From 250757c1a17604ab7522216c3282783eb1cccd67 Mon Sep 17 00:00:00 2001
From: WenMing <moonbingbing@gmail.com>
Date: Wed, 9 Jan 2019 02:28:37 +0800
Subject: [PATCH] perf(pdk) optimize kong.ip module by tracking a table size
 via a local

From #4169
---
 kong/pdk/ip.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kong/pdk/ip.lua b/kong/pdk/ip.lua
index bec7ea3895c9..23449068efb6 100644
--- a/kong/pdk/ip.lua
+++ b/kong/pdk/ip.lua
@@ -41,11 +41,13 @@ local function new(self)
   -- supports.  Also as an optimization we will only compile trusted ips if
   -- Kong is not run with the default 0.0.0.0/0, ::/0 aka trust all ip
   -- addresses settings.
+  local idx = 1
   for i = 1, n_ips do
     local address = ips[i]
 
     if ip.valid(address) then
-      table.insert(trusted_ips, address)
+      trusted_ips[idx] = address
+      idx = idx + 1
 
       if address == "0.0.0.0/0" then
         trust_all_ipv4 = true