1536778 - Avoid creating nsDisplayListCollection in nsBlockFrame::BuildDisplayList() and optimize DisplayLine enter condition

Status: RESOLVED FIXED

(Core :: Web Painting, enhancement, P2)

Description

[Miko Mynttinen]

We can avoid creating a local nsDisplayListCollection in nsBlockFrame::BuildDisplayList()1.

In DisplayLine(), the early-exit condition2 can be optimized and moved to nsBlockFrame::BuildDisplayList(), so we can avoid checking same things multiple times.

Comment 1

[Miko Mynttinen]

Attachment: Bug 1536778 - Part 1: Use aLists instead of linesDisplayListCollection r=mattwoodrow

Comment 2

[Miko Mynttinen]

Attachment: Bug 1536778 - Part 2: Optimize descending into lines r=mattwoodrow

Depends on D24166

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d5b4ff544e7f
Part 1: Use aLists instead of linesDisplayListCollection r=mattwoodrow
https://hg.mozilla.org/integration/autoland/rev/4c580575e563
Part 2: Optimize descending into lines r=mattwoodrow

Comment 4

[Stefan Hindli [:stefan_hindli]]

https://hg.mozilla.org/mozilla-central/rev/d5b4ff544e7f
https://hg.mozilla.org/mozilla-central/rev/4c580575e563