Bar charts with text appear to be several times slower to render in plotlyjs 2.1 than they were in 1.58.4. Simple example here: 1.58.4: https://jsbin.com/winiqazavu/edit?html,output 2.1.0: https://jsbin.com/fahedevopo/edit?html,output The 1.58.4 version runs in a couple of seconds for me, where the 2.1.0 takes over a minute. I've tried on Chrome and Firefox. If you remove the text, everything renders quickly on either version.