fre: Infinite loop (in scheduler?)

(You said in #84 you thought this problem was fixed, but I still have this issue with version 1.8.7 - I’m opening a separate issue to avoid getting sidetracked in other issues.)

I’ve created a preliminary benchmark, which sometimes causes Chrome to lock up:

The only way out is to kill the browser tab via Chrome’s task manager.

To recreate the problem, be sure to build the fre benchmark with npm run build-prod - for some reason, the problem doesn’t seem to appear with npm run build-dev, not sure (?)

Click on the button to create 10,000 rows - then click repeatedly on the “update” and “swap” buttons, which seem most likely to trigger the problem.