1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/clone-many-transferables.js b/js/src/tests/non262/extensions/clone-many-transferables.js
new file mode 100644
index 0000000000..463dc74ee7
--- /dev/null
+++ b/js/src/tests/non262/extensions/clone-many-transferables.js
@@ -0,0 +1,25 @@
+// |reftest| slow skip-if(!xulRuntime.shell) -- requires serialize()
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+function test()
+{
+  // On my system, with an unfixed build where transfer-list processing is
+  // quadratic, 5e5 elements makes this test take ~70s in a shell opt build.
+  // Debug build is well into timeout-land at 300+s.  As long as at least *one*
+  // platform times out for a quadratic algorithm, a regression should be
+  // obvious.  (Time to run the test in even a debug shell is ~17s, well short
+  // of timing out.)
+  var transfers = [];
+  for (var i = 0; i < 5e5; i++)
+    transfers.push(new ArrayBuffer());
+
+  // If serialization is quadratic in the length of |transfers|, the test will
+  // time out.  If the test doesn't time out, it passed.
+  serialize({}, transfers);
+}
+
+test();
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0, 'ok');