content management system - is there any difference in load time for /images/img.jpg vs //domain.com/images/img.jpg vs http://domain.com/images/img.jpg -

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we had issue our navigation menu images not using https on otherwise secure contact page (sporadically) , suggested changing path , removing protocol , domain name images load without further issue, since developer working on problem had trouble reproducing it. removed protocol left domain name intact, work, brought question i've been wondering awhile , not being able find definitive answer. question: there difference in load time file path /images/img.jpg vs //domain.com/images/img.jpg vs http://domain.com/images/img.jpg.

i'm leaning towards first 1 possibly being faster since might not have domain lookup, don't know, brought me here...


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