Network Time "waiting for response"

Brainwalk

unread,

Dec 20, 2009, 6:12:44 PM12/20/09

to Firebug

How is it possible, that Objects (Images in HTML) are loaded faster
then the Round Trip Time to the Server is?

Theoretical: Browser sends Request to Server (minimum 1/2 RTT), Server
sends Reply to Browser (minimum 1/2 RTT). So the minimum Time for
"waiting for Response" is at least RTT + Handlingtime on the Server.

Sometimes i have Objects loaded in 4ms, how can that be? RTT ist
abolut 54ms.

FYI: cache deactivated, Firefox in privat-mode, Compressing
deactivated, permission.default.image is 3, prefetching and pipelining
deactivated

Where i get the images so fast? Or how so fast?
Any ideas?

Rob Campbell

unread,

Dec 21, 2009, 7:45:29 AM12/21/09

to Firebug

Are you viewing cached response times?

Honza (Jan Odvarko)

unread,

Dec 21, 2009, 8:50:17 AM12/21/09

to Firebug

What Firebug version do you use?

I would recommend Firebug 1.5 + Firefox 3.6
A bug related to timings is fixed in this configuration.

FB 1.5b8 available here: http://getfirebug.com/releases/firebug/1.5X/

Honza

Mike Ratcliffe

unread,

Dec 21, 2009, 9:20:53 AM12/21/09

to Firebug

Brainwalk, at the moment I would stick with 1.5b6 ... b7 & b8 are more
unstable at the moment.