First commit.

framework/Measure.js

@@ -0,0 +1,49 @@
+export default class Measure {
+
+	startTimes	= {};
+
+	endTimes	= {};
+
+	writeToPage = false;
+
+	element		= false;
+
+	start ( label ) {
+
+		this.startTimes[ label ] = performance.now();
+	}
+
+	end ( label ) {
+
+		this.endTimes[ label ] = performance.now();
+
+		this.log( label );
+	}
+
+	getElapsed ( label ) {
+
+		if ( this.startTimes[ label ] === undefined || this.endTimes[ label ] === undefined ) {
+
+			throw new Error( "Start or end time missing for label: " + label );
+		}
+
+		return this.endTimes[ label ] - this.startTimes[ label ];
+	}
+
+	log ( label ) {
+
+		const elapsed = this.getElapsed( label );
+
+		if( this.writeToPage ) {
+
+			var p = document.createElement("p")
+
+			p.innerText = label + " took " + elapsed.toFixed(3) + " ms";
+
+			this.element.appendChild( p );
+
+		}
+
+		console.log( label + " took " + elapsed.toFixed(3) + " ms" );
+	}
+}