From 1896a9b01c5cd5f166c29cc21b93a718f049bf5c Mon Sep 17 00:00:00 2001
From: Alex Mills <Viper007Bond@users.noreply.github.com>
Date: Fri, 16 Nov 2018 16:03:24 -0800
Subject: [PATCH] Gutenberg Block Parsing: Bail earlier with a quick check if
 the block isn't being used.

---
 syntaxhighlighter.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/syntaxhighlighter.php b/syntaxhighlighter.php
index 4371183..6e5f84f 100644
--- a/syntaxhighlighter.php
+++ b/syntaxhighlighter.php
@@ -346,6 +346,11 @@ function enable_brushes_used_in_blocks( $content ) {
 			return $content;
 		}
 
+		// Lower overhead than a full parse.
+		if ( ! has_block( 'syntaxhighlighter/code', $content ) ) {
+			return $content;
+		}
+
 		$blocks = gutenberg_parse_blocks( $content );
 
 		foreach ( $blocks as $block ) {