diff --git a/includes/ApiDiscussionToolsCompare.php b/includes/ApiDiscussionToolsCompare.php
index 48d093570..da0610f9e 100644
--- a/includes/ApiDiscussionToolsCompare.php
+++ b/includes/ApiDiscussionToolsCompare.php
@@ -91,8 +91,8 @@ class ApiDiscussionToolsCompare extends ApiBase {
 			return;
 		}
 
-		$fromItemSet = HookUtils::parseRevisionParsoidHtml( $fromRev );
-		$toItemSet = HookUtils::parseRevisionParsoidHtml( $toRev );
+		$fromItemSet = HookUtils::parseRevisionParsoidHtml( $fromRev, __METHOD__ );
+		$toItemSet = HookUtils::parseRevisionParsoidHtml( $toRev, __METHOD__ );
 
 		$removedComments = [];
 		foreach ( $fromItemSet->getCommentItems() as $fromComment ) {
diff --git a/includes/ApiDiscussionToolsPageInfo.php b/includes/ApiDiscussionToolsPageInfo.php
index a0064cc02..ee12296c7 100644
--- a/includes/ApiDiscussionToolsPageInfo.php
+++ b/includes/ApiDiscussionToolsPageInfo.php
@@ -107,7 +107,7 @@ class ApiDiscussionToolsPageInfo extends ApiBase {
 			return new ContentThreadItemSet;
 		}
 
-		return HookUtils::parseRevisionParsoidHtml( $revision );
+		return HookUtils::parseRevisionParsoidHtml( $revision, __METHOD__ );
 	}
 
 	/**
diff --git a/includes/Hooks/DataUpdatesHooks.php b/includes/Hooks/DataUpdatesHooks.php
index 3017a7445..210bdbf4b 100644
--- a/includes/Hooks/DataUpdatesHooks.php
+++ b/includes/Hooks/DataUpdatesHooks.php
@@ -41,9 +41,10 @@ class DataUpdatesHooks implements RevisionDataUpdatesHook {
 		// TODO Deduplicate work between this and the Echo hook (make it use Parsoid too)
 		$rev = $renderedRevision->getRevision();
 		if ( HookUtils::isAvailableForTitle( $title ) ) {
-			$updates[] = new MWCallableUpdate( function () use ( $rev ) {
+			$method = __METHOD__;
+			$updates[] = new MWCallableUpdate( function () use ( $rev, $method ) {
 				try {
-					$threadItemSet = HookUtils::parseRevisionParsoidHtml( $rev );
+					$threadItemSet = HookUtils::parseRevisionParsoidHtml( $rev, $method );
 					$this->threadItemStore->insertThreadItems( $rev, $threadItemSet );
 				} catch ( Throwable $e ) {
 					// Catch errors, so that they don't cause other updates to fail (T315383), but log them.
diff --git a/includes/Hooks/HookUtils.php b/includes/Hooks/HookUtils.php
index 6de3b95b2..d336e33da 100644
--- a/includes/Hooks/HookUtils.php
+++ b/includes/Hooks/HookUtils.php
@@ -90,8 +90,10 @@ class HookUtils {
 	 * Parse a revision by using the discussion parser on the HTML provided by Parsoid.
 	 *
 	 * @param RevisionRecord $revRecord
-	 * @param bool $updateParserCache Whether the parser cache should be updated on cache miss.
+	 * @param string|false $updateParserCacheFor Whether the parser cache should be updated on cache miss.
 	 *        May be set to false for batch operations to avoid flooding the cache.
+	 *        Otherwise, it should be set to the name of the calling method (__METHOD__),
+	 *        so we can track what is causing parser cache writes.
 	 *
 	 * @return ContentThreadItemSet
 	 * @throws MWException
@@ -99,7 +101,7 @@ class HookUtils {
 	 */
 	public static function parseRevisionParsoidHtml(
 		RevisionRecord $revRecord,
-		$updateParserCache = true
+		$updateParserCacheFor
 	): ContentThreadItemSet {
 		$services = MediaWikiServices::getInstance();
 		$mainConfig = $services->getMainConfig();
@@ -112,14 +114,18 @@ class HookUtils {
 		Assert::postcondition( $pageRecord !== null, 'Revision had no page' );
 
 		$parserOptions = ParserOptions::newFromAnon();
-		$parserOptions->setRenderReason( __METHOD__ );
+
+		if ( $updateParserCacheFor ) {
+			// $updateParserCache contains the name of the calling method
+			$parserOptions->setRenderReason( $updateParserCacheFor );
+		}
 
 		$status = $parsoidOutputAccess->getParserOutput(
 			$pageRecord,
 			$parserOptions,
 			$revRecord,
 			// Don't flood the parser cache
-			$updateParserCache ? 0 : ParsoidOutputAccess::OPT_NO_UPDATE_CACHE
+			$updateParserCacheFor ? 0 : ParsoidOutputAccess::OPT_NO_UPDATE_CACHE
 		);
 
 		if ( !$status->isOK() ) {