... Having said that, I just tried on a cutting edge build from http://www.espruino.com/binaries/travis/master/ and flickering is far, far lower.
BUT it looks like something else is broken - see the issue linked above. I'll get on this when I return.
@Gordon started
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.
... Having said that, I just tried on a cutting edge build from http://www.espruino.com/binaries/travis/master/ and flickering is far, far lower.
BUT it looks like something else is broken - see the issue linked above. I'll get on this when I return.