Often I run some tests in browser, I see a top level case turn red, I click the ⏵ to expand and then ... my browser freezes for several minutes. Sometimes I just have to give up because I don't know if it will ever finish.

Any idea how we can fix this? Could we virtualize the expansion (yikes!) (only generate enough elements to fit on the screen, scroll through them). That idea is not great because then you can't search the results. At the same time, it taking a really long time to expand is also problematic so wondering about solutions.