From ba694719d46b49e1a75bda9ef43a57b4d8a22819 Mon Sep 17 00:00:00 2001
From: Herbert Wolverson <herberticus@gmail.com>
Date: Tue, 14 May 2024 13:20:06 -0500
Subject: [PATCH] Further improvement - return None if there are no non-zero
 stats on this round.

---
 src/rust/lts_client/src/collector/quick_drops/stats_diff.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/rust/lts_client/src/collector/quick_drops/stats_diff.rs b/src/rust/lts_client/src/collector/quick_drops/stats_diff.rs
index d92edd0f..174c4622 100644
--- a/src/rust/lts_client/src/collector/quick_drops/stats_diff.rs
+++ b/src/rust/lts_client/src/collector/quick_drops/stats_diff.rs
@@ -90,7 +90,11 @@ impl CakeTracker {
             up.retain(|u| u.drops > 0 || u.marks > 0);
             down.retain(|d| d.drops > 0 || d.marks > 0);
 
-            Some((up, down))
+            if up.is_empty() && down.is_empty() {
+                None
+            } else {
+                Some((up, down))
+            }
         }
     }
 }