From 442f0831b16b496728114403d8fe41558b379f65 Mon Sep 17 00:00:00 2001
From: Kushan Joshi <0o3ko0@gmail.com>
Date: Mon, 21 Aug 2017 15:56:50 +0530
Subject: [PATCH] add enitity cache

---
 modules/services/osm.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/modules/services/osm.js b/modules/services/osm.js
index a395f85cd..c9e93ce45 100644
--- a/modules/services/osm.js
+++ b/modules/services/osm.js
@@ -19,6 +19,7 @@ var dispatch = d3.dispatch('authLoading', 'authDone', 'change', 'loading', 'load
     blacklists = ['.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*'],
     inflight = {},
     loadedTiles = {},
+    entityCache = {},
     tileZoom = 16,
     oauth = osmAuth({
         url: urlroot,
@@ -158,7 +159,13 @@ function parse(xml) {
         var child = children[i],
             parser = parsers[child.nodeName];
         if (parser) {
+            var uid = child.nodeName + child.attributes.id.value;
+            if (entityCache[uid]) {
+                console.log(uid, 'is cached');
+                continue;
+            }
             entities.push(parser(child));
+            entityCache[uid] = true;
         }
     }