GXT 2.0-M2 upgrade experience

Recently I shared my GWT 1.6 and GXT 2.0-M1 upgrade experience which was quite underwhelming on the GXT front. In the past week my team went ahead an upgraded to GXT 2.0-M2 to take advantage of some specific changes we’d noticed in svn.

For the most part 2.0-M2 didn’t introduce new breaking changes beyond M1. In our project, the only obvious differences were new parameters to some renderers that were easily converted. Functionally, most things seem to work like M1 as well – just a few minor tweaks here and there. However, on the performance front there seem to be some incremental improvements: one example is TreeTable, where we’ve had problems with render time growing linearly with the number of children (over 100ms/item in IE7 – that’s over a minute for a 100 item tree!). It’s still based on the legacy Table paradigm rather than their newer Grid (see some GXT notes on the difference here), but has improved to the point where we can use it for a moderately sized TreeTable and re-build/render a new TreeTable in under 10 seconds. The existence of Table vs. Grid is a good example of 2.0-M2 still exposing several different architectural approaches to components, but at least the ones being actively pursued seem to be headed in the right direction.

Other than that M2 has been a worthy upgrade from M1. I’d fully expect anyone upgrading from 1.2.x to 2.0-M2 to still experience a lot of pain, but if you’re already on M1 then it makes sense to go ahead and get all these fixes. Our M1 build was actually an svn checkout that already had a couple weeks’ worth included, and M2 is certainly a much higher quality preview than either that or the original M1 release. Moving from M1 to M2 will give you a bunch of fixes and keep you in sync with the API for a very minimal amount of effort.


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