On Tue, 08 Feb 2011 16:06:52 -0000, John Tamplin <[email protected]> wrote:
I am not on the GMail team, but we did see similar issues on the GWT
team --
simply parsing the downloaded script takes a lot of time and interferes
with user interaction with the UI, so as awkward as it seems,
downloading the
script in a comment in the background, and then evaluating it when needed
does provide a better user experience on mobile devices.
See
http://googlecode.blogspot.com/2009/09/gmail-for-mobile-html5-series-reducing.html
for the official blog post about this technique.
So, I think you should consider having download / parse / execute be
separate if you are going to go to the trouble to do anything.
Isn't this just a quality of implementation issue? Parsing doesn't have to
block UI events — only execution needs to, but execution of script that
does nothing but declare functions can be very fast.
Also speed of devices and quality of JS implementations improves, so this
problem may eventually disappear.
--
regards, Kornel
