[Webkit-unassigned] [Bug 153002] New: Form submit event has a long delay before triggering when many controls on the page

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=153002

            Bug ID: 153002
           Summary: Form submit event has a long delay before triggering
                    when many controls on the page
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: Mac OS X 10.11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jgaskins+webkit at gmail.com

A form's submit handler takes a long time to trigger when there are a lot of inputs on the page, even when they are not contained within that form.

Here is an example: http://jsbin.com/hasulikiqe/2/edit?html,js,console,output

It's a dummy todo-list app. With the JavaScript console open, you can see that it a second or so to trigger the submit handler (which just prints a message to the console) after entering text into the input field and pressing enter, even though none of the checkboxes are part of that form.

When we remove the checkboxes, the delay is gone: http://jsbin.com/rogipubexe/2/edit?html,js,console,output

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