1881796 - Visual glitch on the devtools network timing

Status: NEW

(DevTools :: Netmonitor, defect, P2)

Description

[esroyo]

Attachment: firefox-devtools-network-server-timing-glitch.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Steps to reproduce:

Visit a website a couple of times so that the request is cached on the client.

--

Probably reproducible by visiting: https://esroyo.github.io/systemjs.sh-examples/dist/index.html

Attached screenshot corresponds to the 5th request GET https://systemjs.sh/vue.

Actual results:

The server-timing response headers are displayed out of position in the details of the request.

Expected results:

Either they are ignored, or take the right space.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'DevTools::Netmonitor' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Alice0775 White]

Str:

1. Open Inspector - Network
2. Open https://esroyo.github.io/systemjs.sh-examples/dist/index.html
3. Click on GET https://systemjs.sh/vue on the network
4. Click on Timings tab
   If not reproduced, proceed to the next step:
5. Press F5 key to reload
6. Click on GET https://systemjs.sh/vue on the network

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=fdee7bc5d06a921a63a9cd74c65c8fbd96d18cf4&tochange=94a07cbcc6f95874dd7b02220f0f7229b60c076b

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

:bomsy, since you are the author of the regressor, bug 1353798, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 4

[Bob Hood [:bhood]]

Honza, can you please apply Priority/Severity settings to this report when you get a chance? It will help with release management's triage.

Comment 5

[Jan Honza Odvarko [:Honza] (always need-info? me)]

Adding flag to triage this at our weekly meeting.

I can reproduce the problem on my machine (Win11) easily by following STRs in comment #2

Bomsy, the regression points to bug 1353798. Is that the culprit?

Comment 6

[Hubert Boma Manilla (:bomsy)]

Thanks .. looking into this.

Comment 7

[Hubert Boma Manilla (:bomsy)]

Note: This happens when cached is disabled.

Comment 8

[Hubert Boma Manilla (:bomsy)]

Attachment: WIP: Bug 1881796 - [devtools] Fix timing metric when loading from the browser cache