The problem is your search. ghostHunter, the search library that you are using, fetches all posts, including the post content. That means 444 posts are loaded on refresh.
I really recommend you the open source search library that we made because you can specify to get only the title, url, reponsive image, pretty much what you need. So you’ll not have such a heavy loading on refresh. You can also make the library to get the posts when the user clicks on search input, not on page load.
You can see more about the library in this topic:
Feel free to ask any questions if you have.