On 5/2/16 2:30 PM, Aryeh Gregor wrote:
What's the problem with standardizing completely if we pick the limit
to be low enough that we have plenty of room?
Please define "Plenty of room"?
For a 900KB stack (what we have on Windows, per
<http://mxr.mozilla.org/mozilla-central/source/js/xpconnect/src/XPCJSRuntime.cpp#3440>)
512 DOM nodes deep corresponds to ~2KB per DOM node. 200 deep
corresponds to 5KB.
Now quick, tell me how much stack space MSVC with PGO is using for the
combination of ElementRestyler::Restyle and
ElementRestyler::RestyleChildren and
ElementRestyler::RestyleContentChildren (which is the unit of recursive
work when recalculating styles down the tree). How much stack space
will it use with the next MSVC release? How much stack space will it
use if we change the ElementRestyler struct some (note that this goes on
the stack before the Restyle() call on it)?
The answer at least for me is that I don't know. But I bet it's quite
specific to particular code paths and compilers....
-Boris
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