extern/nushell
1
0
Fork 1
mirror of https://github.com/nushell/nushell.git synced 2024-11-22 08:23:24 +01:00
Code Issues Packages Projects Releases Wiki Activity
0c4d5330ee
nushell/crates/nu_plugin_formats
History
Ian Manske 9996e4a1f8
Shrink the size of Expr (#12610) 
# Description
Continuing from #12568, this PR further reduces the size of `Expr` from
64 to 40 bytes. It also reduces `Expression` from 128 to 96 bytes and
`Type` from 32 to 24 bytes.

This was accomplished by:
- for `Expr` with multiple fields (e.g., `Expr::Thing(A, B, C)`),
merging the fields into new AST struct types and then boxing this struct
(e.g. `Expr::Thing(Box<ABC>)`).
- replacing `Vec<T>` with `Box<[T]>` in multiple places. `Expr`s and
`Expression`s should rarely be mutated, if at all, so this optimization
makes sense.

By reducing the size of these types, I didn't notice a large performance
improvement (at least compared to #12568). But this PR does reduce the
memory usage of nushell. My config is somewhat light so I only noticed a
difference of 1.4MiB (38.9MiB vs 37.5MiB).

---------

Co-authored-by: Stefan Holderbach <sholderbach@users.noreply.github.com>
2024-04-24 15:46:35 +00:00
..
src Shrink the size of Expr (#12610) 2024-04-24 15:46:35 +00:00
Cargo.toml Bump rust-ini from 0.20.0 to 0.21.0 (#12637) 2024-04-24 11:55:20 +00:00
README.md Move some from xxx commands to plugin (#7942) 2023-02-13 12:42:08 +00:00

README.md

nu_plugin_formats

A nushell plugin to convert data to nushell tables.

support commands:

  1. from eml - original ported from nushell core.
  2. from ics - original ported from nushell core.
  3. from ini - original ported from nushell core.
  4. from vcf - original ported from nushell core.

Prerequisite

nushell, It's a nushell plugin, so you need it.

Usage

  1. compile the binary: cargo build
  2. register plugin(assume it's compiled in ./target/debug/):
register ./target/debug/nu_plugin_formats