chrome/test/data/v8_benchmark_v6/revisions.html

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   3 <title>V8 Benchmark Suite Revisions</title>
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   8   <div class="title"><h1>V8 Benchmark Suite Revisions</h1></div>
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  13 <p>
  14
  15 The V8 benchmark suite is changed from time to time as we fix bugs or
  16 expand the scope of the benchmarks.  Here is a list of revisions, with
  17 a description of the changes made.  Note that benchmark results are
  18 not comparable unless both results are run with the same revision of
  19 the benchmark suite.
  20
  21 </p>
  22
  23 <div class="subtitle"><h3>Version 6 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v6/run.html">link</a>)</h3></div>
  24
  25 <p>Removed dead code from the RayTrace benchmark and fixed a couple of
  26 typos in the DeltaBlue implementation. Changed the Splay benchmark to
  27 avoid converting the same numeric key to a string over and over again
  28 and to avoid inserting and removing the same element repeatedly thus
  29 increasing pressure on the memory subsystem. Changed the RegExp
  30 benchmark to exercise the regular expression engine on different input
  31 strings.</p>
  32
  33 <p>Furthermore, the benchmark runner was changed to run the benchmarks
  34 for at least a few times to stabilize the reported numbers on slower
  35 machines.</p>
  36
  37 <div class="subtitle"><h3>Version 5 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v5/run.html">link</a>)</h3></div>
  38
  39 <p>Removed duplicate line in random seed code, and changed the name of
  40 the Object.prototype.inherits function in the DeltaBlue benchmark to
  41 inheritsFrom to avoid name clashes when running in Chromium with
  42 extensions enabled.
  43 </p>
  44
  45 <div class="subtitle"><h3>Version 4 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v4/run.html">link</a>)</h3></div>
  46
  47 <p>The <i>Splay</i> benchmark is a newcomer in version 4.  It
  48 manipulates a splay tree by adding and removing data nodes, thus
  49 exercising the memory management subsystem of the JavaScript engine.
  50 </p>
  51
  52 <p>
  53 Furthermore, all the unused parts of the Prototype library were
  54 removed from the RayTrace benchmark. This does not affect the running
  55 of the benchmark.
  56 </p>
  57
  58
  59 <div class="subtitle"><h3>Version 3 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v3/run.html">link</a>)</h3></div>
  60
  61 <p>Version 3 adds a new benchmark, <i>RegExp</i>.  The RegExp
  62 benchmark is generated by loading 50 of the most popular pages on the
  63 web and logging all regexp operations performed.  Each operation is
  64 given a weight that is calculated from an estimate of the popularity
  65 of the pages where it occurs and the number of times it is executed
  66 while loading each page.  Finally the literal letters in the data are
  67 encoded using ROT13 in a way that does not affect how the regexps
  68 match their input.
  69 </p>
  70
  71
  72 <div class="subtitle"><h3>Version 2 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v2/run.html">link</a>)</h3></div>
  73
  74 <p>For version 2 the Crypto benchmark was fixed.  Previously, the
  75 decryption stage was given plaintext as input, which resulted in an
  76 error.  Now, the decryption stage is given the output of the
  77 encryption stage as input.  The result is checked against the original
  78 plaintext.  For this to give the correct results the crypto objects
  79 are reset for each iteration of the benchmark.  In addition, the size
  80 of the plain text has been increased a little and the use of
  81 Math.random() and new Date() to build an RNG pool has been
  82 removed. </p>
  83
  84 <p>Other benchmarks were fixed to do elementary verification of the
  85 results of their calculations.  This is to avoid accidentally
  86 obtaining scores that are the result of an incorrect JavaScript engine
  87 optimization.</p>
  88
  89
  90 <div class="subtitle"><h3>Version 1 (<a href="http://v8.googlecode.com/svn/data/benchmarks/v1/run.html">link</a>)</h3></div>
  91
  92 <p>Initial release.</p>
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