FYI, I have just committed to mangos tip a change — the options OptionSendDeadline and OptionRecvDeadline are now expressed as time.Duration rather than time.Time — that is they are relative values rather than absolute times. This change is on tip - the 1.0.0 tag still has the old semantic, in case you need it. Please let me know if you have any concerns (I’ve warned about this change for some time now, and not had any negative concerns yet, so I just went ahead with the change.) - Garrett