diff --git a/benchmark/gendoc.sh b/benchmark/gendoc.sh
index 76b37d3..1f4525e 100755
--- a/benchmark/gendoc.sh
+++ b/benchmark/gendoc.sh
@@ -44,3 +44,4 @@ echo "# Benchmarks"
 
 generate-table "Bootstrap Time" "./planck < bootstrap.fs benchmark/nop.fs" 1
 generate-table "Fib(30)" "./planck < bootstrap.fs benchmark/fib.fs" 1
+generate-table "Matmul" "./planck < bootstrap.fs benchmark/matmul.fs" 1
diff --git a/benchmark/matmul.fs b/benchmark/matmul.fs
new file mode 100644
index 0000000..080c8fa
--- /dev/null
+++ b/benchmark/matmul.fs
@@ -0,0 +1,33 @@
+60 constant M
+90 constant K
+60 constant N
+
+M K * cells allocate throw constant mat1
+K N * cells allocate throw constant mat2
+M N * cells allocate throw constant mat3
+
+:noname
+    M 0 do
+        K 0 do
+            i j + 1+ mat1 K j * i + cells + !
+        loop
+    loop
+
+    K 0 do
+        N 0 do
+            i j + 1+ mat2 N j * i + cells + !
+        loop
+    loop
+
+    M 0 do
+        N 0 do
+            0
+            K 0 do
+                mat1 K k * i + cells + @
+                mat2 N i * j + cells + @
+                * +
+            loop
+            mat3 N i * j + cells + !
+        loop
+    loop
+; execute