Sure, give me the exact command you're executing so that I can do it here.
No command needed, just type:
sudo perf stat -a
and immediately exit with ctrl+C. That will give you a glimpse. See "% of all branches" next open firefox, rerun the same command after firefox launches and immediately exit with ctrl+C On that piece of crap I get branch-misses above 10% from boot without executing anything and perf does not like it so it displays it with red colour. On my quad core kabini APU, in order to get 9% branch-misses I have to open 50 tabs on firefox. Something is terribly wrong here.

Out of pure interest: do you remember how exactly you did reproduce this
issue?
Yes, using Ubuntu 16.04 will just crash everything! For example I had crashes with the software updater program. Moreover firefox would become unresponsive even with one tab. Luckily initial tests of 16.10 seem promising as it is lighter and consumes 3~5% less RAM! Debian which was lighter was more responsive and had no crashes except an oops from adobe flash. I believe that the bug is triggered by the unusually high branch-misses specific to this machine. After the fix, I got better OS and program responsiveness.

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