Extremely slow starts if kirbyup.config exists

[jonaskuske]

When there's a kirbyup.config.(js|mjs|...) in a project, kirbyup takes roughly 20x as long to start building (or with #18: serving) the plugin.

Without a kirbyup config, my plugin build finishes in ~0.7s. If a kirbyup config exists, it takes ~14s, almost all of which is the loading of the config. I added a console.log to my config file – nothing happens for ages, then the config executes and is logged and shortly after the build completes.

I guess unconfig takes long to check all possible config paths and then compile the found config? But no matter the cause, not a great experience :(

[johannschopplich]

Yeah, I've noticed that one too when tests were still using an execution strategy with npx tsx cli.ts. I have no idea why it takes that long, tho. Especially, since UnoCSS for example loads configs with unconfig much faster. Maybe a misconfiguration on kirbyup's side?

I adapted a lot of code directly from the UnoCSS loading strategy.

Side note: Actually I don't know of a single project that uses the features of a custom kirbyup config. Just for the assessment of the relevance, scope and urgency of the ticket.

[johannschopplich]

Can you confirm loading a kirbyup.config.js is much faster with:

export default {
  // ...
}

instead of:

import { defineConfig } from 'kirbyup'

export default defineConfig({
  // ...
})

…?

Because if so, for a temporary workaround I might just update the README to use export default {} instead.

[jonaskuske]

Confirmed!

And makes sense, Node has to load and run all of these imports just to get the defineConfig:

import 'node:fs';
import 'node:fs/promises';
import 'pathe';
import 'vite';
export { b as build, d as defineConfig, s as serve } from './chunks/index.mjs';
import 'postcss-load-config';
import 'postcss-logical';
import 'postcss-dir-pseudo-class';
import 'consola';
import 'perfect-debounce';
import 'picocolors';
import 'vite-plugin-full-reload';
import 'fs';
import 'path';
import 'module';
import 'crypto';
import 'zlib';
import 'util';
import 'unconfig';
import 'magic-string';
import 'detect-package-manager';