From 0a96fd316bee069ae635d5ae1d2f4b4481163329 Mon Sep 17 00:00:00 2001
From: Matt Fishman <mtfishman@users.noreply.github.com>
Date: Tue, 14 May 2024 19:06:41 -0400
Subject: [PATCH] Small optimization and improved readability

---
 src/caches/beliefpropagationcache.jl | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/caches/beliefpropagationcache.jl b/src/caches/beliefpropagationcache.jl
index e583acf7..b980a52f 100644
--- a/src/caches/beliefpropagationcache.jl
+++ b/src/caches/beliefpropagationcache.jl
@@ -19,9 +19,9 @@ default_message_norm(m::ITensor) = norm(m)
 function default_message_update(contract_list::Vector{ITensor}; kwargs...)
   sequence = optimal_contraction_sequence(contract_list)
   updated_messages = contract(contract_list; sequence, kwargs...)
-  n = norm(updated_messages)
-  if !iszero(n)
-    updated_messages /= norm(updated_messages)
+  message_norm = norm(updated_messages)
+  if !iszero(message_norm)
+    updated_messages /= message_norm
   end
   return ITensor[updated_messages]
 end