Performance issue

[vasal635]

Current behavior

I checked cypress performance on version 9.7.0 and this is slower then 8.1.0

MacOs Monterey 12.4 (21F79)
MacBook Pro (16-inch, 2019)
Processor 2,6 GHz 6-Core Intel Core i7
Memory 16 GB 2667 MHz DDR4

I used the same test for 2 versions.

In version 9.7.0 it's taking average 130 seconds per my test.

In version 8.1.0 it's taking average 70 seconds per my test.

Desired behavior

I'm waiting, that new version will have better performance, then old one.

Also I tried to install new versions for several times -> but performance was bad.

Test code to reproduce

1. Install version 8.1.0
   npm install --save-dev [email protected]

2. Run test and make screenshot of time

3. Install version 9.7.0
   npm install --save-dev [email protected]

4. Run test and make screenshot of time

5. Notice, that new version is slower, then old one

Cypress Version

9.7.0

Other

No response

[bbartizek]

I noticed similar results. We have a test suite in one of our CI pipelines that averages 12m 10s over the last 30 days on 8.1.0. I recently upgraded to 9.7.0 in order to take advantage of the new experimental session() feature, and the same suite with only minor changes for the session handling went to ~25 minutes. I thought it was due to the new session behavior compared to inheriting existing sessions between tests, but that seemed like a huge hit for just fetching browser state from cache. I think my results might be impacted in the same way as vasal365.

Edit: Median test duration went from 3 seconds on 8.1.0 to 9 seconds on 9.7.0

[romankhomitskyi]

Same here, tests are really slow on 9.5.0
It would be great if this issue got fixed before 10 release

[darrinmn9]

possibly related to #18564 ?

[ZachJW34]

As @darrinmn9 pointed out, we have an existing issue for performance that matches a subset of the versions you listed. Can you try testing your application with version 8.3.0 and 8.6.0 and see if the slowdown is caused from that upgrade? Also, a reproduction would be very helpful.

If there are no performance problems for versions after 8.6, I'm going to close this as a duplicate of #18564.

@bbartizek If your issues are due to the new experimental session support, can you open a new issue? Depending on how you refactored your tests there might be cause for the slowdown. A reproduction of what you are seeing would be helpful, otherwise it is hard to pinpoint what might be causing the slowdowns.

[vasal635]

Hi @ZachJW34

Yes, this is duplicate of #18564

I have a lot of cy.visit() in this tests.

I also tried 10.0.1

But 8.1.0 still has better performance

Hope, that you will fix it.

[mjhenkes]

Closing as duplicate of #18564