Built in Rules
Long Duration Event
A top level event blocked the browser UI for an excessive amount of time.
|(INFO) Event took 100 milliseconds or longer.|
|(WARNING) Event took 2 seconds or longer.|
Frequent layout is adding up to a non-trivial amount of time.
|(WARNING) At least 3 layout sub-events totaling 70 milliseconds or greater.|
Total Bytes Downloaded
A large amount of data was downloaded to load the current page. The thresholds are reset after a page transition.
|(INFO) Cumulative download size is 500kB or greater.|
|(WARNING) Cumulative download size is 1MB or greater.|
|(CRITICAL) Cumulative download size is 2MB or greater.|
Google Web Toolkit (GWT) Detection
Warns of inappropriate cache settings for a GWT selection script. The selection script should be served with no-caching enabled so that, when the application is upgraded, stale pages are not served from client side cache.
|(CRITICAL) GWT selection script served with no-caching disabled.|
Rules from Page Speed
The following rules are derived from the Page Speed tool. Please consult the Page Speed documentation for more information about these recommendations.
These hints have to do with optimizing client side caching.
Advises you to compress content to save download time.
Advises you to serve static data from cookieless domains.