log file – too big-.. Blog is very slow..

Can somebody help me with it??? Lookplease to the answer my webhosting..

“Regarding the blog page, we see that your scripts.log was really large in size. This file is present in the logs folder in your file manager in webhosting control panel that collects the error details from the blog php scripts.
We have renamed and recreated this file and when we checked the new
dumps from the scripts.log file it appears that either a piece of custom code or one of your custom themes or plugins may be causing the issue.
Please check the same at your end or please contact wordpress support

Thanks a lot in advance