Created attachment 359291 [details]
Safari seems to leaks memory with indexedDB and openCursor(), Chrome is fine, Firefox also has problems
Run the attached test case with the web inspector open, 85 MB will be leaked from one record
This is still a problem in Tech Preview 73
This was previously discovered and reported via the Apple bug reporter
I am not able to reproduce the memory increase when reloading test page in Safari; I think the leak might be fixed by some previous changes like https://bugs.webkit.org/show_bug.cgi?id=193167.
If you still see memory increase, please provide a new test case and we will look into it again.