callTiming() function

Splits a call's round trip from the request a client sent and the response it was answered with.

Signature:

export declare function callTiming(request: Partial<IMQRPCRequest> | undefined, response: Partial<IMQRPCResponse> | undefined, answeredAt?: number): IMQCallTiming | null;

Parameters

Parameter	Type	Description
request	Partial<IMQRPCRequest> \| undefined	the request as the client sent it, carrying `sentAt`
response	Partial<IMQRPCResponse> \| undefined	the response as it arrived, carrying `timing`
answeredAt	number	(Optional) when the answer arrived, by the caller's clock

Returns:

IMQCallTiming | null

the split, or null where either side did not record its half

Remarks

Each figure is a difference of two readings of one clock — total the caller's, handled and waited the service's — so clocks that disagree between hosts move no figure. transit is what is left, and is where a busy caller, a busy broker and the size of a message show.

Call it from an afterCall hook, which runs as the answer arrives.

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