I'm working on this today since kenvandine is out.
It has been discovered that accessing gnomekeyring from a thread is causing these CPU problems.
What I am going to do is move the calls to gnomekeyring to before
gwibber-service starts threads and store that data in mlock()'d
memory. Then, replace the previous calls to gnomekeyring to calls to
access that mlock()'d memory.
I hope to have a branch pushed by end of day for kenvandine to