When the 1Password (chrome) extension is installed and enabled, it seems to have a significant negative effect on Orion's rendering speed. Once the 1Password extension is disabled, rendering speed returns to a more respectable level.

Steps to reproduce:

Open MacOS Activity Monitor to the CPU page and sort by the % CPU column (descending)
Disable all extensions in Orion
Visit https://browserbench.org/Speedometer3.1/ and Start Test
While the test is running, note the absence of a "chrome-extension://..." process
Allow test to complete and note the resulting score. For me this ends up being ~ 18.0.
Enable only the 1Password (chrome) extension in Orion
Refresh the Speedometer3.1 page or open a new tab to https://browserbench.org/Speedometer3.1/, and Start Test
While the test is running, note the presence of a "chrome-extension://..." process that is using high CPU (upwards of 100% CPU on my testing)
Allow test to complete and note the resulting score. For me this ends up being ~ 8.0.

1Password extension disabled:

1Password extension enabled:

Ideally, the resulting Speedometer 3.1 test scores would be within a few tenths of a point with the 1Password extension enabled vs. disabled.

Even a point or two in performance loss might be acceptable with the 1Password extension enabled.

As a point of comparison the Brave browser [Version 1.78.97 Chromium: 136.0.7103.93 (Official Build) (arm64)] achieves a score of 27.6 even with the 1Password (chrome) extension installed.

1Password extension enabled in Brave v1.78.97:

Version 0.99.133-beta (WebKit 621.1.2.111.4) Build date April 21, 2025 MacBook Pro (macOS Sequoia 15.5 build 24F74)

Sequoia (15)