Opera version 35.0.2066.37, Ubuntu 15.10. Just in the past few days my browser performance seems to have taken a major hit. Specifically, typing in the address bar is incredibly unresponsive, and switching between tabs is slow.
I only browse with a few tabs at a time (2-9), and I have plenty of system resources (only about 1/4 of my RAM is used, and my CPU load is showing almost nothing.) I haven't modified my system configuration recently. I'm not sure if Opera was updated recently or not to the new "quieter tabs" version.
Anyone else having this same issue? Any resolution or open bug report?