From 2fb065b9fb70af0830098f5bc6eb1f5791f47837 Mon Sep 17 00:00:00 2001
From: ManyTheFish <many@meilisearch.com>
Date: Tue, 10 Dec 2024 11:00:20 +0100
Subject: [PATCH] Reduce merge allocations

---
 crates/milli/src/update/new/merger.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/milli/src/update/new/merger.rs b/crates/milli/src/update/new/merger.rs
index 9e87388a2..b7182f62f 100644
--- a/crates/milli/src/update/new/merger.rs
+++ b/crates/milli/src/update/new/merger.rs
@@ -240,7 +240,7 @@ fn merge_cbo_bitmaps(
                 "del is not a subset of current, which must be impossible."
             );
             let output = match add {
-                Some(add) => (&current - (&del - &add)) | (add - del),
+                Some(add) => (&current - (del - &add)) | add,
                 None => &current - del,
             };
             if output.is_empty() {