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heimdalljs

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heimdalljs

Structured instrumentation library

  • 0.2.6
  • latest
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  • npm
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Weekly downloads
360K
decreased by-9.8%
Maintainers
6
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Created

What is heimdalljs?

HeimdallJS is a lightweight performance monitoring library for JavaScript applications. It allows developers to track and measure the performance of their code by creating performance metrics and visualizing them. This can be particularly useful for identifying bottlenecks and optimizing the performance of web applications.

What are heimdalljs's main functionalities?

Creating a Monitor

This feature allows you to create a performance monitor that tracks the execution time of a specific block of code. You start the monitor before the code block and stop it after the code block.

const heimdall = require('heimdalljs');
const monitor = heimdall.start('my-monitor');
// Your code here
monitor.stop();

Tracking Performance Metrics

This feature allows you to track specific performance metrics by starting and stopping named metrics. You can then retrieve and log the statistics for these metrics.

const heimdall = require('heimdalljs');
heimdall.start('my-metric');
// Your code here
heimdall.stop('my-metric');
const stats = heimdall.statsFor('my-metric');
console.log(stats);

Visualizing Performance Data

This feature allows you to visualize the performance data collected by HeimdallJS. You can convert the performance data into a JSON format and log it for further analysis.

const heimdall = require('heimdalljs');
const monitor = heimdall.start('my-monitor');
// Your code here
monitor.stop();
const tree = heimdall.toJSON();
console.log(JSON.stringify(tree, null, 2));

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Package last updated on 16 Aug 2018

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