rollup-timer

0.3.4 verified Mon Apr 27 auth: no javascript maintenance

Times Rollup plugins by monkey-patching plugin API functions. Version 0.3.4 is stable with no recent updates; it works with Rollup <1 and is incompatible with rollup-plugin-commonjs. Differentiator: simple drop-in timing for Rollup builds, with support for both promise and stream-based rollup invocations.

Common errors

error TypeError: (0 , _rollupTimer2.default) is not a function ↓

cause Using named import 'time' instead of default import.

fix

Use 'import time from 'rollup-timer''

error time is not a function ↓

cause Incorrectly importing as named export or using CommonJS without .default.

fix

Use 'const time = require('rollup-timer').default'

Warnings

gotcha rollup-timer is incompatible with rollup-plugin-commonjs; timings for that plugin will be incomplete. ↓

fix Avoid using rollup-timer with rollup-plugin-commonjs, or expect inaccurate timing data.

deprecated The package monkey-patches internal Rollup API and may break with future Rollup versions. Last updated for Rollup 0.x; not tested with Rollup 1+. ↓

fix Consider using Rollup's built-in timing support or other profiling tools.

gotcha Plugin 'name' property required for readable reports; if a plugin lacks name, the report falls back to numeric index. ↓

fix Ensure plugins provide a 'name' property; submit PRs to plugin authors if missing.

Install

npm install rollup-timer

yarn add rollup-timer

pnpm add rollup-timer

Imports

time
wrong
```
const time = require('rollup-timer')
```
correct
```
import time from 'rollup-timer'
```
Default export is the time() function; CommonJS require returns the module object, not the function directly.

RollupTimer

wrong

import RollupTimer from 'rollup-timer'

correct

import { RollupTimer } from 'rollup-timer'

RollupTimer is a named export, not default.

time (named import)
wrong
```
import { time } from 'rollup-timer'
```
correct
```
import * as timer from 'rollup-timer'; timer.default()
```
There is no named export 'time'; using named import incorrectly yields undefined.

Quickstart

Monkey-patches Rollup to time plugin execution and outputs timing information.

const rollup = require('rollup');
const time = require('rollup-timer').default;
time(rollup);
const options = { input: 'src/index.js', plugins: [] };
rollup.rollup(options).then(bundle => bundle.write({ file: 'dist/bundle.js' })).catch(err => console.error(err));