this post was submitted on 31 Jul 2023
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I hopped from arch (2010-2019) to Nixos (2019-2023). I had my issues with it but being a functional programmer, I really liked the declarative style of configuring your OS. That was until last week. I decided to try out void Linux (musl). I'm happy with it so far.

Why did I switch?

  1. Nix is extremely slow and data intensive (compared to xbps). I mean sometimes 100-1000x or more. I know it is not a fair comparison because nix is doing much more. Even for small tweaks or dependency / toolchain update it'll download/rebuild all packages. This would mean 3-10GB (or more) download on Nixos for something that is a few KB or MB on xbps.

  2. Everything is noticeably slower. My system used way more CPU and Ram even during idle. CPU was at 1-3% during idle and my battery life was 2 to 3.5h. Xfce idle ram usage was 1.5 GB on Nixos. On Void it's around 0.5GB. I easily get 5-7h of battery life for my normal usage. It is 10h-12h if I am reading an ebook.

Nix disables a lot of compiler optimisations apparently for reproducibility. Maybe this is the reason?

  1. Just a lot of random bugs. Firefox would sometimes leak memory and hang. I have only 8 GB of ram. WiFi reconnecting all the time randomly. No such issues so far with void.

  2. Of course the abstractions and the language have a learning curve. It's harder for a beginner to package or do something which is not already exposed as an option. (This wasn't a big issue for me most of the time.)

For now, I'll enjoy the speed and simplicity of void. It has less packages compared to nix but I have flatpak if needed. So far, I had to install only Android studio with it.

My verdict is to use Nixos for servers and shared dev environments. For desktop it's probably not suitable for most.

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[–] [email protected] 1 points 1 year ago* (last edited 9 months ago)

edit: I do feel norawibb's point, the slippery mutability of Void is something I am a lot less comfortable with than I used to be. Apparently Guix has spoiled me.

[–] excitingburp 1 points 1 year ago (1 children)

data intensive

I take it you weren't using flakes?

[–] [email protected] 1 points 1 year ago

I was using flakes. I gave the reason why it's data intensive. If a core dependency like glibc is updated, it's hash will change and all packages that depend on it need to be rebuilt and rehashed. It'll download all packages again even though there's minimal change.

[–] [email protected] 1 points 1 year ago (1 children)

That is so the opposite experience for me. Every other distro for me just ends up weird after using it too long and I get the symptoms you mentioned. Nixos always stays perfectly clean for me like I never touched it. My hardware (long story) does change my experience a little though.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Yeah there's a lot of state accumulation especially in home folder which I clear manually from time to time.

In Nixos you can configure the impermanence module to clear unwanted state on your system and make it a "fresh install" on every reboot.

[–] [email protected] 0 points 1 year ago (1 children)

I only use nixos for my base configuration. All GUI desktop applications are installed through flatpak and development is done through distrobox.

[–] [email protected] 1 points 1 year ago

Interesting! Any reason for this choice instead of doing everything through nix?

[–] [email protected] 0 points 1 year ago (1 children)

I know you haven't used it for 4 years, but how would you compare arch to Nix and Void?

I'm asking because I'm using an arch based distro, but I've been eyeing both nix and void and wondering if they're worth trying.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Arch and void are very similar except void has a smaller community and much smaller set of packages to install. Arch also has better documentation.

Void is considered more lightweight because it uses runit instead of systemd and a choice to use musl instead of glibc.

I feel for most, arch is a better choice of the three.

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago) (1 children)

Really? In my experience NixOS is faster than Arch.

edit: this isn't arguing against him, i've heard lots of cases where Arch is indeed faster. For me though, I feel like nixos is faster for my use cases.

[–] [email protected] 0 points 1 year ago (1 children)

You mean in terms of how fast it feels? I have never heard anyone saying this before. Can you share some details and perhaps some tips to improve performance on Nixos?

What hardware do you run Nixos on and do you modify and rebuild a lot of packages on nixpkgs?

[–] [email protected] 0 points 1 year ago (1 children)

Could you also share the differences you perceived between Arch and Void ?

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

Void feel faster on old hardware due to systemd missing, the real problem is no-AUR imo.

[–] [email protected] 0 points 1 year ago (1 children)

Benefit. If you never used AUR before and never felt the need to use it.

[–] [email protected] 0 points 1 year ago (1 children)

I don't need a lot from the AUR, but a few packages I can't dl without. Tbf those would be in the official repos in other distros like fedora. I've got some weird bugs with fedora though. I just use endeavourOS cause it's so hassle free. One of the best distros period.

[–] [email protected] 1 points 1 year ago

I love EndeavorOS. It is basically just Arch plus 20 packages but it makes such a difference.

[–] [email protected] 0 points 1 year ago (2 children)

I think the verdict is NixOS is perfect for desktops, since you probably don't care about data or compiling everything or slight inefficiencies

[–] [email protected] 0 points 1 year ago (1 children)

That really depends on what kind of computer you are using and how fast your internet connection is. Also a desktop computer should be (for most people) as little maintanance work as possible and having long update/install times really stands in the way of that.

[–] [email protected] 1 points 1 year ago

Why? If it's installing singing in the background it's not stopping me from doing my work

[–] [email protected] 0 points 1 year ago (1 children)
[–] [email protected] 0 points 1 year ago (1 children)

It has to be! No one can hate themselves so much they deliberately go out of their way to use something needlessly slow

[–] [email protected] 1 points 1 year ago

I dispute the needlessly part. NixOS unstable has very new packages, do you're getting some fresh updates before some other packaging systems.

Is it less "efficient" than waiting for major versions? Of course. But I'm willing to run an update in the background on my desktop to get that new software.

[–] [email protected] 0 points 1 year ago (2 children)

In my experience, doing small changes to your nix config when using nix flakes seems to be faster. For me it only rebuilds everything when I run nix flake update before running sudo nixos-rebuild switch so it seems faster because it only does the thing that I changed instead of updating everything.

[–] [email protected] 0 points 1 year ago (1 children)

Yeah. Most small changes will not rebuild everything. It's just the core dependency updates that are most expensive. Like say openssl got a minor update. Now every package that depends on it needs to be rebuilt and rehashed because of the way nix store works.

[–] [email protected] 1 points 10 months ago

yeah that's currently in the works (ca-derivations)