performance audit varies compared to lighthouse tool from webdev tool

[omkar-hub]

Describe the bug
A clear and concise description of what the bug is.

Performance audit varies compared to lighthouse tool from webdev tool of chrome browser

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://web.dev/measure/'
2. add site 'https://landing.google.com/sre/' for audit
3. Click on Run Audit
4. It gives ~47 % Performance
   Compare with Chrome webdeve tool audit
5. Open site in Chrome browser
6. Go to webdev tool
7. Go to lighthouse
8. Choose performance - desktop
9. Run audit
10. It gives ~99 % performance

Expected behavior
A clear and concise description of what you expected to happen.
The Both places 1. web.dev/measure and 2. lighthouse audit from chrome browser should give same result.

sre-performance.pdf

Screenshots
If applicable, add screenshots to help explain your problem.

[robdodson]

This is possibly occurring because the settings are different. It's a bit hard to see but at the bottom of the page we state that web.dev will run with a simulated mobile device on a 3g connection with 4x CPU slowdown.

Also web.dev will be testing your app from the us-central datacenter, so you may get different results depending on if your app is on a CDN or not.

[omkar-hub]

Got it Thank you Rob. This has cleared the things.

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