[xenophonf]

You wouldn't happen to be running Tab Session Manager, would you? That was causing me all sorts of performance problems on both PCs and Macs, and I only tracked it down by disabling all extensions and themes and then incrementally re-enabling them.

[geist]

I am not, although you did remind me to try without any extensions enabled again. I can't do a straight comparison as I'm at work now, but my work laptop (2017 vs 2016) is showing improvements. For reference, my work laptop also had high CPU usage on previous releases (even with no extensions), so there's hope yet. Although not being able to use the extensions I normally use would be a deal breaker (blockers and such)