we change some theme code of over theme. but now we face some issue like slow loading website, hang, pause for 5 to 10 mins and little more this kind of problem. we chat with shopify support then that tell us that all problem acore to regarding we chat some code so they say you help us to regarding this problem so please help ma as soon as possible over customer is complain as for this issue
Delete unused JS scripts and use / rewrite to liquid wherever possible. Delete the apps you don`t need & make sure to delete the code that is left after them. Compress images, too. Overall that should give a boost.