I have recently moved my dedicated server to a new provider. I mostly did this for pricing reasons, but there’s also the benefit of network speed, as most of my visitors and now – the server itself – are in Europe. This move, coupled with a few optimizations, has opened my eyes towards some data – the impact of page load time on “pages per visit” metric. While the general theory behind the relationship of the two is clear to everyone, the actual numbers did shock me.
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A bit over a week ago Chris Heilmann published a post on table of contents generators, where he listed a couple of JavaScript methods to do that. It’s been always in the plans to optimize the performance of my own implementation of the HTML5 outlining routine – and what better way to measure it, than to compare it with some other approaches while I’m at it. To no surprise, I lost. Big time.
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This week I had a joy of spending several hours trying to solve and intermitently happening bug. In short, some 2 times out of 3 the YUI selector utility failed to lookup elements in an XHR loaded HTML fragment. After digging quite deep into the YUI code, I found that it was actually the fault of the way ASP.NET MVC treats partial views.
Summary
- ASP.NET MVC allows use of ASCX as “partial views”
- It correctly assumes, that uniqueness of ClientID should be preserved
- It incorrectly does not prepend an alpha-character to automatically generated GUID based IDs
- User agents and selector libraries may correctly ignore such invalid IDs
- Solution: override
ViewUserControl.UniqueID
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Pretty much two weeks ago I dropped my notes from FullFrontal 2009 onto developer’s forum at work. And one full colleague of mine enquired why did I say that “javascript:void(0) must die”. I didn’t really have a chance to follow it up until now (happy birthday, dear blog).
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