Re: Measuring DOM performance

Boris Zbarsky wrote:
> On 10/23/09 8:50 PM, Jonas Sicking wrote:
>> My main concern on the subject of "measureing DOM performance" is having
>> tests that measure *only* the DOM. Many times you end up testing the
>> performance of for example the layout engine as well. Any time you do
>> modifications in a document that is rendered layout code has to kick in.
> 
> I think we want tests like this too; possibly in addition to those we 
> want pure-DOM tests...
> 
> It should be possible to minimize the layout part by working in 
> disconnected subtrees or data documents, right?

True.

I guess the answer is simply that we should be testing what people are 
doing. And note that modifying things in-displayed-document can be very 
different performance-wise than out-of-displayed-document. So if people 
do both, we should test both.

/ Jonas