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-rw-r--r--components/script/dom/performance.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/components/script/dom/performance.rs b/components/script/dom/performance.rs
index b566d4308fd..71ed3b186ea 100644
--- a/components/script/dom/performance.rs
+++ b/components/script/dom/performance.rs
@@ -15,6 +15,7 @@ use time;
pub type DOMHighResTimeStamp = Finite<f64>;
#[dom_struct]
+#[derive(HeapSizeOf)]
pub struct Performance {
reflector_: Reflector,
timing: JS<PerformanceTiming>,