what does the light blue colour mean in the timeline tab?

[Jakob Fix]

Hello,

please see this screenshot of the timeline tab:

http://img46.imageshack.us/img46/9208/chrometimeline.png

as you can see, there is a very long period of "light blue", and I couldn't find any explanation as to what that means. as you can imagine, I'm trying to reduce the duration to something more acceptable.

I also have the timeline json file if that's of any help.

thank you,

Jakob.

[Vsevolod Vlasov]

Light blue shows aggregated time taken by this action. 

In your case it's time between sending request and receiving response from the server.

Note it's not an actual download time (data is received between receiving response and finishing loading).

Could that be an extremely slow DNS server or some user action in the middle of request (e.g. proxy authentication)?

--
Thank you,

Vsevolod Vlasov (vse...@google.com)

[Jakob Fix]

Hi Vsevolod,

I have checked and made sure that the proxy is disabled for local addresses (and particularly localhost alias 127.0.0.1). I'm also requesting the resource from 127.0.0.1 to make sure that no DNS lookups are made.  So it doesn't seem to be network-related.

Would JavaScript execution or XSLT transformation contribute to the light-blue bar? As a matter of fact, what is transferred from the server is a page containing a complex XForm that gets then XSLT-transformed in the browser using <?xml-stylesheet href="/resource/xsltforms/xsltforms.xsl" type="text/xsl"?>

Using view-source the page's source code is displayed quite quickly, but when rendering the form on-screen, it takes this very long time.

This would point to a performance problem of the XSLT stylesheet used. Does this make sense?

cheers,
Jakob.