diff --git a/resources/skins.vector.search/instrumentation.js b/resources/skins.vector.search/instrumentation.js
index 4578326f9..8ec37b74c 100644
--- a/resources/skins.vector.search/instrumentation.js
+++ b/resources/skins.vector.search/instrumentation.js
@@ -4,37 +4,6 @@
  *
  * @see https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/skins/Vector/+/refs/heads/master/includes/Constants.php
  */
-const INPUT_LOCATION_MOVED = 'header-moved',
-	// T251544: Collect search performance metrics to compare Vue search with
-	// mediawiki.searchSuggest performance. Marks and Measures will only be
-	// recorded on the Vector skin and only if browser supported.
-	shouldTestSearchPerformance = !!( window.performance &&
-		!!performance.mark &&
-		!!performance.measure &&
-		!!performance.getEntriesByName &&
-		performance.clearMarks ),
-	loadStartMark = 'mwVectorVueSearchLoadStart',
-	queryMark = 'mwVectorVueSearchQuery',
-	renderMark = 'mwVectorVueSearchRender',
-	queryToRenderMeasure = 'mwVectorVueSearchQueryToRender',
-	loadStartToFirstRenderMeasure = 'mwVectorVueSearchLoadStartToFirstRender';
-
-function onFetchStart() {
-	if ( !shouldTestSearchPerformance ) {
-		return;
-	}
-
-	// Clear past marks that are no longer relevant. This likely means that the
-	// search request failed or was cancelled. Whatever the reason, the mark
-	// is no longer needed since we are only interested in collecting the time
-	// from query to render.
-	if ( performance.getEntriesByName( queryMark ).length ) {
-		performance.clearMarks( queryMark );
-	}
-
-	performance.mark( queryMark );
-}
-
 /**
  * @param {FetchEndEvent} event
  */
@@ -45,38 +14,8 @@ function onFetchEnd( event ) {
 		// resultSetType: '',
 		// searchId: '',
 		query: event.query,
-		inputLocation: INPUT_LOCATION_MOVED
+		inputLocation: 'header-moved'
 	} );
-
-	if ( shouldTestSearchPerformance ) {
-		// Schedule the mark after the search results have rendered and are
-		// visible to the user. Two rAF's are needed for this since rAF will
-		// execute before the rendering steps happen (e.g. layout and paint). A
-		// nested rAF will execute after these rendering steps have completed
-		// and ensure the search results are visible to the user.
-		requestAnimationFrame( () => {
-			requestAnimationFrame( () => {
-				if ( !performance.getEntriesByName( queryMark ).length ) {
-					return;
-				}
-
-				performance.mark( renderMark );
-				performance.measure( queryToRenderMeasure, queryMark, renderMark );
-
-				// Measure from the start of the lazy load to the first render if we
-				// haven't already captured that info.
-				if ( performance.getEntriesByName( loadStartMark ).length &&
-					!performance.getEntriesByName( loadStartToFirstRenderMeasure ).length ) {
-					performance.measure( loadStartToFirstRenderMeasure, loadStartMark, renderMark );
-				}
-
-				// The measures are the most meaningful info so we remove the marks
-				// after we have the measure.
-				performance.clearMarks( queryMark );
-				performance.clearMarks( renderMark );
-			} );
-		} );
-	}
 }
 
 /**
@@ -143,7 +82,6 @@ function addWprovToSearchResultUrls( results, offset ) {
  */
 module.exports = {
 	listeners: {
-		onFetchStart,
 		onFetchEnd,
 		onSuggestionClick,