diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index 62feaffc6d..75d7a61000 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -3556,6 +3556,7 @@ function wp_ajax_get_revision_diffs() {
 
 	$return = array();
 
+	// Removes the script timeout limit by setting it to 0 allowing ample time for diff UI setup.
 	if ( function_exists( 'set_time_limit' ) ) {
 		set_time_limit( 0 );
 	}
diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index d3ca761c37..67996aef3f 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -524,6 +524,7 @@ class WP_Upgrader {
 		$destination       = $args['destination'];
 		$clear_destination = $args['clear_destination'];
 
+		// Give the upgrade an additional 300 seconds(5 minutes) to ensure the install doesn't prematurely timeout having used up the maximum script execution time upacking and downloading in WP_Upgrader->run.
 		if ( function_exists( 'set_time_limit' ) ) {
 			set_time_limit( 300 );
 		}
diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index edda202cc5..8b29771ced 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -962,6 +962,7 @@ function update_core( $from, $to ) {
 	global $wp_filesystem, $_old_files, $_old_requests_files, $_new_bundled_files, $wpdb;
 
 	if ( function_exists( 'set_time_limit' ) ) {
+		// Gives core update script time an additional 300 seconds(5 minutes) to finish updating large files or run on slower servers.
 		set_time_limit( 300 );
 	}
 
diff --git a/wp-includes/class-pop3.php b/wp-includes/class-pop3.php
index 7a72b1caf8..b4eab75044 100644
--- a/wp-includes/class-pop3.php
+++ b/wp-includes/class-pop3.php
@@ -60,6 +60,7 @@ class POP3 {
             settype($timeout,"integer");
             $this->TIMEOUT = $timeout;
             if(function_exists("set_time_limit")){
+                // Extends POP3 request timeout to specified TIMEOUT property.
                 set_time_limit($timeout);
             }
         }
@@ -75,6 +76,7 @@ class POP3 {
 
     function update_timer () {
         if(function_exists("set_time_limit")){
+            // Allows additional extension of POP3 request timeout to specified TIMEOUT property when update_timer is called.
             set_time_limit($this->TIMEOUT);
         }
         return true;
diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index e4cc901df9..d336399117 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -3116,6 +3116,7 @@ function pingback( $content, $post ) {
 
 		if ( $pingback_server_url ) {
 			if ( function_exists( 'set_time_limit' ) ) {
+				// Allows an additional 60 seconds for each pingback to complete.
 				set_time_limit( 60 );
 			}
 
diff --git a/wp-includes/deprecated.php b/wp-includes/deprecated.php
index 8b7d84b63e..e692772f27 100644
--- a/wp-includes/deprecated.php
+++ b/wp-includes/deprecated.php
@@ -3673,6 +3673,7 @@ function post_permalink( $post = 0 ) {
 function wp_get_http( $url, $file_path = false, $red = 1 ) {
 	_deprecated_function( __FUNCTION__, '4.4.0', 'WP_Http' );
 
+	// Adds an additional 60 seconds to the script timeout to ensure the remote request has enough time.
 	if ( function_exists( 'set_time_limit' ) ) {
 		@set_time_limit( 60 );
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4cd8e7c4ca..e4dd889496 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.7-alpha-59038';
+$wp_version = '6.7-alpha-59039';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.