High CPU usage (especially on Safari)

[abulte]

When I visit http://data.gouv.fr/fr/?flag=recherche on Safari Mac OS Catalina, the browser starts to consume CPU like crazy, even without clicking in the search box.

When I remove the flag, the CPU is fine (around 2%).

On Chrome it also happens but a little less (around 60% CPU) and it goes away after about 10 seconds (unlike on Safari). Without the flag there's no noticeable CPU spike.

[abulte]

According to the Safari dev console, the loadCards fn seems to be running forever.