Performance testing

[Alfonso Martínez de Lizarrondo]

I guess that everybody has this in mind, but no one has written it so far.

In the future it would be very nice to have an automated performance testing system, so that we can keep track of any unexpected degradation of the performance. And also to avoid that little + little + little changed do end up summing a serious problem.

For a reference, this post about Chrome explains the same basic idea: ​http://blog.chromium.org/2008/11/putting-it-to-test.html and points that some of the tools are based on HTML and JS, so maybe we can reuse something from there.

[Garry Yao]

The patch is proposing of using ​JSLitmus as the benchmarking framework, the core idea is allow easy integration between existing YUI unit test case and performance test case by the following way:

1. Any self hosting test(those doesn't require a 'setup' and have same result regard multiple times of running) could be used as performance test case without extra effort;
2. The performance tests could be optionally chosen to run together with the unit test or run separately later.

[Garry Yao]

Single Test Case Runner Snapshot

[Garry Yao]

The all-in-one test runner is not functional yet, so running test-all.html will result in unexpected result.