From 0cf115b2de30ddbcda956dd4ac2725c016ef32e6 Mon Sep 17 00:00:00 2001
From: Mike Cao <mike@mikecao.com>
Date: Sun, 25 Apr 2021 18:32:06 -0700
Subject: [PATCH] Load lookup database only once.

---
 lib/request.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/request.js b/lib/request.js
index b30a710d..e5527f7d 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -12,6 +12,8 @@ import {
   MOBILE_SCREEN_WIDTH,
 } from './constants';
 
+let lookup;
+
 export function getIpAddress(req) {
   // Cloudflare
   if (req.headers['cf-connecting-ip']) {
@@ -61,7 +63,9 @@ export async function getCountry(req, ip) {
   }
 
   // Database lookup
-  const lookup = await maxmind.open(path.resolve('./public/geo/GeoLite2-Country.mmdb'));
+  if (!lookup) {
+    lookup = await maxmind.open(path.resolve('./public/geo/GeoLite2-Country.mmdb'));
+  }
 
   const result = lookup.get(ip);