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authorGunnar Sletta <gunnar.sletta@nokia.com>2010-11-19 15:24:08 +0100
committerGunnar Sletta <gunnar.sletta@nokia.com>2010-11-19 15:24:08 +0100
commite50e811461b54e07184af547f62aa44b3c5bb681 (patch)
tree45541bc05471d6c49305afeafa13f69031ccdecd /tests/benchmarks/script/v8/tests/README.txt
parent05b65c2f9df1c2c56c72f313401a6adb422d381b (diff)
parentb115770cc3bba68740a6848c7ccaed932399aca9 (diff)
Merge branch 'master' of scm.dev.nokia.troll.no:qt/qt
Conflicts: src/gui/text/qfontengine_mac.mm src/gui/text/qfontengine_p.h
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+V8 Benchmark Suite
+==================
+
+This is the V8 benchmark suite: A collection of pure JavaScript
+benchmarks that we have used to tune V8. The licenses for the
+individual benchmarks are included in the JavaScript files.
+
+In addition to the benchmarks, the suite consists of the benchmark
+framework (base.js), which must be loaded before any of the individual
+benchmark files, and two benchmark runners: An HTML version (run.html)
+and a standalone JavaScript version (run.js).
+
+
+Changes From Version 1 To Version 2
+===================================
+
+For version 2 the crypto benchmark was fixed. Previously, the
+decryption stage was given plaintext as input, which resulted in an
+error. Now, the decryption stage is given the output of the
+encryption stage as input. The result is checked against the original
+plaintext. For this to give the correct results the crypto objects
+are reset for each iteration of the benchmark. In addition, the size
+of the plain text has been increased a little and the use of
+Math.random() and new Date() to build an RNG pool has been removed.
+
+Other benchmarks were fixed to do elementary verification of the
+results of their calculations. This is to avoid accidentally
+obtaining scores that are the result of an incorrect JavaScript engine
+optimization.
+
+
+Changes From Version 2 To Version 3
+===================================
+
+Version 3 adds a new benchmark, RegExp. The RegExp benchmark is
+generated by loading 50 of the most popular pages on the web and
+logging all regexp operations performed. Each operation is given a
+weight that is calculated from an estimate of the popularity of the
+pages where it occurs and the number of times it is executed while
+loading each page. Finally the literal letters in the data are
+encoded using ROT13 in a way that does not affect how the regexps
+match their input.
+
+
+Changes from Version 3 to Version 4
+===================================
+
+The Splay benchmark is a newcomer in version 4. It manipulates a
+splay tree by adding and removing data nodes, thus exercising the
+memory management subsystem of the JavaScript engine.
+
+Furthermore, all the unused parts of the Prototype library were
+removed from the RayTrace benchmark. This does not affect the running
+of the benchmark.
+
+
+Changes from Version 4 to Version 5
+===================================
+
+Removed duplicate line in random seed code, and changed the name of
+the Object.prototype.inherits function in the DeltaBlue benchmark to
+inheritsFrom to avoid name clashes when running in Chromium with
+extensions enabled.
+
+
+Changes from Version 5 to Version 6
+===================================
+
+Removed dead code from the RayTrace benchmark and fixed a couple of
+typos in the DeltaBlue implementation. Changed the Splay benchmark to
+avoid converting the same numeric key to a string over and over again
+and to avoid inserting and removing the same element repeatedly thus
+increasing pressure on the memory subsystem. Changed the RegExp
+benchmark to exercise the regular expression engine on different
+input strings.
+
+Furthermore, the benchmark runner was changed to run the benchmarks
+for at least a few times to stabilize the reported numbers on slower
+machines.