Chrome slower when console open at page load

Question

1 Load page with webgl --fast.

2 Open console --slower, 60fps but spikes of much lower

3 Refresh with console open -- Page starts to drop to a crawl, like not many fps.

4 close and reopen console log -- Page responds similar to #2

What is causing me to need to re-open console.log -- syntax highlighting or async debugging?

Answer 1

I had also problem with slow page loads when Devtools was open. In my case images and ajax loads were extreme slow. The only way I could speed is up is to disable async stack traces in the Devtools preferences.