nushell/crates/nu-std
Antoine Stevan 3268ecd116
FEATURE: add the bench command to the standard library (#8969)
Should address the first point of
- https://github.com/nushell/nushell/issues/8696.

# Description
i've seen a few appearances of this `benchmark` idea in recent works on
`nu-std`, so i thought it would be great to add it finally.

# User-Facing Changes
a new `std bench` command to measure the performance of `nushell`
closures and code blocks.

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

# After Submitting
```
$nothing
```
2023-04-28 09:07:23 +02:00
..
lib FEATURE: add the bench command to the standard library (#8969) 2023-04-28 09:07:23 +02:00
src add iter module to standard library (#8899) 2023-04-18 16:01:36 -05:00
tests add filter-map command to std iter (#8926) 2023-04-19 19:09:10 +02:00
Cargo.toml Bump to 0.79.1 dev version (#8998) 2023-04-26 01:05:23 +02:00
CONTRIBUTING.md refactor the CONTRIBUTING.md guidelines for nu-std (#8912) 2023-04-19 22:21:27 +02:00
LICENSE add LICENSE to nu-std (#8803) 2023-04-07 13:39:21 -07:00
README.md refactor the CONTRIBUTING.md guidelines for nu-std (#8912) 2023-04-19 22:21:27 +02:00

Welcome to the standard library of `nushell`!

The standard library is a pure-nushell collection of custom commands which provide interactive utilities and building blocks for users writing casual scripts or complex applications.

To see what's here:

> use std
> help commands | select name usage | where name =~ "std "
╭────┬─────────────────────────────┬────────────────────────────────────────────────────────────────╮
│  # │            name             │                                usage                           │
├────┼─────────────────────────────┼────────────────────────────────────────────────────────────────┤
│  0 │ std assert                  │ Universal assert command                                       │
│  1 │ std assert equal            │ Assert $left == $right                                         │
           . . .
│ 11 │ std clip                    │ put the end of a pipe into the system clipboard.               │
│ 12 │ std dirs add                │ Add one or more directories to the list.                       │
           . . .
├────┼─────────────────────────────┼────────────────────────────────────────────────────────────────┤
│  # │            name             │                                usage                           │
╰────┴─────────────────────────────┴────────────────────────────────────────────────────────────────╯

🧰 Using the standard library in the REPL or in scripts

All commands in the standard library must be "imported" into the running environment (the interactive read-execute-print-loop (REPL) or a .nu script) using the use command.

You can choose to import the whole module, but then must refer to individual commands with a std prefix, e.g:

use std

std log debug "Running now"
std assert (1 == 2)

Or you can enumerate the specific commands you want to import and invoke them without the std prefix.

use std ["log debug" assert]

log debug "Running again"
assert (2 == 1)

This is probably the form of import you'll want to add to your env.nu for interactive use.

✏️ contribute to the standard library

You're invited to contribute to the standard library! See CONTRIBUTING.md for details