Re: nsGenericElement::InsertBefore performance

Michiel van Leeuwen wrote:
> - switch to month view (menu: view -> month view, or the toolbarbutton)
> - add an event (file -> new event, or double click on any day box)
> - Save the event (button save and close)

Aha.  Thank you.

Brief summary:

Of the time under insertBefore there, about half is spent on the XBL binding 
script attachment (75% executing the constructor, the rest installing the 
implementation; the latter is largely JS-wrapping the node).  It's probably 
installing multiple bindings, because I bet some of those anonymous nodes have 
bindings of their own.

The other half is spent under ConstructFrame.  20% is spent resolving style, 50% 
is spent loading the XBL bindings, generating their anonymous content, etc.

I should note that searching for "calendar-month-day-box-item" shows me a number 
of CSS rules that might not be all that fast, depending on how many 
class="calendar-event-selection" nodes there are, etc.

So my overall conclusion is as the guess was: there are just too many nodes and 
too much JS in flight here, per item.

-Boris