measure completion impact on the startup time of `nushell`

README.md

measure completion impact on the startup time of nushell

use mod.nu *

setup /path/to/nu_scripts/

bench profile-none.nu 20
bench profile-cargo.nu 20
bench profile-git.nu 20
bench profile-both.nu 20

env.nu

let-env NU_LIB_DIRS = [
    UNDEFINED_PATH_TO_NU_SCRIPTS
]

mod.nu

def avg [] {
    let timestamps = $in
    $"($timestamps | into decimal | math avg)ns" | into duration
}

def stddev [] {
    let timestamps = $in
    $"($timestamps | into decimal | math stddev)ns" | into duration
}

def report [label: string] {
    let times = $in

    print $"($label): ($times| avg) +/- ($times| stddev)"
}

export def bench [
    config_file: path
    n: int = 20
] {
    seq 1 $n | each {|| (
        nu -c 'echo $nu.startup-time | into int'
            --config $config_file
            --env-config env.nu
    )} | report ($config_file | path basename)
}

export def setup [nu_scripts: path] {
    $'let-env NU_LIB_DIRS = [
    "($nu_scripts)"
]' | save --force env.nu
}

profile-both.nu

use custom-completions/git/git-completions.nu
use custom-completions/cargo/cargo-completions.nu

profile-cargo.nu

use custom-completions/cargo/cargo-completions.nu

profile-git.nu

use custom-completions/git/git-completions.nu

profile-none.nu

result-arch.nuon

{both: [213383869, 212126272, 212392769, 212725399, 213365143, 212206931, 213353982, 212126496, 212310899, 212716662, 212644568, 211859593, 212438047, 214090968, 212893028, 212782755, 212394082, 213438719, 223471046, 221872324], git: [204395437, 203897022, 200689007, 200717724, 211016665, 320525936, 201068894, 202979882, 203737490, 201234809, 206308874, 201644560, 214726553, 199858860, 206484354, 200453443, 212500968, 201990301, 201578361, 221872324], cargo: [198841958, 198775544, 199025851, 198286337, 200197399, 198399776, 198311582, 202599892, 199501680, 198655810, 198950735, 198298316, 198431204, 200054697, 198007127, 204722712, 200993127, 200732191, 198690829, 221872324], none: [180171686, 181943108, 181253136, 180325682, 181069001, 183661353, 187985869, 181229038, 181313165, 181336538, 181134508, 181668784, 181477145, 180354438, 184802748, 182028881, 182651768, 181109132, 181896311, 221872324]}

result-ubuntu.nuon

{both: [603866669, 602307888, 600562757, 595944812, 596513386, 600088862, 600301301, 595725574, 595174980, 595941433, 603800332, 594602577, 592844312, 600576033, 593618649, 597364897, 593411914, 593928048, 604669209, 522855900], git: [553150176, 545832806, 590580978, 542059048, 542208973, 552458721, 550544796, 546339023, 555553407, 544348836, 550807077, 545618953, 550688234, 553294199, 550625486, 541439849, 560754577, 548658274, 548109904, 477008864], cargo: [529782169, 522380374, 527557480, 533037989, 524280461, 521616805, 533216144, 519362040, 532224437, 543444697, 521051938, 530064247, 522033306, 522588593, 530163385, 525985077, 525364463, 523193585, 528813798, 477008864], none: [462928268, 462895027, 459714452, 463441960, 459946208, 462709562, 461018626, 461234200, 451868031, 467868160, 459129602, 463333368, 460677512, 453740024, 467542539, 459655143, 467583169, 468954777, 465074873, 477069807]}