Indexer speed improvement: joined array vs. single lines

From my experience with a benchmark of the indexer it is faster to first
join the array of all index entries and then write them back together
instead of writing every single entry. This might increase memory usage,
but I couldn't see a significant increase and this function is also only
used for the small index files, not for the large pagewords index.

1 files changed, 1 insertions, 3 deletions

diff --git a/inc/indexer.php b/inc/indexer.php
index f5330040a..0a7e2265e 100644
--- a/inc/indexer.php
+++ b/inc/indexer.php
@@ -67,9 +67,7 @@ function idx_saveIndex($pre, $wlen, &$idx){
     $fn = $conf['indexdir'].'/'.$pre.$wlen;
     $fh = @fopen($fn.'.tmp','w');
     if(!$fh) return false;
-    foreach ($idx as $line) {
-        fwrite($fh,$line);
-    }
+    fwrite($fh,join('', $idx));
     fclose($fh);
     if(isset($conf['fperm'])) chmod($fn.'.tmp', $conf['fperm']);
     io_rename($fn.'.tmp', $fn.'.idx');