Too high RAM usage in tests

[mo8it]

After running cargo t --workspace, all of my RAM is used and my OOM starts killing processes. I have 16 GB of RAM. The tests that cause that are those of helix-tui. I tried using the -j 1 option, but it didn't help.
I can skip the tests of helix-tui for now. But are you planning to address this issue? A unit test shouldn't require 16 GB of RAM.

[mo8it]

After running cargo t --workspace --exclude helix-tui, the unit tests run to completion, but my RAM was at about 95% until the end. It might be worth reducing the memory usage of all tests if possible.

[kirawi]

I can't replicate. The highest it ever went was 1gb. What system & OS are you running, what is your system environment, and do you have a custom config for Rust?

[mo8it]

Hardware Information:

• Memory: 16,0 GiB
• Processor: AMD Ryzen™ 7 5800H with Radeon™ Graphics × 16
• Graphics: AMD Radeon™ Graphics

Software Information:

• OS Name: Fedora Linux 39.20240223.0 (Silverblue)
• OS Type: 64-bit
• GNOME Version: 45.4
• Windowing System: Wayland
• Kernel Version: Linux 6.7.5-200.fc39.x86_64

---

Content of ~/.cargo/config.toml:

[target.x86_64-unknown-linux-gnu]
linker = "clang"
rustflags = [
  "-C",
  "link-arg=-fuse-ld=/usr/bin/mold",
  "-C",
  "target-cpu=native",
]

[profile.release]
lto = true
codegen-units = 1