# Digging into regressions

DevFeed: [Digging into regressions](<https://devfeed.tech/articles/digging-into-regressions-20263.md>)

Original publisher: [Read original article](<https://elvis314.wordpress.com/2019/08/23/digging-into-regressions/>)

Author: elvis314

Published: 2019-08-23T20:53:47Z

Content type: opinion

Language: en

Sources: [Mozilla Automation](<https://devfeed.tech/sources/mozilla-automation.md>)

Topics: [bug](<https://devfeed.tech/topics/bug.md>), [data](<https://devfeed.tech/topics/data.md>), [Mozilla](<https://devfeed.tech/topics/mozilla.md>), [monitor](<https://devfeed.tech/topics/monitor.md>), [Web platform](<https://devfeed.tech/topics/web-platform.md>)

Tags: [bug](<https://devfeed.tech/tags/bug.md>), [data](<https://devfeed.tech/tags/data.md>), [monitor](<https://devfeed.tech/tags/monitor.md>), [mozilla](<https://devfeed.tech/tags/mozilla.md>), [platform](<https://devfeed.tech/tags/platform.md>), [regression](<https://devfeed.tech/tags/regression.md>), [testdev](<https://devfeed.tech/tags/testdev.md>), [tests](<https://devfeed.tech/tags/tests.md>), [web](<https://devfeed.tech/tags/web.md>)

## AI overview

The article examines how Mozilla tracks regressions detected by builds and tests after patches land on autoland. It proposes distinguishing unique regressions and product fixes, while considering data accuracy, backouts, and the potential impact of changing or disabling test jobs.

## Source excerpt

Whenever a patch is landed on autoland, it will run many builds and tests to make sure there are no regressions. Unfortunately many times we find a regression and 99% of the time backout the changes so they can be ... Continue reading ->