diff --git a/sway-utils/src/performance.rs b/sway-utils/src/performance.rs
index f13202eb..80e6f640 100644
--- a/sway-utils/src/performance.rs
+++ b/sway-utils/src/performance.rs
@@ -32,6 +32,13 @@ macro_rules! time_expr {
         #[cfg(feature = "profiler")]
         if let Some(cfg) = $build_config {
             println!("/dyno start {} {}", $pkg_name, $description);
+            {
+                let mut x = vec![];
+                for i in 0..1_000_000 {
+                    let w = i * i;
+                    x.push(w);
+                }
+            }
             let output = { $expression };
             println!("/dyno stop {} {}", $pkg_name, $description);
             output