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<title>[54327] trunk/src/wp-includes/blocks.php: Blocks: Remove extra `get_theme_file_path()` calls in `register_block_style_handle()`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/54327">54327</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/54327","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-09-27 15:09:14 +0000 (Tue, 27 Sep 2022)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Blocks: Remove extra `get_theme_file_path()` calls in `register_block_style_handle()`.

The `register_block_style_handle()` function runs ~200 times on each page load. Each time it runs, we call `get_theme_file_path()` and then run it through `wp_normalize_path()`.

`get_theme_file_path()` calls a few other functions: `get_stylesheet_directory()`, `get_stylesheet()`, `get_option()`, and there's a bunch of filters that run on each iteration of that, without ever changing.

By caching the value in a static variable, we can avoid ~200 calls on many functions and filters, improving performance.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/53091">[53091]</a>, <a href="https://core.trac.wordpress.org/changeset/54290">[54290]</a>, <a href="https://core.trac.wordpress.org/changeset/54291">[54291]</a>, <a href="https://core.trac.wordpress.org/changeset/54309">[54309]</a>.

Props aristath, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/56666">#56666</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesblocksphp">trunk/src/wp-includes/blocks.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpincludesblocksphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/blocks.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/blocks.php  2022-09-27 10:35:08 UTC (rev 54326)
+++ trunk/src/wp-includes/blocks.php    2022-09-27 15:09:14 UTC (rev 54327)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -127,13 +127,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">                return false;
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         // Path needs to be normalized to work in Windows env.
</span><span class="cx" style="display: block; padding: 0 10px">        $wpinc_path_norm  = wp_normalize_path( realpath( ABSPATH . WPINC ) );
</span><span class="cx" style="display: block; padding: 0 10px">        $theme_path_norm  = wp_normalize_path( get_theme_file_path() );
</span><span class="cx" style="display: block; padding: 0 10px">        $script_path_norm = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . $script_path ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $is_core_block    = isset( $metadata['file'] ) && 0 === strpos( $metadata['file'], $wpinc_path_norm );
-       $is_theme_block   = 0 === strpos( $script_path_norm, $theme_path_norm );
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        $is_core_block  = isset( $metadata['file'] ) && 0 === strpos( $metadata['file'], $wpinc_path_norm );
+       $is_theme_block = 0 === strpos( $script_path_norm, $theme_path_norm );
+
</ins><span class="cx" style="display: block; padding: 0 10px">         $script_uri = plugins_url( $script_path, $metadata['file'] );
</span><span class="cx" style="display: block; padding: 0 10px">        if ( $is_core_block ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $script_uri = includes_url( str_replace( $wpinc_path_norm, '', $script_path_norm ) );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -181,8 +183,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        $wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $theme_path_norm = wp_normalize_path( get_theme_file_path() );
-       $is_core_block   = isset( $metadata['file'] ) && 0 === strpos( $metadata['file'], $wpinc_path_norm );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       $is_core_block = isset( $metadata['file'] ) && 0 === strpos( $metadata['file'], $wpinc_path_norm );
</ins><span class="cx" style="display: block; padding: 0 10px">         // Skip registering individual styles for each core block when a bundled version provided.
</span><span class="cx" style="display: block; padding: 0 10px">        if ( $is_core_block && ! wp_should_load_separate_core_block_assets() ) {
</span><span class="cx" style="display: block; padding: 0 10px">                return false;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -212,15 +214,25 @@
</span><span class="cx" style="display: block; padding: 0 10px">        if ( $is_core_block ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $style_path = "style$suffix.css";
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         $style_path_norm = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . $style_path ) );
</span><span class="cx" style="display: block; padding: 0 10px">        $has_style_file  = '' !== $style_path_norm;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         if ( $has_style_file ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $style_uri      = plugins_url( $style_path, $metadata['file'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $style_uri = plugins_url( $style_path, $metadata['file'] );
+
+               // Cache $theme_path_norm to avoid calling get_theme_file_path() multiple times.
+               static $theme_path_norm = '';
+               if ( ! $theme_path_norm ) {
+                       $theme_path_norm = wp_normalize_path( get_theme_file_path() );
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $is_theme_block = str_starts_with( $style_path_norm, $theme_path_norm );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( $is_theme_block ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $style_uri = get_theme_file_uri( str_replace( $theme_path_norm, '', $style_path_norm ) );
</span><span class="cx" style="display: block; padding: 0 10px">                } elseif ( $is_core_block ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $style_uri  = includes_url( 'blocks/' . str_replace( 'core/', '', $metadata['name'] ) . "/style$suffix.css" );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $style_uri = includes_url( 'blocks/' . str_replace( 'core/', '', $metadata['name'] ) . "/style$suffix.css" );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        } else {
</span><span class="cx" style="display: block; padding: 0 10px">                $style_uri = false;
</span></span></pre>
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