Optimized example by caching out the conversion result, thanks @vjeux.

Author: elierotenberg

README.md

@@ -9,10 +9,13 @@ Usage
 var React = require("react");
 var fromCSS = require("react-css").fromCSS;
 
+/* Pre-compute the CSS to avoid lengthy calculations at each render cycle */
+var myComponentStyle = fromCSS("{ opacity: 0.5; }");
+
 var MyComponent = React.createClass({
 	render: function() {
 		return (
-			<div style={fromCSS("{ opacity: 0.5; }")}>
+			<div style={myComponentStyle}>
 				/* ... */
 			</div>
 		);