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Auto merge of #19512 - mbrubeck:uluru, r=emilio

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Improve LRU cache behavior in SelectorFlagsMap

This code used to insert duplicate entries to avoid expensive shuffling of the LRU cache.  With uluru this is no longer necessary, because reordering the cache is cheap.

Now it uses the `LRUCache::find` method from uluru 0.2 to update entries in-place.  This should increase cache hits by eliminating unnecessary evictions.

This PR also updates `arrayvec` because `uluru` depends on it, and `immeta` because it depends on `arrayvec`.

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they don't change behavior

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This commit is contained in:
bors-servo 2017-12-07 16:02:44 -06:00 • committed by GitHub
commit 0c13f14aaa
7 changed files with 29 additions and 43 deletions
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2
tests/unit/style/size_of.rs
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@ -12,7 +12,7 @@ size_of_test!(test_size_of_property_declaration, properties::PropertyDeclaration
// This is huge, but we allocate it on the stack and then never move it,
// we only pass `&mut SourcePropertyDeclaration` references around.
size_of_test!(test_size_of_parsed_declaration, properties::SourcePropertyDeclaration, 576);
size_of_test!(test_size_of_parsed_declaration, properties::SourcePropertyDeclaration, 568);
size_of_test!(test_size_of_selector_parse_error_kind, SelectorParseErrorKind, 40);
size_of_test!(test_size_of_style_parse_error_kind, ::style_traits::StyleParseErrorKind, 56);