Auto merge of #18460 - julian-seward1:master, r=emilio

Bug 1398593 - stylo: mitigate performance impact of fallible allocati…

…on on stylist rebuilds.  r=emilio.

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- [ ] These changes fix #__ (github issue number if applicable).

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2 files changed, 3 insertions, 2 deletions

diff --git a/components/fallible/lib.rs b/components/fallible/lib.rs
index 816e20573f9..4a48190a1eb 100644
--- a/components/fallible/lib.rs
+++ b/components/fallible/lib.rs
@@ -27,7 +27,7 @@ pub trait FallibleVec<T> {
 // Vec
 
 impl<T> FallibleVec<T> for Vec<T> {
-    #[inline]
+    #[inline(always)]
     fn try_push(&mut self, val: T) -> Result<(), FailedAllocationError> {
         #[cfg(feature = "known_system_malloc")]
         {
@@ -92,7 +92,7 @@ fn try_double_vec<T>(vec: &mut Vec<T>) -> Result<(), FailedAllocationError> {
 // SmallVec
 
 impl<T: Array> FallibleVec<T::Item> for SmallVec<T> {
-    #[inline]
+    #[inline(always)]
     fn try_push(&mut self, val: T::Item) -> Result<(), FailedAllocationError> {
         #[cfg(feature = "known_system_malloc")]
         {
diff --git a/components/hashglobe/src/hash_map.rs b/components/hashglobe/src/hash_map.rs
index c73f88cef66..69bd06344e0 100644
--- a/components/hashglobe/src/hash_map.rs
+++ b/components/hashglobe/src/hash_map.rs
@@ -1002,6 +1002,7 @@ impl<K, V, S> HashMap<K, V, S>
         self.try_entry(key).unwrap()
     }
 
+    #[inline(always)]
     pub fn try_entry(&mut self, key: K) -> Result<Entry<K, V>, FailedAllocationError> {
         // Gotta resize now.
         self.try_reserve(1)?;