Issue Summary

Viewing a page in Confluence New Editor that contains a PDF in a View PDF Macro causes the CPU to Spike (confirmed in macOS Mojave and Catalina)

The service name is FirefoxCP Web Content

Environment

• Firefox Quantum 69
• Chrome (including latest stable version - 77.0.3865.90)
• macOS 10.14 and 10.15
• New Editor

Steps to Reproduce

1. Create a page using the new editor
2. Attach a PDF file to the page.
3. Display the PDF using the PDF macro. Save.
4. Visit the page, and note in Activity Monitor the CPU.

Expected Results

Tested against the old editor, where my CPU spikes up to 30-40% but never higher than 100%.

Actual Results

Caused a spike of up to 114% in my environment, and up to 250% in others.

Notes

In Chrome, the CPU also has a spike (around 60% to 80% of CPU usage) in the latest stable version (77.0.3865.90).

Workaround

Use an alternative browser.