From 88431be37966f89f2a96210ee855565212f34969 Mon Sep 17 00:00:00 2001
From: Christophe Coevoet <stof@notk.org>
Date: Sat, 24 Nov 2018 13:53:53 +0100
Subject: Optimize the parsing of unquoted attributes

---
 src/HTML5/Parser/Tokenizer.php | 38 ++++++++++++++++++++++++++++----------
 1 file changed, 28 insertions(+), 10 deletions(-)

(limited to 'src/HTML5/Parser')

diff --git a/src/HTML5/Parser/Tokenizer.php b/src/HTML5/Parser/Tokenizer.php
index 6284733..49f5fc0 100644
--- a/src/HTML5/Parser/Tokenizer.php
+++ b/src/HTML5/Parser/Tokenizer.php
@@ -594,19 +594,37 @@ class Tokenizer
 
     protected function unquotedAttributeValue()
     {
-        $stoplist = "\t\n\f >";
         $val = '';
         $tok = $this->scanner->current();
-        while (0 == strspn($tok, $stoplist) && false !== $tok) {
-            if ('&' == $tok) {
-                $val .= $this->decodeCharacterReference(true);
-                $tok = $this->scanner->current();
-            } else {
-                if (strspn($tok, "\"'<=`") > 0) {
+        while (false !== $tok) {
+            switch ($tok) {
+                case "\n":
+                case "\f":
+                case ' ':
+                case "\t":
+                case '>':
+                    break 2;
+
+                case '&':
+                    $val .= $this->decodeCharacterReference(true);
+                    $tok = $this->scanner->current();
+
+                    break;
+
+                case "'":
+                case '"':
+                case '<':
+                case '=':
+                case '`':
                     $this->parseError('Unexpected chars in unquoted attribute value %s', $tok);
-                }
-                $val .= $tok;
-                $tok = $this->scanner->next();
+                    $val .= $tok;
+                    $tok = $this->scanner->next();
+                    break;
+
+                default:
+                    $val .= $this->scanner->charsUntil("\t\n\f >&\"'<=`");
+
+                    $tok = $this->scanner->current();
             }
         }
 
-- 
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