diff --git a/rtchallenge/src/camera.rs b/rtchallenge/src/camera.rs
index 1b2cc8f..d64770e 100644
--- a/rtchallenge/src/camera.rs
+++ b/rtchallenge/src/camera.rs
@@ -287,10 +287,10 @@ impl Camera {
     }
 
     /// This renderer use rayon to split each row into a seperate thread.  It
-    /// seems to have really bad performance (only ~6x speedup over serial), and
-    /// the flame graph looks a mess.  A strength over
-    /// `render_parallel_one_tread_per_core` is that it doesn't require `Camera`
-    /// and `World` to be cloneable.
+    /// seems to have more consistent performance than worker pool, equally fast
+    /// as WP at WP's fastest. The downside is the flame graph looks a mess.  A
+    /// strength over `render_parallel_one_tread_per_core` is that it doesn't
+    /// require `Camera` and `World` to be cloneable.
     fn render_parallel_rayon(&self, w: &World) -> Canvas {
         let image_mu = Mutex::new(Canvas::new(self.hsize, self.vsize, BLACK));