Rafael Azevedo:
> Hi there,
>
> We're testing a custom filter for PHP using spawn services.
>
> During our tests, we noticed that every time that we invoke the
> check_policy_service through docker container it takes about 1 second to
> run the filter script.
The mistake is to EXIT the PHP script. It should be written as a loop:
while (true) {
receive request
if EOF, exit
send response
}
And it should have a command time limit as described in
http://www.postfix.org/SMTPD_POLICY_README.html
On a busy server this will reuse the PHP process multiple times,
only the process startup will be slow.
To improve performance further, you would not use the spawn service,
but run the script as a long-running process that accepts connections
itself.
Wietse
