1 files changed, 20 insertions, 1 deletions
diff --git a/parser/html/nsHtml5ElementName.h b/parser/html/nsHtml5ElementName.h
index 6bf31a0add..737ac6b18d 100644
--- a/parser/html/nsHtml5ElementName.h
+++ b/parser/html/nsHtml5ElementName.h
@@ -108,10 +108,29 @@ class nsHtml5ElementName
       return !(flags & nsHtml5ElementName::NOT_INTERNED);
     }
 
+    inline static int32_t levelOrderBinarySearch(jArray<int32_t,int32_t> data, int32_t key)
+    {
+      int32_t n = data.length;
+      int32_t i = 0;
+      while (i < n) {
+        int32_t val = data[i];
+        if (val < key) {
+          i = 2 * i + 2;
+        } else if (val > key) {
+          i = 2 * i + 1;
+        } else {
+          return i;
+        }
+      }
+      return -1;
+    }
+
     inline static nsHtml5ElementName* elementNameByBuffer(char16_t* buf, int32_t offset, int32_t length, nsHtml5AtomTable* interner)
     {
       uint32_t hash = nsHtml5ElementName::bufToHash(buf, length);
-      int32_t index = nsHtml5ElementName::ELEMENT_HASHES.binarySearch(hash);
+      jArray<int32_t,int32_t> hashes;
+      hashes = nsHtml5ElementName::ELEMENT_HASHES;
+      int32_t index = levelOrderBinarySearch(hashes, hash);
       if (index < 0) {
         return nullptr;
       } else {