add some startup performance metrics (#7851)

# Description

This PR changes the old performance logging with `Instant` timers. I'm
not sure if this is the best way to do it but it does help reveal where
time is being spent on startup. This is what it looks like when you
launch nushell with `cargo run -- --log-level info`. I'm using the
`info` log level exclusively for performance monitoring at this point.

![image](https://user-images.githubusercontent.com/343840/214372903-fdfa9c99-b846-47f3-8faf-bd6ed98df3a9.png)
## After Startup

Since you're in the repl, you can continue running commands. Here's the
output of `ls`, for instance.

![image](https://user-images.githubusercontent.com/343840/214373035-4d2f6e2d-5c1d-43d3-b997-51d79d496ba3.png)
Note that the above screenshots are in debug mode, so they're much
slower than release.

# User-Facing Changes



# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
This commit is contained in:
Darren Schroeder
2023-01-24 14:28:59 -06:00
committed by GitHub
parent 41306aa7e0
commit d64e381085
8 changed files with 202 additions and 94 deletions

View File

@ -110,8 +110,6 @@ pub(crate) fn read_config_file(
eval_config_contents(config_path, engine_state, stack);
}
info!("read_config_file {}:{}:{}", file!(), line!(), column!());
}
pub(crate) fn read_loginshell_file(engine_state: &mut EngineState, stack: &mut Stack) {
@ -200,8 +198,6 @@ pub(crate) fn setup_config(
#[cfg(feature = "plugin")]
read_plugin_file(engine_state, stack, plugin_file, NUSHELL_FOLDER);
info!("read_config_file {}:{}:{}", file!(), line!(), column!());
read_config_file(engine_state, stack, env_file, true);
read_config_file(engine_state, stack, config_file, false);