speed up get_packages by adding shortcut in has function

[SleepyBag]

I don't know if anyone else is suffering from the same issue. On my WSL 2, it takes 4 seconds and more to run neofetch. Most of the time is consumed by get_pacakges.

After investigation into the code. I think it unnecessary to try reaching all the possible package managers -- it would be a large bunch of disk operation.

So I add a shortcut in the has function -- once the variable $manager is set, all the following check of has would return false. That is, it will just take the first package manager it sees as the answer.

This simple modification makes significant improvement on my machine:

Before modification:

./neofetch  0.32s user 1.11s system 33% cpu 4.298 total

It takes 4.298 seconds in total.

After modification:

./neofetch  0.27s user 0.20s system 51% cpu 0.900 total

It takes 0.900 seconds in total.

[dylanaraps]

This breaks the whole point of why the code works the way it does, displaying packages from all installed package managers.
Have you looked at a verbose log to see what is taking so much time? ie, the real issue here.

[SleepyBag]

displaying packages from all installed package managers.

It seems that I did make a mistake.

Have you looked at a verbose log to see what is taking so much time? ie, the real issue here.

Actually, the has function takes most of time. On my machine, a failed has check takes 0.1 seconds, which is very painful as we have so many package managers to check one by one.

I think it will be good to let users make a shortcut, or skip this feature.

[dylanaraps]

Open an issue and fill out the template. I want to find out what's really causing this.

[SleepyBag]

I proposed another way keeping the current design while speeding up get_pakcage. Created a new PR #1857