I installed this on two different domain/servers. On one of them, i encountered timeout issue (few weeks back) so i removed it as this wasnt really needed.

Now on another server, i have encountered timeout issue, i have lowered the cost to 4 but it made no difference, i have increased the time limit of this script from 30 to 40 and this has solved the issue but i just wondered why the scripts were running fine and then suddenly started having timeout issues