diff --git a/_benchmarks/assignment-vs-recalculation.md b/_benchmarks/assignment-vs-recalculation.md
new file mode 100644
index 00000000..421f7355
--- /dev/null
+++ b/_benchmarks/assignment-vs-recalculation.md
@@ -0,0 +1,15 @@
+---
+title: assignment vs recalculation
+setup: |
+  var source = {c: "c", d: "d"};
+tests:
+  -
+    name: assignment
+    code: |
+      var result = Object.assign({}, source);
+  -
+    name: recalculation
+    code: |
+      var result = {c: "c", d: "d"};
+---
+assignment vs recalculation