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Auto merge of #18499 - heycam:rule-cache, r=emilio

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Rule cache

<!-- Please describe your changes on the following line: -->
This adds a TLS-based cache reset styles structs keyed off rule nodes.  Reviewed in https://bugzilla.mozilla.org/show_bug.cgi?id=1367635 by me and Emilio.

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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This commit is contained in:
bors-servo 2017-09-14 04:28:50 -05:00 • committed by GitHub
commit 874cb0d9df
21 changed files with 471 additions and 35 deletions
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12
components/style/values/specified/length.rs
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@ -132,9 +132,18 @@ impl FontRelativeLength {
match *self {
FontRelativeLength::Em(length) => {
if !matches!(base_size, FontBaseSize::InheritedStyle) {
context.rule_cache_conditions.borrow_mut()
.set_font_size_dependency(
reference_font_size.into()
);
}
(reference_font_size, length)
},
FontRelativeLength::Ex(length) => {
if context.for_non_inherited_property.is_some() {
context.rule_cache_conditions.borrow_mut().set_uncacheable();
}
let reference_size = match query_font_metrics(context, reference_font_size) {
FontMetricsQueryResult::Available(metrics) => {
metrics.x_height
@ -152,6 +161,9 @@ impl FontRelativeLength {
(reference_size, length)
},
FontRelativeLength::Ch(length) => {
if context.for_non_inherited_property.is_some() {
context.rule_cache_conditions.borrow_mut().set_uncacheable();
}
let reference_size = match query_font_metrics(context, reference_font_size) {
FontMetricsQueryResult::Available(metrics) => {
metrics.zero_advance_measure