From 579a7553851df822f7a825843ba6f5e91c6208d3 Mon Sep 17 00:00:00 2001
From: Fen Dweller <chemicalcrux@gmail.com>
Date: Thu, 9 Apr 2020 12:53:22 -0400
Subject: [PATCH] Speed up loads by only parsing units once for GIS-related
 entities

Cloning an existing unit and changing its value is a fair bit faster.
---
 presets/naturals.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/presets/naturals.js b/presets/naturals.js
index 583a18b6..b0796b72 100644
--- a/presets/naturals.js
+++ b/presets/naturals.js
@@ -929,25 +929,32 @@ function makeMountains() {
 }
 
 function makeGIS(data, category) {
+    const baseLength = math.unit(1, "meters");
+    const baseArea = math.unit(1, "meters^2");
     return {
         name: category,
         constructor: () => {
             views = {};
             data.forEach(entry => {
                 name = entry[0]
+                length = baseLength.clone();
+                area = baseArea.clone();
+                length.value = entry[2];
+                area.value = entry[1];
+
                 views[entry[0]] = {
                     attributes: {
                         height: {
                             name: "Size",
                             power: 1,
                             type: "length",
-                            base: math.unit(entry[2], "meters")
+                            base: length
                         },
                         area: {
                             name: "Area",
                             power: 2,
                             type: "area",
-                            base: math.unit(entry[1], "meters^2")
+                            base: area
                         },
                     },
                     name: name,