1834145 - Consider making stylo work unit size configurable at runtime.

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, defect)

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Attachment: Bug 1834145 - Make style parallel traversal more tunable at runtime. r=#style,#layout

This adds two prefs to configure the parallel traversal work item size
and kick-off threshold, but otherwise shouldn't change behavior.

I switched from iterator generics to just a slice while at it, mostly
for simplicity, but there is a trade-off:

• When switching from sequential to parallel traversal, we potentially
  pay the price of memmoving the VecDeque around once to make them a
  contiguous slice.

• However we win in the common case of the smaller-than-work-unit size
  in which case we no longer need to copy stuff to a WorkItem. So I
  think overall this should be an improvement.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d9151a538eae
Make style parallel traversal more tunable at runtime. r=smaug

Comment 3

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/d9151a538eae