nushell/crates/nu-cli/src/completions
Devyn Cairns 2ae9ad8676
Copy-on-write for record values (#12305)
# Description
This adds a `SharedCow` type as a transparent copy-on-write pointer that
clones to unique on mutate.

As an initial test, the `Record` within `Value::Record` is shared.

There are some pretty big wins for performance. I'll post benchmark
results in a comment. The biggest winner is nested access, as that would
have cloned the records for each cell path follow before and it doesn't
have to anymore.

The reusability of the `SharedCow` type is nice and I think it could be
used to clean up the previous work I did with `Arc` in `EngineState`.
It's meant to be a mostly transparent clone-on-write that just clones on
`.to_mut()` or `.into_owned()` if there are actually multiple
references, but avoids cloning if the reference is unique.

# User-Facing Changes
- `Value::Record` field is a different type (plugin authors)

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting
- [ ] use for `EngineState`
- [ ] use for `Value::List`
2024-04-14 01:42:03 +00:00
..
base.rs Send LSP Completion Item Kind (#11443) 2024-03-24 20:14:12 -05:00
command_completions.rs Send LSP Completion Item Kind (#11443) 2024-03-24 20:14:12 -05:00
completer.rs Rename IoStream to OutDest (#12433) 2024-04-09 16:48:32 +00:00
completion_common.rs Add command_prelude module (#12291) 2024-03-26 21:17:30 +00:00
completion_options.rs Use nightly clippy to kill dead code/fix style (#12334) 2024-03-30 09:17:28 +08:00
custom_completions.rs Rename IoStream to OutDest (#12433) 2024-04-09 16:48:32 +00:00
directory_completions.rs Add command_prelude module (#12291) 2024-03-26 21:17:30 +00:00
dotnu_completions.rs Send LSP Completion Item Kind (#11443) 2024-03-24 20:14:12 -05:00
file_completions.rs Add command_prelude module (#12291) 2024-03-26 21:17:30 +00:00
flag_completions.rs Add command_prelude module (#12291) 2024-03-26 21:17:30 +00:00
mod.rs Send LSP Completion Item Kind (#11443) 2024-03-24 20:14:12 -05:00
variable_completions.rs Copy-on-write for record values (#12305) 2024-04-14 01:42:03 +00:00