From ccef8f91eaafd012ba0f4033dc8f4948f8ab5d92 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Thu, 26 Nov 2020 14:43:30 +0300
Subject: [PATCH] Optimize flat_list::clear for the case of
 trivially-destructible types

---
 libs/util/include/psemek/util/flat_list.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libs/util/include/psemek/util/flat_list.hpp b/libs/util/include/psemek/util/flat_list.hpp
index c016eba0..3c8e9dec 100644
--- a/libs/util/include/psemek/util/flat_list.hpp
+++ b/libs/util/include/psemek/util/flat_list.hpp
@@ -162,6 +162,14 @@ namespace psemek::util
 	template <typename T, typename Handle>
 	void flat_list<T, Handle>::clear()
 	{
+		if constexpr (std::is_trivially_destructible_v<T>)
+		{
+			nodes_.reset();
+			capacity_ = 0;
+			first_ = null;
+			return;
+		}
+
 		if (size_ == 0)
 		{
 			nodes_.reset();