From 28770c01187e405d6bbcb27d5cb4d6adc537c370 Mon Sep 17 00:00:00 2001
From: Xiaochen Wang <wangxiaochen0@gmail.com>
Date: Thu, 11 Jul 2024 14:40:04 +0800
Subject: [PATCH] perf(dns): reduce table creation

---
 kong/dns/utils.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kong/dns/utils.lua b/kong/dns/utils.lua
index 3158c5ce945e..1eb8ec9d357e 100644
--- a/kong/dns/utils.lua
+++ b/kong/dns/utils.lua
@@ -8,6 +8,7 @@ local type = type
 local ipairs = ipairs
 local tonumber = tonumber
 local math_random = math.random
+local table_clear = require("table.clear")
 local table_insert = table.insert
 local table_remove = table.remove
 
@@ -257,7 +258,8 @@ do
     for _, answer in ipairs(answers) do
       if answer.priority < lowest_priority then
         lowest_priority = answer.priority
-        l = { answer }
+        table_clear(l)
+        l[1] = answer
 
       elseif answer.priority == lowest_priority then
         table_insert(l, answer)