What is miro.com's frontend technology stack, so I can create similiar canvas application with high performance? [closed]

miro.com freehand.invisionapp.com They both have great performing canvas application. But I couldn't figure out what kind of canvas they are using. I want to create similar infinite canvas application, but I don't want to use svg or 2d canvas. Svg and 2d canvas have performance issues when canvas gets a lot of objects and/or canvas size gets big. But both of these applications (miro, freehand.invision) are performing really great. So, what technology should I invest to create similar application?