diff --git a/packages/e2e-tests/specs/performance/post-editor.test.js b/packages/e2e-tests/specs/performance/post-editor.test.js
index 969aa28c820b37..769b36817052f8 100644
--- a/packages/e2e-tests/specs/performance/post-editor.test.js
+++ b/packages/e2e-tests/specs/performance/post-editor.test.js
@@ -27,8 +27,8 @@ import {
 	getTypingEventDurations,
 	getClickEventDurations,
 	getHoverEventDurations,
-	getSelectionEventDurations,
 	getLoadingDurations,
+	getDiffBetweenEventStarts,
 } from './utils';
 
 jest.setTimeout( 1000000 );
@@ -249,9 +249,13 @@ describe( 'Post Editor Performance', () => {
 			await page.keyboard.type( 'a' );
 			await page.tracing.stop();
 			traceResults = JSON.parse( readFile( traceFile ) );
-			const [ focusEvents, keyDownEvents ] =
-				getSelectionEventDurations( traceResults );
-			results.focus.push( keyDownEvents[ 0 ] - focusEvents[ 0 ] );
+			results.focus.push(
+				getDiffBetweenEventStarts(
+					traceResults,
+					'pointerdown',
+					'keydown'
+				)
+			);
 		}
 	} );
 
diff --git a/packages/e2e-tests/specs/performance/utils.js b/packages/e2e-tests/specs/performance/utils.js
index b52c33796e2519..0725df64eb0961 100644
--- a/packages/e2e-tests/specs/performance/utils.js
+++ b/packages/e2e-tests/specs/performance/utils.js
@@ -15,42 +15,39 @@ export function deleteFile( filePath ) {
 	}
 }
 
-function isEvent( item ) {
+function isEvent( item, type ) {
 	return (
 		item.cat === 'devtools.timeline' &&
 		item.name === 'EventDispatch' &&
 		item.dur &&
 		item.args &&
-		item.args.data
+		item.args.data &&
+		item.args.data.type === type
 	);
 }
 
 function isKeyDownEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'keydown';
+	return isEvent( item, 'keydown' );
 }
 
 function isKeyPressEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'keypress';
+	return isEvent( item, 'keypress' );
 }
 
 function isKeyUpEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'keyup';
-}
-
-function isFocusEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'focus';
+	return isEvent( item, 'keyup' );
 }
 
 function isClickEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'click';
+	return isEvent( item, 'click' );
 }
 
 function isMouseOverEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'mouseover';
+	return isEvent( item, 'mouseover' );
 }
 
 function isMouseOutEvent( item ) {
-	return isEvent( item ) && item.args.data.type === 'mouseout';
+	return isEvent( item, 'mouseout' );
 }
 
 function getEventDurationsForType( trace, filterFunction ) {
@@ -59,12 +56,6 @@ function getEventDurationsForType( trace, filterFunction ) {
 		.map( ( item ) => item.dur / 1000 );
 }
 
-function getEventStartForType( trace, filterFunction ) {
-	return trace.traceEvents
-		.filter( filterFunction )
-		.map( ( item ) => item.ts / 1000 );
-}
-
 export function getTypingEventDurations( trace ) {
 	return [
 		getEventDurationsForType( trace, isKeyDownEvent ),
@@ -73,11 +64,10 @@ export function getTypingEventDurations( trace ) {
 	];
 }
 
-export function getSelectionEventDurations( trace ) {
-	return [
-		getEventStartForType( trace, isFocusEvent ),
-		getEventStartForType( trace, isKeyDownEvent ),
-	];
+export function getDiffBetweenEventStarts( trace, aType, bType ) {
+	const aEvent = trace.traceEvents.find( ( item ) => isEvent( item, aType ) );
+	const bEvent = trace.traceEvents.find( ( item ) => isEvent( item, bType ) );
+	return ( bEvent.ts - aEvent.ts ) / 1000;
 }
 
 export function getClickEventDurations( trace ) {