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layout: Report memory usage for fragment and box trees. (#36553)

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Add memory reporter integration for the fragment and box trees that are
persisted in the layout thread.

Testing: Looked at the numbers for https://servo.org and
https://html.spec.whatwg.org/. The former was very small, but the latter
was 700mb.

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
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Josh Matthews 2025-04-18 16:05:15 -04:00 • committed by GitHub
parent add8c51f47
commit c787688afc
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33 changed files with 230 additions and 69 deletions
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5
components/layout_2020/flexbox/geom.rs
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@ -4,6 +4,7 @@
//! <https://drafts.csswg.org/css-flexbox/#box-model>
use malloc_size_of_derive::MallocSizeOf;
use style::properties::longhands::flex_direction::computed_value::T as FlexDirection;
use crate::geom::{LogicalRect, LogicalSides, LogicalVec2};
@ -67,7 +68,7 @@ impl<T> FlexRelativeSides<T> {
/// One of the two bits set by the `flex-direction` property
/// (The other is "forward" v.s. reverse.)
#[derive(Clone, Copy, Debug, PartialEq)]
#[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq)]
pub(super) enum FlexAxis {
/// The main axis is the inline axis of the container (not necessarily of flex items!),
/// cross is block.
@ -78,7 +79,7 @@ pub(super) enum FlexAxis {
/// Which flow-relative sides map to the main-start and cross-start sides, respectively.
/// See <https://drafts.csswg.org/css-flexbox/#box-model>
#[derive(Clone, Copy, Debug)]
#[derive(Clone, Copy, Debug, MallocSizeOf)]
pub(super) enum MainStartCrossStart {
InlineStartBlockStart,
InlineStartBlockEnd,