Issue 2497: REGRESSION: Performance Drop in Sunspider since 2255
http://code.google.com/p/chromium/issues/detail?id=2497

New issue report by wellofsouls0:
Product Version      : from 2255 to 2356 (latest) <see about:version>
URLs (if applicable) : http://www2.webkit.org/perf/sunspider-
0.9/sunspider.html
Other browsers tested:
   Add OK or FAIL after other browsers where you have tested this issue:
      Safari 3: N/A
     Firefox 3: N/A
          IE 7: N/A

What steps will reproduce the problem?
1. go to Sunspider Javascript Benchmark in the above URL
2. Run the benchmark
3. Wait to see result

What is the expected result?
performance should be the same or faster than build 2250

What happens instead?
performance drops a lot compared to build 2250

Please provide any additional information below. Attach a screenshot if
possible.

build 2250 result :
http://www2.webkit.org/perf/sunspider-0.9/sunspider-results.html?%7B%223d-
cube%22:%5B38,41,43,46,41%5D,%223d-morph%22:%5B73,79,78,73,77%5D,%223d-
raytrace%22:%5B49,48,48,50,47%5D,%22access-binary-
trees%22:%5B8,9,7,9,8%5D,%22access-
fannkuch%22:%5B46,43,42,41,41%5D,%22access-
nbody%22:%5B44,40,40,48,39%5D,%22access-
nsieve%22:%5B27,29,27,26,26%5D,%22bitops-3bit-bits-in-
byte%22:%5B8,7,8,8,9%5D,%22bitops-bits-in-
byte%22:%5B16,16,15,14,16%5D,%22bitops-bitwise-
and%22:%5B28,27,28,29,27%5D,%22bitops-nsieve-
bits%22:%5B46,39,41,51,40%5D,%22controlflow-
recursive%22:%5B5,7,5,4,7%5D,%22crypto-
aes%22:%5B34,32,28,26,33%5D,%22crypto-
md5%22:%5B27,25,23,24,26%5D,%22crypto-sha1%22:%5B25,23,25,24,24%5D,%22date-
format-tofte%22:%5B106,106,107,108,107%5D,%22date-format-
xparb%22:%5B113,111,104,111,111%5D,%22math-
cordic%22:%5B85,88,96,83,85%5D,%22math-partial-
sums%22:%5B50,53,50,51,59%5D,%22math-spectral-
norm%22:%5B20,18,19,19,21%5D,%22regexp-
dna%22:%5B410,409,411,423,403%5D,%22string-
base64%22:%5B81,73,83,91,70%5D,%22string-
fasta%22:%5B74,75,73,73,73%5D,%22string-
tagcloud%22:%5B179,171,204,173,169%5D,%22string-unpack-
code%22:%5B214,224,225,221,229%5D,%22string-validate-
input%22:%5B96,93,95,95,96%5D%7D

build 2255 result :
http://www2.webkit.org/perf/sunspider-0.9/sunspider-results.html?%7B%223d-
cube%22:%5B64,69,52,73,70%5D,%223d-
morph%22:%5B122,112,124,117,126%5D,%223d-
raytrace%22:%5B72,75,84,72,82%5D,%22access-binary-
trees%22:%5B9,8,7,9,8%5D,%22access-
fannkuch%22:%5B64,64,54,65,66%5D,%22access-
nbody%22:%5B71,52,64,48,77%5D,%22access-
nsieve%22:%5B40,38,39,39,41%5D,%22bitops-3bit-bits-in-
byte%22:%5B8,7,7,7,8%5D,%22bitops-bits-in-
byte%22:%5B27,16,13,26,31%5D,%22bitops-bitwise-
and%22:%5B38,39,38,41,50%5D,%22bitops-nsieve-
bits%22:%5B70,62,40,47,51%5D,%22controlflow-
recursive%22:%5B6,16,5,5,6%5D,%22crypto-
aes%22:%5B54,39,39,40,37%5D,%22crypto-
md5%22:%5B35,49,36,38,35%5D,%22crypto-sha1%22:%5B46,49,23,35,35%5D,%22date-
format-tofte%22:%5B162,178,186,166,154%5D,%22date-format-
xparb%22:%5B173,179,176,179,158%5D,%22math-
cordic%22:%5B135,131,150,147,147%5D,%22math-partial-
sums%22:%5B72,86,76,74,70%5D,%22math-spectral-
norm%22:%5B33,32,34,32,33%5D,%22regexp-
dna%22:%5B641,659,631,645,640%5D,%22string-
base64%22:%5B138,115,139,141,115%5D,%22string-
fasta%22:%5B105,94,105,104,118%5D,%22string-
tagcloud%22:%5B292,275,340,261,281%5D,%22string-unpack-
code%22:%5B361,362,342,346,359%5D,%22string-validate-
input%22:%5B153,152,153,137,138%5D%7D

build 2356 result :
http://www2.webkit.org/perf/sunspider-0.9/sunspider-results.html?%7B%223d-
cube%22:%5B62,63,69,63,79%5D,%223d-
morph%22:%5B120,125,121,130,109%5D,%223d-
raytrace%22:%5B85,90,86,71,73%5D,%22access-binary-
trees%22:%5B8,7,8,22,7%5D,%22access-
fannkuch%22:%5B53,63,65,40,56%5D,%22access-
nbody%22:%5B68,57,86,65,64%5D,%22access-
nsieve%22:%5B53,38,28,39,39%5D,%22bitops-3bit-bits-in-
byte%22:%5B19,7,7,17,8%5D,%22bitops-bits-in-
byte%22:%5B27,24,26,15,15%5D,%22bitops-bitwise-
and%22:%5B39,35,46,26,39%5D,%22bitops-nsieve-
bits%22:%5B74,62,76,37,65%5D,%22controlflow-
recursive%22:%5B5,16,16,16,5%5D,%22crypto-
aes%22:%5B43,52,48,50,49%5D,%22crypto-
md5%22:%5B37,23,36,50,36%5D,%22crypto-sha1%22:%5B47,37,35,36,49%5D,%22date-
format-tofte%22:%5B178,168,176,165,164%5D,%22date-format-
xparb%22:%5B155,151,141,166,163%5D,%22math-
cordic%22:%5B150,146,138,136,157%5D,%22math-partial-
sums%22:%5B74,76,73,74,75%5D,%22math-spectral-
norm%22:%5B32,19,33,32,33%5D,%22regexp-
dna%22:%5B630,629,621,614,622%5D,%22string-
base64%22:%5B85,99,112,101,98%5D,%22string-
fasta%22:%5B105,106,105,93,105%5D,%22string-
tagcloud%22:%5B254,327,267,272,268%5D,%22string-unpack-
code%22:%5B348,329,342,355,338%5D,%22string-validate-
input%22:%5B122,131,136,119,135%5D%7D


Issue attributes:
        Status: Unconfirmed
        Owner: [EMAIL PROTECTED]
        Labels: Type-Bug Pri-2 OS-All Area-Unknown

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