or the rythm check this video: [login to view URL]