This blog is closed as of 2/2015. @EricLaw left Microsoft in 2012, but was named an IE MVP in '13 & an IE userAgent (http://useragents.ie) in '14.
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Best Practice: Get your HEAD in order
To ensure optimal performance and reliability when rendering pages, you should order the elements within the HEAD element carefully. First, I’ll explain the optimal order, and then explain the reasoning for this structure. Optimal Head Ordering <doctype> <html> <head>...
18 Jul 2011
IE8 Lookahead Downloader Fixed
Background Last year, I wrote about two bugs in IE8’s Lookahead Downloader that would cause IE8 to make spurious download requests for non-existent URLs. These spurious download requests generally went unnoticed by users, because the main parser would eventually retrieve the correct resource when it...
31 Mar 2010
Using Meddler to Simulate Web Traffic
As mentioned back in July , IE8’s new lookahead downloader has a number of bugs which cause it to issue incorrect speculative download requests. The “BASE Bug” caused the speculative downloader to only respect the <BASE> element for the first speculatively downloaded script...
13 Oct 2009
Bugs in IE8's Lookahead Downloader
All bugs mentioned in this post are now fixed . Internet Explorer has a number of features designed to render pages more quickly. One of these features is called the "Lookahead Downloader" and it's used to quickly scan the page as it comes in, looking for the URLs of resources which will be needed...
27 Jul 2009
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