The wptexturize function in functions-formatting.php can be significantly improved by some simple refactoring. My measurements show this reduces the time spent inside wptexturize from 24% to 16% of total wp(), and the time of the function itself from 600ms to 200ms. This also reduces the number of preg_replace calls dramatically, from 10,439 to 3,289 and total time from 74ms to 36ms. Also, we’ve gone from 54ms of 6,410 str_replace calls to 29ms of 1,405 calls.
function wptexturize($text) {
$next = true;
$output = '';
$curl = '';
$textarr = preg_split('/(<.*>)/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$stop = count($textarr);
for($i = 0; $i < $stop; $i++){
$curl = $textarr[$i];
if (isset($curl{0}) && '<' != $curl{0} && $next) { // If it's not a tag
// static strings
$static_characters = array('—', ' — ', '–', 'xn--', '…', '“', '\'tain\'t', '\'twere', '\'twas', '\'tis', '\'twill', '\'til', '\'bout', '\'nuff', '\'round', '\'cause', '\'s', '\'\'', ' (tm)');
$static_replacements = array('---', ' -- ', '--', 'xn–', '...', '``', '’tain’t', '’twere', '’twas', '’tis', '’twill', '’til', '’bout', '’nuff', '’round', '’cause', '’s', '”', ' ™');
$curl = str_replace($static_characters, $static_replacements, $curl);
// regular expressions
$dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A)"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/');
$dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1“$2', '”$1', '’$1', '$1×$2');
$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);
} elseif (strstr($curl, '<code') || strstr($curl, '<pre') || strstr($curl, '<kbd' || strstr($curl, '<style') || strstr($curl, '<script'))) {
// strstr is fast
$next = false;
} else {
$next = true;
}
$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl);
$output .= $curl;
}
return $output;
}
I'll try and attach a patch...
