diff --git a/include/boost/asio/detail/thread_info_base.hpp b/include/boost/asio/detail/thread_info_base.hpp
index a05320ab..35c03cbb 100644
--- a/include/boost/asio/detail/thread_info_base.hpp
+++ b/include/boost/asio/detail/thread_info_base.hpp
@@ -66,7 +66,13 @@ public:
   ~thread_info_base()
   {
     for (int i = 0; i < max_mem_index; ++i)
-      ::operator delete(reusable_memory_[i]);
+    {
+      // The following test for non-null pointers is technically redundant, but
+      // it is significantly faster when using a tight io_context::poll() loop
+      // in latency sensitive applications.
+      if (reusable_memory_[i])
+        ::operator delete(reusable_memory_[i]);
+    }
   }
 
   static void* allocate(thread_info_base* this_thread, std::size_t size)