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Re: Proposed new test for Navigation Timing: Monolitic Clock

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Sat, 08 Dec 2012 11:47:04 -0500
Message-ID: <50C36F08.2040002@mit.edu>
To: public-web-perf@w3.org
On 11/30/12 2:24 PM, Boris Zbarsky wrote:
> On 11/30/12 1:32 PM, Philippe Le Hegaret wrote:
>> Firefox fails on it: the difference between domainLookupStart and
>> fetchStart is negative.
>
> I haven't been able to reproduce this so far, but I'll look into this.

I still haven't been able to reproduce.  Philippe, are you sure you're 
seeing a negative domainLookupStart-fetchStart?  I do see a negative 
connectStart-domainLookupEnd in some cases when reading from cache; I 
filed https://bugzilla.mozilla.org/show_bug.cgi?id=819685 on that.

One other note: Given DNS prefetchers, I'm not sure the restriction that 
domainLookupStart must be >= various other things actually makes sense....

> I don't think you can assert that domLoading >= responseEnd as this test
> does.  In fact, in the common case domLoading will be < responseEnd, I
> would think.  Did you mean to test domInteractive >= responseEnd perhaps?

This is still a problem in the test.

-Boris
Received on Saturday, 8 December 2012 16:47:33 UTC

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