Internet Explorer 8 RC1: almost ready to roll

Release Candidate 1 of Microsoft's IE8 offers faster performance, better searches, more security and enough stability to be truly useful.

The just-released Release Candidate 1 (RC1) of Internet Explorer 8 is a fast, stable browser, tweaked for productivity and security, with few obvious changes over the previous Beta 2 release .

RC1 is feature-complete and largely bug-free. It appears nearly ready for widespread release, so don't be surprised if the final version arrives relatively soon.

In this review, I'll look at the changes made between the Beta 2 and RC1 releases of IE8. (Note that IE8 RC1 is available for XP and Windows Vista, but not yet for Windows 7. The version of IE8 in Windows 7 is later than Beta 2, but earlier than RC1.)

Changes in compatibility

You most likely won't notice one of the most important changes made with RC1: How IE8 handles Web sites designed for IE7 that cause compatibility problems with IE8. Previous to RC1, IE8 introduced its Compatibility View, which tricks a site into believing that you're running IE7. When you run into any compatibility issues on a site, you click the small icon of a broken page at the right of the Address Bar, and you can then view the site properly, as if you were using IE7. IE8 remembers that it needs to use Compatibility View on pages for which you've used the view before, so you won't have to click the icon each time you visit.

RC1 improves Compatibility View by automating it to a certain extent. Microsoft apparently found that a fair number of popular sites coded for IE7 were causing some compatibility problems with IE8. So it created a list of those sites and automatically feeds that list to IE8. Now, whenever you browse to any site on the list, IE8 automatically shifts to Compatibility View, without requiring you to take any action.

You can opt out of the list if you want. Choose Tools-->Compatibility View Settings, and uncheck the box next to the choice that reads Include updated Web site lists from Microsoft . To opt back in, simply check the box. The screen also lets you add sites to your own personal list as well. In addition, Microsoft says it will update the list every several months.

In practice, I found that this new feature worked well. In the beta, I had experienced a slight compatibility problem with my personal iGoogle page --- the Google Calendar applet didn't display properly on the page, although the calendar itself worked fine when I clicked through to it. When I visited my iGoogle page in IE8 RC1, the calendar displayed without a problem. In looking at the Address Bar, I noticed that the Compatibility View button wasn't being displayed, which means that I was viewing it in Compatibility View. I hadn't added iGoogle to a list, so it clearly was one that Microsoft included in its list of sites.

Increased performance

Microsoft claims that it has tweaked RC1 for performance and that IE8 now displays pages more quickly than in Beta 2. According to Microsoft, it has also optimized page-load times for the most popular sites on the Internet. The company says that it studied where IE8 spent its time loading the most popular 25 sites online, and it found that JavaScript accounted for less than 20% of the page load time. Because of that, it tweaked IE8 performance for those top 25 pages, rather than specifically for JavaScript loading.

I was unable to authoritatively confirm either assertion, although my pages did load quite swiftly.

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Preston Gralla

Computerworld (US)
Topics: Microsoft, Internet Explorer
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