logging request time

[Vladimir Stavrinov]

Is subj possible? i.e. if there available variables like $request_time
in nginx or %T, or %D in apache? I do believe that std.log(key:value)
may be used to output this value into ncsa log via %{VCL_Log:key)
formatter, but question is where to get this value from?

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##  Vladimir Stavrinov
##  vstavrinov at gmail.com
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