varnish time it takes for a request

[Admin Beckspaced]

hello again dear varnish community,

if i look at the varnishlog I see lots of timing information, e.g.

-   Timestamp      Start: 1478537654.083406 0.000000 0.000000
...
-   Timestamp      Req: 1478537654.083406 0.000000 0.000000
...
-   Timestamp      Process: 1478537654.083552 0.000146 0.000146
-   Timestamp      Resp: 1478537654.149267 0.065862 0.065716
-   ReqAcct        456 0 456 297 117701 117998

what would be the best way to find out how long a single request took in 
total?
start from the client request until the delivery is done.

how would i find that one out?

thanks, greetings & all the best
becki