Automated performance tests

[ayumi]

It would be really helpful to have automated tests measuring performance for common user profiles and tasks. We could run the tests with CI on every PR and release, and they would help us find performance issues and prevent regressions.

Example test ideas:

• Startup
• Use tabs (Open, Close, Switch)
• Browse websites
• Bookmark websites
• Bookmark manager
• History manager

Example user profiles:

• Fresh
• 300 tabs
• 1000 bookmarks

#9389
#9826

[lukemulks]

Suggestion:

• 1 run with default shields up.
• 1 run with shields down.

^we may be able to use this for marketing, by messaging as "Brave Shields increase perf by x%"
(Less emphasis on other browsers, more emphasis on how our features enhance our own performance.

I am probably posting this on the wrong issue, but wanted to add since you had listed test scenarios.

[diracdeltas]

Duplicate of #1252

[bsclifton]

Closing as wontfix. If we did address this, we'd want to do so in Brave Core

[bsclifton]

update: opened issue in brave-core: brave/brave-browser#814