TL; DL How to reduce the first request of the site;
Personal,
I'm trying to improve the performance of a store in opencart, the problem is that the client uses Windows and I suspect that this is causing slowness, the site's rating on GTmetrix is 87% (PageSpeed) and 70% (YSlow ).
I have compressed CSS and JS, left JS asynchronous and improved legal, put some extensions in cache, but not 100%.
What takes more time is a 5.3kb request that takes 4 seconds for the response, as this request is the one that takes the longest time I think the problem is not in the code, but in some configuration of the server. For the total load time is about 7 seconds, only this request takes 4, if I solve it it would help me a lot.
The question would be how to reduce the time of this first request
Result link in GTmetrix, which shows this first request that is delaying: link