From 00de8ddf8d899a8c9a9ca89009f845f88eb7a6cc Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 06 Nov 2013 07:11:31 -0500
Subject: [PATCH] Small performance improvements, use str_replace() instead of strtr(), do not parse query if there are no params to replace, keep one instance of (potentially long) query less in memory
---
program/lib/Roundcube/rcube_db.php | 29 +++++++++++++++--------------
1 files changed, 15 insertions(+), 14 deletions(-)
diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php
index aaba281..2828f26 100644
--- a/program/lib/Roundcube/rcube_db.php
+++ b/program/lib/Roundcube/rcube_db.php
@@ -392,7 +392,7 @@
*/
protected function _query($query, $offset, $numrows, $params)
{
- $query = trim($query);
+ $query = ltrim($query);
$this->db_connect($this->dsn_select($query), true);
@@ -405,27 +405,28 @@
$query = $this->set_limit($query, $numrows, $offset);
}
- $params = (array) $params;
-
// Because in Roundcube we mostly use queries that are
// executed only once, we will not use prepared queries
$pos = 0;
$idx = 0;
- while ($pos = strpos($query, '?', $pos)) {
- if ($query[$pos+1] == '?') { // skip escaped ?
- $pos += 2;
- }
- else {
- $val = $this->quote($params[$idx++]);
- unset($params[$idx-1]);
- $query = substr_replace($query, $val, $pos, 1);
- $pos += strlen($val);
+ if (count($params)) {
+ while ($pos = strpos($query, '?', $pos)) {
+ if ($query[$pos+1] == '?') { // skip escaped '?'
+ $pos += 2;
+ }
+ else {
+ $val = $this->quote($params[$idx++]);
+ unset($params[$idx-1]);
+ $query = substr_replace($query, $val, $pos, 1);
+ $pos += strlen($val);
+ }
}
}
- // replace escaped ? back to normal
- $query = rtrim(strtr($query, array('??' => '?')), ';');
+ // replace escaped '?' back to normal, see self::quote()
+ $query = str_replace('??', '?', $query);
+ $query = rtrim($query, " \t\n\r\0\x0B;");
$this->debug($query);
--
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