1 files changed, 2 insertions, 1 deletions

diff --git a/zen/guid.h b/zen/guid.h
index 42119674..acc07fa0 100644
--- a/zen/guid.h
+++ b/zen/guid.h
@@ -28,7 +28,8 @@ namespace zen
 inline
 std::string generateGUID() //creates a 16 byte GUID
 {
-    boost::uuids::uuid nativeRep = boost::uuids::random_generator()();
+    boost::uuids::uuid nativeRep = boost::uuids::random_generator()(); //generator is thread-safe like an int
+    //perf: generator: 0.22ms per call; retrieve GUID: 0.12µs per call
     return std::string(nativeRep.begin(), nativeRep.end());
 }
 }