From c2dd5d4a75c0c556755a1f29c14adcab124bc887 Mon Sep 17 00:00:00 2001
From: Andrew Nacin <nacin@git.wordpress.org>
Date: Tue, 4 Mar 2014 07:10:46 +0000
Subject: [PATCH] Bail early from shortcode functions if no delimiter is
 present.

This is a significant performance improvement for processing content without shortcodes, and only the slightest hit when content contains shortcodes (which must then undergo processing anyway). Performance results on the ticket.

props TobiasBg.
fixes #23855.


git-svn-id: https://develop.svn.wordpress.org/trunk@27394 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/shortcodes.php | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/wp-includes/shortcodes.php b/src/wp-includes/shortcodes.php
index 0b2b7327ff..15f8561d5b 100644
--- a/src/wp-includes/shortcodes.php
+++ b/src/wp-includes/shortcodes.php
@@ -155,6 +155,10 @@ function shortcode_exists( $tag ) {
  * @return boolean
  */
 function has_shortcode( $content, $tag ) {
+	if ( false === strpos( $content, '[' ) ) {
+		return false;
+	}
+
 	if ( shortcode_exists( $tag ) ) {
 		preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches, PREG_SET_ORDER );
 		if ( empty( $matches ) )
@@ -186,6 +190,10 @@ function has_shortcode( $content, $tag ) {
 function do_shortcode($content) {
 	global $shortcode_tags;
 
+	if ( false === strpos( $content, '[' ) ) {
+		return $content;
+	}
+
 	if (empty($shortcode_tags) || !is_array($shortcode_tags))
 		return $content;
 
@@ -375,6 +383,10 @@ function shortcode_atts( $pairs, $atts, $shortcode = '' ) {
 function strip_shortcodes( $content ) {
 	global $shortcode_tags;
 
+	if ( false === strpos( $content, '[' ) ) {
+		return $content;
+	}
+
 	if (empty($shortcode_tags) || !is_array($shortcode_tags))
 		return $content;