SERVER-132626 improved queuing time fidelity by tracking totalTimeQueuedMicros per-admission gate, rather than reporting only execution control and flow control wait times. As a consequence of the AdmissionContext registry design, this means we're walking a list of admission context pointers and adding their individual queue wait times per operation , which was surfaced as a performance regression in BF-45408.  This ticket tracks the work to claw back performance.