Hi Borislav,
I’m sorry to hear about the issue you’re having and I’ll be happy to help.
The plugin is extremely optimized and will actually speed up your site. Benchmarking and speed has been a primary focus from the beginning. We’ve done extensive testing on all different combinations of servers, software, PHP versions, server loads, etc, to make sure that is scalable and efficient.
If you are having a slowdown, then you have an issue on your server that needs to get diagnosed.
There is no code in the plugin or jscripts.php file that would slow your site down. WordPress site slowdowns are most often caused by undiagnosed PHP errors, configuration issues, memory issues, database issues, missing modules, old mySQL versions, and old PHP versions.
At the top of the support forum there is a sticky post that we ask users to read because it guides you to excellent troubleshooting options we have already put together for our plugin users.
Please take a few minutes to work through the Troubleshooting Guide and FAQs, as these solve 90% of issues users have. (Please be sure to follow all the steps, not just read through them.)
Please take special note of FAQ 15, as it specifically addresses your issue:
“Q: Will WP-SpamShield slow down my site, and is there anything I can do to optimize my site for it?” Real the full FAQ: http://www.redsandmarketing.com/plugins/wp-spamshield/faqs/#faqs_15
Excerpt from the FAQ:
A: WP-SpamShield will not slow down your site, and no further optimization is necessary. It is a very efficient plugin and has been optimized to use a very light server load. Because it keeps spam out of the WordPress database, and helps prevent database bloat, it actually speeds your site up in the long term compared to a site that does not use it.
Clients hire us day in and day out to optimize their sites, and we write plugins that help improve PageSpeed, so that’s one area we specialize in and would never let a plugin slow a site down.
Here is a breakdown…
For the rest of the FAQ, please click here to read it. Please read the full FAQ because it details our testing and benchmarking and shows how it is simply not possible for the jscripts.php to slow down a site.
If the information provided doesn’t solve the issue for you, we’ll need a bit more info from you on the specifics, and we’ll need to email back and forth, so please head over to the WP-SpamShield Support Form, and take a moment to fill out a support request. That will allow us to help you diagnose this, find out what the real issue is, and get things working right for you.
– Scott