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Who maintains this site?
How does it work?
Why is Opera not available?
Why is IE not available?
AWFY runs cutting-edge not released yet versions of the browsers to track improvements and regressions as they happen. The browsers get tested multiple times a day, since that is how fast performance can change from one to another build. IE doesn't provide nightly builds. So a new build is only available every few months/years. In that regard it doesn't really make sense to run benchmarks on it every few hours. (This is nexto the fact that currently only one machine would be able to run IE versions and that IE builds are quite invasive and touch a lot of the machine OS upon install and might cause unrelated regressions on other browsers). Edge is being tested on AWFY, though.
Why is Safari not tested on 32-bit machine?
Safari defaults to 64-bit machines and doesn't need to worry about 32-bit anymore. Big pieces of their engine are 64-bit only. As a result showing Safari on 32-bit machines would give incorrect results.
What are the graphs?
The top left-hand graph is Mozilla's Kraken benchmark. The top right-hand graph is Apple's SunSpider benchmark. The bottom graph is Google's Octane benchmark suite.
What do the hover tips mean?
"Source" is where we got the engine from. "Tested" is when we downloaded the engine, compiled, and tested it. "Rev" is the unique point in the engine's revision history we tested. If the datapoint represents a range, there may be multiple revs. These numbers/strings are for developers to see which changes happened in between points in the graph.
ARM is the CPU present in many embedded devices, like smartphones and tablet devices. We're interested in this for Firefox for Android.
Is this open source?
Fo' sho', https://github.com/mozilla/arewefastyet