From 92f1d6447335fb0241aeac795eead32f52b79f60 Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Tue, 27 Feb 2018 09:33:46 -0500
Subject: [PATCH] Cache Renderer.isSupported because it takes 30ms every time
---
src/components/gui/gui.jsx | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/components/gui/gui.jsx b/src/components/gui/gui.jsx
index 488e705e8..da08720d1 100644
--- a/src/components/gui/gui.jsx
+++ b/src/components/gui/gui.jsx
@@ -33,6 +33,10 @@ const messages = defineMessages({
}
});
+// Cache this value to only retreive it once the first time.
+// Assume that it doesn't change for a session.
+let isRendererSupported = null;
+
const GUIComponent = props => {
const {
activeTabIndex,
@@ -66,7 +70,9 @@ const GUIComponent = props => {
tabSelected: classNames(tabStyles.reactTabsTabSelected, styles.isSelected)
};
- const isRendererSupported = Renderer.isSupported();
+ if (isRendererSupported === null) {
+ isRendererSupported = Renderer.isSupported();
+ }
return (
<Box
--
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