Page diagnostics for SharePoint

I do a fair bit of work speaking on and helping others troubleshoot SharePoint Online (SPO) performance issues, and in this tool's current release (v2.0.1), the Page Diagnostics Extension addresses many of the gaps that were present in v1.x of the extension. The tool is no longer limited to classic mode pages (it handles modern pages just fine), and this version provides prominent links to additional resources which help to educate and explain many of the factors influencing SPO page performa... Show more

As of this writing, this extension does not work with Modern SharePoint pages, only Classic pages. It notifies you if you run it on a Modern page that it may produce unreliable results, so be aware.

I also found this page would break other sites when enabled. It appears to interfere with Ajax queries which will cause some page elements to not load until the page is manually refreshed.

It's good tools, but is always active and flood console box with useless log ... please add disable button or delete the useless log : "Copying network performance info... contentScript.js:52 CustomEvent {isTrusted: false, detail: {…}, type: "SP-YSLOW-WINDOW-PERF", target: document, currentTarget: document, …}"

This app really helped me troubleshoot a performance issue with my SharePoint Online site. The only problem is though for what ever reason it broke some other sites when it was enabled. I'm not sure why it does this but luckily Chrome makes it easy to enable when I need to troubleshoot and disable when I'm not using it