Re: [tcpm] alternate IW proposal

...
>
>  Really? You can tell the difference between 1 second and 0.8
>>> seconds? or 1.2 seconds?
>>>
>>
>> Yep.  That's what they tell me.  I haven't run the tests, but yeah
>> that's the right order for human perception to start.
>>
>
> People can notice things down to about 200ms. That does NOT mean they know
> 1 vs 1.2 seconds, though - and definitely not 400 vs 500ms. We looked at
> this issue in the mid 90s when looking at web push systems.

Fortunately, we don't have to speculate on the impact of delay on user
behaviors. There are more recent (2009, 2010) studies that show that even
small latency increases, such as 100ms, have measurable impacts (obviously
negative) on user experience and perception.

These studies describe experiments and go on to quantify the impact of
delays ranging from 50-2000ms on user behavior, number of clicks, and such
other metrics.
* http://velocityconf.com/velocity2009/public/schedule/detail/8523
* http://googleresearch.blogspot.com/2009/06/speed-matters.html

Other work along similar lines:
http://velocityconf.com/velocity2010/public/schedule/detail/13031
http://velocityconf.com/velocity2009/public/schedule/detail/7709
http://www.gomez.com/pdfs/wp_why_web_performance_matters.pdf

I think we can safely put to rest the question on whether IW10 benefits are
significant enough to warrant it to be standardized.

-Nandita

>
>
> Joe
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