diff --git a/src/Model/User.php b/src/Model/User.php
index 38fe3b0ec..990df65db 100644
--- a/src/Model/User.php
+++ b/src/Model/User.php
@@ -164,6 +164,11 @@ class User
 	 */
 	public static function getIdForURL(string $url)
 	{
+		// Avoid any database requests when the hostname isn't even part of the url.
+		if (!strpos($url, DI::baseUrl()->getHostname())) {
+			return 0;
+		}
+
 		$self = Contact::selectFirst(['uid'], ['self' => true, 'nurl' => Strings::normaliseLink($url)]);
 		if (!empty($self['uid'])) {
 			return $self['uid'];
diff --git a/src/Network/Probe.php b/src/Network/Probe.php
index 137f24575..99e62fb46 100644
--- a/src/Network/Probe.php
+++ b/src/Network/Probe.php
@@ -2012,6 +2012,14 @@ class Probe
 	 */
 	public static function getLastUpdate(array $data)
 	{
+		$uid = User::getIdForURL($data['url']);
+		if (!empty($uid)) {
+			$contact = Contact::selectFirst(['url', 'last-item'], ['self' => true, 'uid' => $uid]);
+			if (!empty($contact['last-item'])) {
+				return $contact['last-item'];
+			}
+		}
+
 		if ($lastUpdate = self::updateFromNoScrape($data)) {
 			return $lastUpdate;
 		}