Index: benchmark/creation/node_cor.js
===================================================================
--- benchmark/creation/node_cor.js	(revision c12869e252446e2346b620e01a91c06700f67b70)
+++ benchmark/creation/node_cor.js	(revision 03a4c732c41cec6ae90263ab98f94f3c2ea795c4)
@@ -5,4 +5,9 @@
 
 function * coroutine() { yield }
+
+for ( var i = 0; i < times; i += 1 ) { // warm jit
+	cor = coroutine()
+}
+
 var hrstart = process.hrtime()
 for ( var i = 0; i < times; i += 1 ) {