It'll definitely get slower, however in this case we're actually doing the work on the PC before upload to the Bangle.js, so I don't think it'll be that big a deal for us. On Bangle.js itself this could be a complete pain though.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It'll definitely get slower, however in this case we're actually doing the work on the PC before upload to the Bangle.js, so I don't think it'll be that big a deal for us. On Bangle.js itself this could be a complete pain though.