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script: Measure heap usage of various ignored fields (#38791)

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These changes allow using MallocSizeOf/`#[conditional_malloc_size_of]`
on WebIDL callback values, and then fix a grab bag of places in the
script crate that previously ignored those values. There are also some
commits removing ignored fields that involved Arc/Rc that are not WebIDL
callbacks, since they are now easier to support with the
`#[conditional_malloc_size_of]` attribute.

Testing: Manual testing on about:memory for servo.org.

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
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Josh Matthews 2025-08-20 04:43:58 -04:00 • committed by GitHub
parent 604b6ea26d
commit 636e7211e0
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16 changed files with 44 additions and 38 deletions
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components/script/dom/raredata.rs
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@ -66,7 +66,7 @@ pub(crate) struct ElementRareData {
/// <https://html.spec.whatwg.org/multipage/#custom-element-reaction-queue>
pub(crate) custom_element_reaction_queue: Vec<CustomElementReaction>,
/// <https://dom.spec.whatwg.org/#concept-element-custom-element-definition>
#[ignore_malloc_size_of = "Rc"]
#[conditional_malloc_size_of]
pub(crate) custom_element_definition: Option<Rc<CustomElementDefinition>>,
/// <https://dom.spec.whatwg.org/#concept-element-custom-element-state>
pub(crate) custom_element_state: CustomElementState,