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Trim some fat from the traversal #17741

Merged
merged 3 commits into from Jul 15, 2017
Merged

Trim some fat from the traversal #17741

merged 3 commits into from Jul 15, 2017

Commits on Jul 15, 2017

  1. Avoid memmoving the large smallvec in Parallel.rs. 

    MozReview-Commit-ID: 7nzjMwOmszZ
    @bholley
    bholley committed Jul 15, 2017
    2a58c07

  2. Move clearing of dirty descendants bit closer to the last place it's … 

    …needed.

In the next patch, we'll move logic to identify the children for traversal into
preprocess_children (which will be renamed), and the set_dirty_descendants logic
will move along with it. So left as-is, the code here will clobber the flags.

MozReview-Commit-ID: 7ZskKWD4QC3
    @bholley
    bholley committed Jul 15, 2017
    e534ec9

  3. Pass a callback to recalc_style_at to avoid traversing children twice. 

    MozReview-Commit-ID: DIHXaVNzbFM
    @bholley
    bholley committed Jul 15, 2017
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