diff --git a/benchmark/string-concat b/benchmark/string-concat
new file mode 100644
index 00000000..c4a91748
--- /dev/null
+++ b/benchmark/string-concat
@@ -0,0 +1,8 @@
+require 'benchmark/ips'
+
+url = "http://jekyllrb.com"
+
+Benchmark.ips do |x|
+  x.report('+=') { url += '/' }
+  x.report('<<') { url << '/' }
+end