Here’s an introduction to mirror ranking:
https://discovery.endeavouros.com/pacman/mirrors-intro/2021/03/
As the vast majority of the packages come from the Arch mirrors, the speed problems are typically related to those mirrors. So ranking the Arch mirrors is usually the solution.
For that you have these apps directly available:
- rate-mirrors
- reflector
- reflector-simple (=GUI wrapper for reflector)
I assume rate-mirrors is a great choice for your location. But of course, experimenting with any and/or all of them may provide the best result.
If the native EndeavourOS mirrors seem slow, they can be ranked with
- eos-rankmirrors
- rate-mirrors
Note that you can also manually test some mirrors by downloading the same package from a few mirrors.
Then
- measure the elapsed time (faster = better)
- check the package version (newer = better)
This may help because ranking apps sometimes do not provide optimal results.
Also, sometimes mirrors can be temporarily offline which can change the ranking outcome.
Note that many (but not all) mirrors from Germany and United States are good for worldwide use.