[bunkat]

It doesn't appear to have gotten much better in this version. I took a peek at the new bubble chart (via their link to a jsFiddle) and it took about 7 seconds to render. I'm drawing similar charts using d3 with 800 data points that render in under 300 ms.

[TorsteinHonsi]

That's 7 seconds waiting for JSFiddle, not Highcharts. In my Chrome browser, Highcharts renders 800 bubbles in under 200 ms: http://jsfiddle.net/highcharts/hAyzq/