These are regressions tests. It is very difficult to test the performance improvements short of breaking out your favourite profiling tool. On the forms I was testing on (Edit course settings, frontpage settings, add new forum), the improvement was in the region of 10ms. These test instructions are more-or-less the same as when the checker was introduced. Open the Moodle Login Page Make a change to to the username Hit Refresh The page refreshes Log in to Moodle and navigate to a course Choose Edit Settings Without any changes Refresh the page (the page refreshes) Hit the back button (you go back in time and space) Go back to the Edit Settings Page Try closing the browser window (it closes) Click Save and Display (the form saves) Now make some changes to various fields Go back to the Edit Settings Page Make a change to the 'Course full name' Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Click Save and Display (the form saves) Repeat the above steps using a select instead of 'Course full name' Repeat the above steps using a textarea (not TinyMCE) instead of 'Course full name' Go back to the course and create an Assignment Choose Edit Settings Without any changes Refresh the page to confirm that it refreshes when there have been no changes Make some changes to the TinyMCE editor Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Click Save and Display (the form saves) Uploading files As a Student, choose the 'Upload Files' option Refresh the page to confirm that it refreshes when there have been no changes Upload a file using the 'Add' button and the filepicker Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Refresh the page and this time leave to start afresh Upload a file using the drag/drop functionality (Supported browsers only - Chrome and Firefox) Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Click 'Save Changes' Modify existing files Choose the 'Edit these files' button Refresh the page and this time leave to start afresh From the drop-down on a file, choose the rename option and enter a new name Upload a file using the drag/drop functionality (Supported browsers only - Chrome and Firefox) Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Refresh the page and this time leave to start afresh From the drop-down menu on a file, choose the Delete option and confirm Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Refresh the page and this time leave to start afresh Create a new directory From the drop-down menu on a file, choose the Delete option and confirm Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Refresh the page and this time leave to start afresh Add an additional files using either option From the drop-down menu on a file, choose the Delete option and confirm Refresh the page (you get a popup) - click to stay Hit the back button (you get a popup) - click to stay Try closing the browser window/tab (you get a popup) - click to stay Admin Pages These changes are also included in admin/settings.php pages. The same code is used throughout so it's not really necessary to test all functionality again, but you may check if you wish.