@onerepo/plugin-performance-writer

This is a usable example plugin to demonstrate how to build your own telemetry and performance tracing plugin using the oneRepo plugin API and internal performance entries.

Using a PerformanceObserver, it listens for performance marks and converts them into measurements from onerepo_start_ to onerepo_end_ prefixed entries. On CLI shutdown, the measurements will be written to a file for later operation.

Private by default

oneRepo does not send metrics, telemetry, or any other information anywhere – unless you build that yourself.

Installation

npm

Install via npm

npm install --save-dev @onerepo/plugin-performance-writer

yarn

Install via Yarn

yarn add --dev @onerepo/plugin-performance-writer

pnpm

Install via pnpm

pnpm install --save-dev @onerepo/plugin-performance-writer

Configuration

performanceWriter()

function performanceWriter(opts): PluginObject;

Include the performanceWriter plugin in your oneRepo plugin setup:

onerepo.config.ts

import { performanceWriter } from '@onerepo/plugin-performance-writer';

export default {
  plugins: [performanceWriter()],
};

Parameters

Parameter	Type
opts	Options

Options

type Options = {
  output?: 'temp' | string;
};

Include the performanceWriter plugin in your oneRepo plugin setup:

onerepo.config.ts

import { performanceWriter } from '@onerepo/plugin-performance-writer';

export default {
  plugins: [
    performanceWriter({
      output: '/tmp/onerepo-perf-out',
    }),
  ],
};

Properties

output?

optional output: "temp" | string;

Whether or not to measure performance marks. Adds minimal overhead. Disable if you’d prefer to make your own measurements.

• temp: Writes a JSON dump of the measurement entries to a temporary file. The filepath will be returned from the run() call of your application.
• string: Will do the same as 'temp', but use this string as the filepath.
• Default: true