Micro lag when scrolling in Tauri macOS version (WKWebView) but not in Safari.

[HugoOlsson]

Hi, I am working on a project that uses a relatively simple layout. The problem is that the application has a very frequent and noticeable micro lag in the macOS version when scrolling. I tried in Chrome (using localhost) and it was completely smooth, so I thought that it was a difference between the rendering engines. However, I have now also tried in Safari using localhost and it is completely smooth there as well. Since WKWebView uses the same engine as Safari, something else must cause this.

I have just recently updated macOS to ensure that I have the latest WKWebView version (19617.1.17.11.9), so the problems should not be because of an outdated version. The Safari version I am using is: ”Version 17.2 (19617.1.17.11.9)”.

May there be a setting in WKWebView to make it handle things the same as Safari? And if yes, can I change that setting in Tauri?

May it be that WKWebView doesn't prioritize to use resources like Safari?

Is there anything else that can affect this? I have optimized the layout, so it should not be heavy to scroll.

[HugoOlsson]

It's kind of like the app is locked in 60 Hz. I use a 120 Hz display so Safari and Chrome renders in 120 Hz. Can there be such limitation in max frame rate for the app?

[xixioba]

I have a similar problem, the app is limited to 60FPS and in the browser I get 120FPS
Adding info.plist has no effect
Below is my Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CADisableMinimumFrameDurationOnPhone</key><true/>
<key>CADisplayLinkMinimumFramesPerSecond</key>
<integer>120</integer>
<key>CADisableMinimumFrameDuration</key><true/>
</dict>
</plist>

[metasmash]

Hello

I don't know if this is related, but have you tried passing a different browser agent to your web view?
ref: #11957