From bd513f4b92b4407ddc68e756122102c8d197cad9 Mon Sep 17 00:00:00 2001
From: Marcel <marehr@users.noreply.github.com>
Date: Fri, 28 Aug 2020 09:22:52 +0200
Subject: [PATCH] [MISC] pairwise_combine: compute size only once (#2059)

* [MISC pairwise_combine: compute size only once

Co-authored-by: rrahn <rene.rahn@fu-berlin.de>
---
 include/seqan3/range/views/pairwise_combine.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/seqan3/range/views/pairwise_combine.hpp b/include/seqan3/range/views/pairwise_combine.hpp
index 14d83c6cb6..4afdc8e38e 100644
--- a/include/seqan3/range/views/pairwise_combine.hpp
+++ b/include/seqan3/range/views/pairwise_combine.hpp
@@ -219,7 +219,8 @@ class pairwise_combine_view : public std::ranges::view_interface<pairwise_combin
         requires std::ranges::sized_range<underlying_range_type>
     //!\endcond
     {
-        return (std::ranges::size(u_range) * (std::ranges::size(u_range) - 1) / 2);
+        auto const size = std::ranges::size(u_range);
+        return (size * (size - 1)) / 2;
     }
     //!\}