From fe1f1ec79ab27578c6112a20c4bdba745dcf8cc3 Mon Sep 17 00:00:00 2001
From: kkapsner <github@mail.kkapsner.de>
Date: Wed, 12 Sep 2018 22:23:29 +0200
Subject: [PATCH] Fixed caching issue

md5 was too slow.

Fixes #236
---
 lib/modifiedDOMRectAPI.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/modifiedDOMRectAPI.js b/lib/modifiedDOMRectAPI.js
index e58f4fb..457a600 100644
--- a/lib/modifiedDOMRectAPI.js
+++ b/lib/modifiedDOMRectAPI.js
@@ -14,7 +14,7 @@
 	}
 	
 	const {hasType, checkerWrapper} = require("./modifiedAPIFunctions");
-	const {md5String: hash} = require("./hash");
+	const {byteArrayToString: hash} = require("./hash");
 	const getWrapped = require("sdk/getWrapped");
 	
 	
@@ -23,7 +23,6 @@
 		randomSupply = supply;
 	};
 	
-	const cache = new Map();
 	function getHash(domRect){
 		return hash(new Float64Array([domRect.x, domRect.y, domRect.width, domRect.height]));
 	}
@@ -45,6 +44,8 @@
 	function getDOMRectRegistration(domRect){
 		return registeredRects.get(getWrapped(domRect));
 	}
+	
+	const cache = {};
 	function getFakeDomRect(window, domRect, prefs, notify){
 		
 		var rng = randomSupply.getRng(4, window);
@@ -57,7 +58,7 @@
 			}
 		}
 		const hash = getHash(domRect);
-		let cached = cache.get(hash);
+		let cached = cache[hash];
 		if (!cached){
 			notify("fakedDOMRectReadout");
 			cached = new domRect.constructor(
@@ -66,7 +67,8 @@
 				getFakeValue(domRect.width, 2),
 				getFakeValue(domRect.height, 3)
 			);
-			cache.set(getHash(cached), cached);
+			cache[hash] = cached;
+			cache[getHash(cached)] = cached;
 		}
 		return cached;
 	}