# Ember.instrumentation

**URL:** https://discuss.emberjs.com/t/ember-instrumentation/15234
**Category:** Performance
**Created:** [August 3, 2018, 5:02pm UTC](https://discuss.emberjs.com/t/ember-instrumentation/15234 "2018-08-03T17:02:36Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![ultimatemonty](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/ultimatemonty/32/13849_2.png) [@ultimatemonty](https://discuss.emberjs.com/u/ultimatemonty)
#### Post date: [August 3, 2018, 5:02pm UTC](https://discuss.emberjs.com/t/ember-instrumentation/15234/1 "2018-08-03T17:02:36Z")

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Is there any good documentation around the events that can be subscribed to via [Ember.Instrumentation - 2.15 - Ember API Documentation](https://www.emberjs.com/api/ember/2.15/classes/Ember.Instrumentation) ?

We’re looking to measure framework boot time vs. app boot time. Or roughly how long it takes from Application.init → Application.ready() and then from Application.ready() → app is rendered and interactive.

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### Author: ![elwayman02](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.emberjs.com/elwayman02/32/11344_2.png) [@elwayman02](https://discuss.emberjs.com/u/elwayman02)
#### Post date: [January 29, 2019, 11:55pm UTC](https://discuss.emberjs.com/t/ember-instrumentation/15234/2 "2019-01-29T23:55:09Z")

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I published an addon specifically to solve this measurement problem:

> **[GitHub - elwayman02/ember-interactivity: Latency Tracking for Ember Applications](https://github.com/elwayman02/ember-interactivity)**
>
> Latency Tracking for Ember Applications. Contribute to elwayman02/ember-interactivity development by creating an account on GitHub.

I don’t recommend using the hooks in Ember.Instrumentation in production, as they can add overhead via the render-blocking code you need to build callbacks around the render events.