Optimize the processing of text between nodes

Instead of processing the text token one by one in the main loop, it is
now processed in batch until the next special token (< and & which have
special handling in the main loop and NUL characters which need to report
a parse error).

Author: stof

src/HTML5/Parser/Tokenizer.php

@@ -163,15 +163,21 @@ protected function consumeData()
                     break;
 
                 default:
-                    if ('<' !== $tok && '&' !== $tok) {
-                        // NULL character
-                        if ("\00" === $tok) {
-                            $this->parseError('Received null character.');
-                        }
+                    if ('<' === $tok || '&' === $tok) {
+                        break;
+                    }
+
+                    // NULL character
+                    if ("\00" === $tok) {
+                        $this->parseError('Received null character.');
 
                         $this->text .= $tok;
                         $this->scanner->consume();
+
+                        break;
                     }
+
+                    $this->text .= $this->scanner->charsUntil("<&\0");
             }
         }