Any perceived latency between input and action.

Examples:
- I try to switch tabs but the browser user interface freezes up and
the title bar says "not responding"
- I type a URL and press enter but it doesn't load for a minute
because the process associated with that tab is cold

-Ben

On Thu, May 14, 2009 at 4:51 PM, Greg Spencer <[email protected]> wrote:
> Got it.  Thanks.
> -Greg.
>
> On Thu, May 14, 2009 at 4:49 PM, Evan Martin <[email protected]> wrote:
>>
>>
>> http://src.chromium.org/viewvc/chrome/trunk/src/chrome/browser/jankometer.h?view=markup
>>
>> On Thu, May 14, 2009 at 4:44 PM, Greg Spencer <[email protected]> wrote:
>> > So, what is your nuanced definition of "Jank"?  All it means to me is
>> > "bad".
>> >  Aren't all bugs bad?
>> > -Greg.
>> >
>> > On Thu, May 14, 2009 at 2:44 PM, Linus Upson <[email protected]> wrote:
>> >>
>> >> I think this is important. I've been noticing the jank level rising as
>> >> well.
>> >> Linus
>> >>
>> >> On Wed, May 13, 2009 at 5:18 PM, Ben Goodger (Google)
>> >> <[email protected]>
>> >> wrote:
>> >>>
>> >>> Though I've upgraded my desktop PC to fancy hardware, I still use a
>> >>> Core 2 Duo 2.4GHz laptop with 2GB RAM. This is still a pretty typical
>> >>> configuration for even high end laptops today. Sad to say under heavy
>> >>> load (several windows, many tabs in each), the amount of jank I'm
>> >>> experiencing is pretty high.
>> >>>
>> >>> To help identify and triage these issues, I've added a "Jank" label in
>> >>> the bug system. I feel like we should focus on reducing these issues
>> >>> in the next release cycle - this is an area where we have historically
>> >>> had a good performance, we should not lose it.
>> >>>
>> >>> It's hard to write tests for jankiness because time and entropy are
>> >>> typically the key inputs more than any specific set of pages. But if
>> >>> you experience jank in your own use of Chrome I encourage you to try
>> >>> and identify causes and file bugs with this new label.
>> >>>
>> >>> http://code.google.com/p/chromium/issues/list?can=2&q=label%3AJank
>> >>>
>> >>> -Ben
>> >>>
>> >>>
>> >>
>> >>
>> >>
>> >
>> >
>> > >> >
>> >
>
>

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