diff --git a/cmd/tools/fast/fast.v b/cmd/tools/fast/fast.v
index c3c800d53e..c3f2f33a84 100644
--- a/cmd/tools/fast/fast.v
+++ b/cmd/tools/fast/fast.v
@@ -4,7 +4,8 @@
 import os
 import time
 
-const voptions = ' -skip-unused -usecache -show-timings -stats '
+// TODO -usecache
+const voptions = ' -skip-unused -show-timings -stats '
 
 fn main() {
 	exe := os.executable()