Hi,
I'm struggling with the performance of my web app partly due to the
unpredictability of when the browser decides to draw after (or while) I update
the page description.
Firefox seems to draw on function boundaries and eg when I access
document.body.clientHeight, so if I do something like:
myDiv.innerHTML = "abc"
h = document.body.clientHeight
myDiv.className = getClassName()
The performance is worse than if I do:
h = document.body.clientHeight
myDiv.className = getClassName()
myDiv.innerHTML = "abc"
because the former draws twice and the latter only once (obviously this example
is grossly simplified)
It doesn't seem very practical or sensible to require the developer to order
code in a specific way to avoid these sorts of performance penalties and my
prefered solution would be to add "I'm about to edit the page description,
please suspend drawing
ops" and "I've finished editing the page description, now you
may draw" functionality to the language - which is why I've mailed this group.
Alistair
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