Perf: Improved timing facilities with more choices and better doc.
Perf: Re-wrote PerfTest to be time based and more accurate.
Utils: format utilities are a bit less stupidly implemented.
Utils: Fixed compile errors related to the new perf utils.
Utils: Added a shorthand sleep function.
Utils: Migrated the queue perf test.
Utils: Perf now correctly adjusts the record latency per op.
Utils: Migrated the tls test.
Utils: Tweaked the output of the perf test.
Utils: Migrated the rcu perf test.
Utils: Migrated the alloc perf test.