diff --git a/tools/fast/fast.v b/tools/fast/fast.v
index 5473efdc9f..602c9d12ae 100644
--- a/tools/fast/fast.v
+++ b/tools/fast/fast.v
@@ -29,9 +29,9 @@ fn main() {
 	println('Building vprod...')
 	exec('v -o $vdir/vprod -prod $vdir/v.v')
 	println('Measuring...')
-	diff1 := measure('$vdir/vprod -o v.c $vdir/v.v')
-	diff2 := measure('$vdir/vprod -o v2 $vdir/v.v')
-	diff3 := measure('$vdir/vprod -o v2 -fast $vdir/v.v')
+	diff1 := measure('$vdir/vprod -cc clang -o v.c $vdir/v.v')
+	diff2 := measure('$vdir/vprod -cc clang -o v2 $vdir/v.v')
+	diff3 := measure('$vdir/vprod -cc clang -o v2 -fast $vdir/v.v')
 	//println('Building V took ${diff}ms')
 	commit_date := exec('git log -n1 --pretty="format:%at"')
 	message := exec('git log -n1 --pretty="format:%s"')
diff --git a/tools/fast/header.html b/tools/fast/header.html
index 5518555f84..5d8687c705 100644
--- a/tools/fast/header.html
+++ b/tools/fast/header.html
@@ -18,9 +18,8 @@ td {
 <h2>Is V still fast?</h2>
 
 Monitoring the speed of the compilation for each commit. <br><br>
-
 Running on a $3.5/mo micro instance. <br><br>
-Source code: <a href='#'>fast.v</a> <br><br>
+Source code: <a target=blank href='https://github.com/vlang/v/blob/master/tools/fast/fast.v'>fast.v</a> <br><br>
 
 <table>
 	<tr>