bug: Appium Inspector loads some app screens slowly/not at all

[DHutchings-AG]

Do I have the most recent component updates?

• I use the most recent available driver/plugin and server versions

Is the component officially supported by the Appium team?

• I have verified the component repository is present under the Appium organization in GitHub

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

While using the Appium Inspector GUI app (latest version at time of writing this), some pages of an iOS application under test takes 2+ minutes to refresh and display on the GUI. Sometimes they do not load at all and the GUI leaves us on the previously loaded page. Note that this was not seen prior to the screens being converted to use SwiftUI, but other screens in the app which also use SwiftUI do not exhibit this issue.

Expected Behavior

Inspector refreshes faster without chance of failing to load the screen.

Minimal Reproducible Example

Appium-log-May7.txt
WDA-log-May7.txt

Attached logs that we collected after refreshing one of the problematic screens, in which it took ~3min to display it. Most screens on the app load almost instantly with the exception of two. This was NOT an issue prior to these screens getting migrated to use SwiftUI.

Environment

Operating system: MAC OS

• Appium server version (output of appium --version): 2.1.3
• Appium driver(s) and their version(s):
• uiautomator2@2.12.6 (automationName 'UiAutomator2')
• xcuitest@4.35.0 (automationName 'XCUITest')
• Appium plugin(s) and their version(s): No plugins have been installed.
• Node.js version (output of node --version): v20.8.0
• npm version (output of npm --version): 10.1.0
• Last component(s) version which did not exhibit the problem: it’s the same as above
• Platform and version under test: iOS with os 16.0
• Real device or emulator/simulator: Real Device

Link to Appium Logs

https://gist.github.com/DHutchings-AG/3695dafb6ed0debd23d823e3dea8248c

Further Information

This issue has been seen across multiple devices + machines, all of which are running on environments similar to the one described above.

[mykola-mokhnach]

The slowness has nothing to do with inspector. It needs to load the page screenshot and the page source in order to show anything and the latter could sometimes be slow. Read https://github.com/appium/appium-xcuitest-driver/blob/master/docs/guides/wda-slowness.md for more details.