Opera 10 alpha on SunSpider for comparison.

My opinion:

I've been using Chrome since it has the nicest interface with Vista Aero. It's really become stable compared to it's initial release, and it even updates nicely in the background.  It doesn't nag with multiple allow prompts like Firefox 3 to allow SSL exceptions. I use it's application mode for Gmail and Google Docs. It loads faster than a real application, and is accessible anywhere you have internet access. The new tab feature is the best, and no firefox plugins offer the same level of integration with user history and a search pane. I now bookmark everything of interest and just really on Chrome's ability to quickly find what I'm looking for based on a keyword.

I still use firefox  though because of noscript which protects you from javascript and xss attacks. And it's almost as fast as Chrome's v8 engine. Plus you can somewhat replicate Chrome's look with the Chromifox2 theme. The Chrome theme really makes the tabs stand out.

Opera is the slowest in terms of javascript. But it's rendering is excellent, and fast on most sites. It did get stuck on gmail for me (it never finished loading).

Once Chrome has a "only load javascript from first party domain.com" then I'll switch permanently. But Chrome otherwise is fast, and loads instantly. I don't have to worry about sites crashing and taking out the whole browser.

RESULTS (means and 95% confidence intervals)
--------------------------------------------
Total:                 2815.8ms +/- 5.9%
--------------------------------------------

  3d:                   311.0ms +/- 7.9%
    cube:               104.4ms +/- 6.1%
    morph:               98.0ms +/- 11.2%
    raytrace:           108.6ms +/- 10.8%

  access:               518.4ms +/- 7.9%
    binary-trees:        37.8ms +/- 6.7%
    fannkuch:           264.0ms +/- 9.7%
    nbody:              144.0ms +/- 5.6%
    nsieve:              72.6ms +/- 14.6%

  bitops:               406.4ms +/- 10.8%
    3bit-bits-in-byte:   50.0ms +/- 16.2%
    bits-in-byte:        89.4ms +/- 12.2%
    bitwise-and:        174.2ms +/- 8.2%
    nsieve-bits:         92.8ms +/- 18.1%

  controlflow:           44.4ms +/- 15.2%
    recursive:           44.4ms +/- 15.2%

  crypto:               204.0ms +/- 9.4%
    aes:                 98.4ms +/- 5.8%
    md5:                 53.0ms +/- 16.8%
    sha1:                52.6ms +/- 17.5%

  date:                 204.6ms +/- 15.6%
    format-tofte:       119.2ms +/- 15.5%
    format-xparb:        85.4ms +/- 16.6%

  math:                 295.6ms +/- 5.5%
    cordic:             132.6ms +/- 9.7%
    partial-sums:       100.0ms +/- 6.9%
    spectral-norm:       63.0ms +/- 15.6%

  regexp:                85.6ms +/- 14.3%
    dna:                 85.6ms +/- 14.3%

  string:               745.8ms +/- 7.4%
    base64:              80.4ms +/- 8.2%
    fasta:              168.2ms +/- 6.7%
    tagcloud:           121.6ms +/- 10.7%
    unpack-code:        297.0ms +/- 14.7%
    validate-input:      78.6ms +/- 7.8%

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