[webkit-dev] Could someone explain a bit on document fragments?

[Matt 'Murph' Finnicum]

I see, for a large page, that a document is created and then a number
of fragments. Are these fragments all then merged into that document?
Or are they merged into one another, forming a new document somehow?
Where is that done?

What would be a acceptable way to measure the total time spent
parsing? Going from parser creation to parser finish doesn't work when
there are many document fragments, each with it's own parser. Should I
add up the time spent in all of the parsers?

Thanks,
--Murph