first commit

wp-content/mu-plugins/local-dev-performance.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Reduce wp-admin latency in local Docker environments without outbound internet.
+ */
+
+if (!defined('ABSPATH')) {
+    exit;
+}
+
+if (function_exists('wp_get_environment_type') && wp_get_environment_type() !== 'local') {
+    return;
+}
+
+add_action('init', function () {
+    remove_action('admin_init', '_maybe_update_core');
+    remove_action('admin_init', '_maybe_update_plugins');
+    remove_action('admin_init', '_maybe_update_themes');
+
+    wp_clear_scheduled_hook('wp_version_check');
+    wp_clear_scheduled_hook('wp_update_plugins');
+    wp_clear_scheduled_hook('wp_update_themes');
+}, 1);
+
+add_filter('pre_site_transient_update_core', function () {
+    return (object) [
+        'updates' => [],
+        'last_checked' => time(),
+        'version_checked' => get_bloginfo('version'),
+    ];
+});
+
+add_filter('pre_site_transient_update_plugins', function () {
+    return (object) [
+        'last_checked' => time(),
+        'checked' => [],
+        'response' => [],
+        'no_update' => [],
+        'translations' => [],
+    ];
+});
+
+add_filter('pre_site_transient_update_themes', function () {
+    return (object) [
+        'last_checked' => time(),
+        'checked' => [],
+        'response' => [],
+        'no_update' => [],
+        'translations' => [],
+    ];
+});
+
+add_filter('automatic_updater_disabled', '__return_true');