Records the queue/service split for one gated request and stamps it on the response.
ahead is a count taken at arrival (no clock), the quantity a replica pool reduces. The two
durations are floors: the clock only advances during I/O, so a synchronous php._run() adds zero
to a Date.now() delta (a cold fill read 117 ms for 1,398 ms of cpuTime). Quote them as lower
bounds; absolutes come from the client's clock and cpuTime.
Records the queue/service split for one gated request and stamps it on the response.
aheadis a count taken at arrival (no clock), the quantity a replica pool reduces. The two durations are floors: the clock only advances during I/O, so a synchronousphp._run()adds zero to aDate.now()delta (a cold fill read 117 ms for 1,398 ms ofcpuTime). Quote them as lower bounds; absolutes come from the client's clock andcpuTime.