diff --git a/examples/marshal-stress.janet b/examples/marshal-stress.janet
new file mode 100644
index 00000000..b966b9ff
--- /dev/null
+++ b/examples/marshal-stress.janet
@@ -0,0 +1,30 @@
+(defn init-db [c]
+  (def res @{:clients @{}})
+  (var i 0)
+  (repeat c
+    (def n (string "client" i))
+    (put-in res [:clients n] @{:name n :projects @{}})
+    (++ i)
+    (repeat c
+      (def pn (string "project" i))
+      (put-in res [:clients n :projects pn] @{:name pn})
+      (++ i)
+      (repeat c
+        (def tn (string "task" i))
+        (put-in res [:clients n :projects pn :tasks tn] @{:name pn})
+        (++ i))))
+  res)
+
+(loop [c :range [30 80 1]]
+  (var s (os/clock))
+  (print "Marshal DB with " c " clients, "
+         (* c c) " projects and "
+         (* c c c) " tasks. "
+         "Total " (+ (* c c c) (* c c) c) " tables")
+  (def buf (marshal (init-db c) @{} @""))
+  (print "Buffer is " (length buf) " bytes")
+  (print "Duration " (- (os/clock) s))
+  (set s (os/clock))
+  (gccollect)
+  (print "Collected garbage in " (- (os/clock) s)))
+