THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
If you merge a performance critical change (e.g. code paths executed per record, state entry etc) to master, you should verify that it did not cause a regression comparing to the previous state of the master. There is an existing performance test suite which periodically runs on the master branch. You can check the timeline of its results after some time in this UI. If you are unsure about your changes and want to check the regression before merging, contact a PMC to submit a benchmark request and check results in the comparison UI.
Check also more details in the mailing list announcement.