Result table (SunSpider 0.9.1)

<td>
  iOS 4 (3GS)
</td>

<td>
  iOS 4.3 beta 2 (3GS)
</td>

<td>
  % change
</td>

<td>
  13787ms
</td>

<td class="positive">
  5357ms
</td>

<td class="positive">
  -61.1%
</td>

<td>
  1917ms
</td>

<td class="positive">
  737ms
</td>

<td class="positive">
  -61.6%
</td>

<td>
  1893ms
</td>

<td class="positive">
  617ms
</td>

<td class="positive">
  -67.4%
</td>

<td>
  1239ms
</td>

<td class="positive">
  289ms
</td>

<td class="positive">
  -76.7%
</td>

<td>
  221ms
</td>

<td class="positive">
  35ms
</td>

<td class="positive">
  -84.2%
</td>

<td>
  850ms
</td>

<td class="positive">
  308ms
</td>

<td class="positive">
  -63.8%
</td>

<td>
  1065ms
</td>

<td class="positive">
  706ms
</td>

<td class="positive">
  -33.7%
</td>

<td>
  1511ms
</td>

<td class="positive">
  606ms
</td>

<td class="positive">
  -59.9%
</td>

<td>
  1916ms
</td>

<td class="positive">
  153ms
</td>

<td class="positive">
  -92.0%
</td>

<td>
  3175ms
</td>

<td class="positive">
  1907ms
</td>

<td class="positive">
  -39.9%
</td>
Test
Total
3D
Access
Bitops
Controlflow
Crypto
Date
Math
Regexp
String

Raw results (iOS 4.3 beta 2 running on my iPhone 3GS)

============================================
RESULTS (means and 95% confidence intervals)
--------------------------------------------
Total:                  5357.3ms +/- 2.3%
--------------------------------------------

  3d:                    736.9ms +/- 7.5%
    cube:                260.1ms +/- 3.5%
    morph:               206.0ms +/- 23.2%
    raytrace:            270.8ms +/- 4.4%

  access:                617.4ms +/- 4.1%
    binary-trees:        118.8ms +/- 4.7%
    fannkuch:            180.4ms +/- 0.7%
    nbody:               222.0ms +/- 11.7%
    nsieve:               96.2ms +/- 0.8%

  bitops:                288.7ms +/- 9.6%
    3bit-bits-in-byte:    38.0ms +/- 4.3%
    bits-in-byte:         70.5ms +/- 39.0%
    bitwise-and:          85.1ms +/- 1.9%
    nsieve-bits:          95.1ms +/- 2.1%

  controlflow:            34.7ms +/- 3.2%
    recursive:            34.7ms +/- 3.2%

  crypto:                308.3ms +/- 1.1%
    aes:                 175.2ms +/- 0.5%
    md5:                  79.3ms +/- 3.9%
    sha1:                 53.8ms +/- 0.8%

  date:                  706.2ms +/- 5.5%
    format-tofte:        341.3ms +/- 11.0%
    format-xparb:        364.9ms +/- 1.1%

  math:                  605.9ms +/- 1.1%
    cordic:              224.5ms +/- 1.0%
    partial-sums:        263.4ms +/- 2.3%
    spectral-norm:       118.0ms +/- 1.2%

  regexp:                152.5ms +/- 5.5%
    dna:                 152.5ms +/- 5.5%

  string:               1906.7ms +/- 0.7%
    base64:              247.9ms +/- 2.4%
    fasta:               268.5ms +/- 0.6%
    tagcloud:            370.4ms +/- 3.0%
    unpack-code:         676.2ms +/- 0.3%
    validate-input:      343.7ms +/- 1.4%

Raw results for iOS 4.0

BlackBerry Torch SunSpider results (JavaScript benchmark)
iPhone 4 SunSpider test results (22% faster than iPhone 3GS)
JavaScript SunSpider test: iOS 3.1.3 versus iOS 4 GM
JavaScript SunSpider: HTC Evo versus HTC Incredible versus Nexus One