diff --git a/test/cpp/realloc/Makefile b/test/cpp/realloc/Makefile
new file mode 100644
index 0000000..57ffb87
--- /dev/null
+++ b/test/cpp/realloc/Makefile
@@ -0,0 +1,21 @@
+# This probably should not go into "make check", because it is an experiment,
+# not a test.  Specifically, it is meant to determine how likely realloc is
+# to avoid a copy.  This is poorly documented.
+
+run: realloc_test
+	for it in 1 4 64 ; do \
+		for nb in 1 8 64 512 ; do \
+			for mins in 64 512 ; do \
+				for maxs in 2048 262144 ; do \
+					for db in 8 64 ; do \
+						./realloc_test $$nb $$mins $$maxs $$db $$it \
+					; done \
+				; done \
+			; done \
+		; done \
+	; done \
+	> raw_stats
+
+CFLAGS = -Wall -g -std=c99
+LDLIBS = -ldl
+realloc_test: realloc_test.c