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In addition to new validation checks, the revised benchmark eliminates delays in the original version that were added to allow the browser to complete each portion of the tests before moving to the next. However, these delays started distorting the results because on fast hardware, the test suite's built in delays were allowing hardware power management features to kick in, sporadically creating the false appearance of poor performance.
Competing for the future of HTML5
While Apple and Google have worked together closely for over half a decade to improve WebKit, particularly with the goal of making HTML5 rich apps possible across both desktop browsers and on mobile devices, the two companies are now separating their efforts after Google decided to fork the project and take its own Chromium code solo (under a project now named "Blink").
Somewhat ironically, Google's fragmentation of Apple's WebKit platform (as the platform's largest independent user) is similar to what many expect Samsung to do to Google's Android project, ultimately leaving Google to maintain its platform while Samsung runs with its own copy, following the footsteps of Amazon and a variety of Chinese forks.
At the end of 2011, Apple's Oliver Hunt warned that "adding direct and exposed support for a non-standard language [like Dart] is hostile to the open-web by skipping any form 'consensus' driven language development that might happen, and foisting whatever language we want on the web instead. This implicitly puts any browser that supports additional proprietary extensions in the same position as a browser supporting something like [Microsoft's proprietary] vbscript, and has the same effect: breaking the open web by making content that only works effectively in a single product."
Alongside its flirtation with Dash in 2011, Google also advocated Adobe Flash (hardwiring it into its Chrome browser) and worked to derail the H.264 video standard in favor of its own WebM video codec, two other efforts that were clobbered by the reality of mobile devices dominated by iOS. Google has since stated that it does not plan to push adoption of Dart within its own "Blink" Chromium fork.
Apple is expected to introduce new versions of Safari incorporating the latest advances in WebKit for iOS 7 and OS X 10.9 at next month's Worldwide Developer Conference.