How is that even remotely relevant? Number of polling places and effort scales linearly with population size.

But it’s not always equal. http://amp.kansas.com/news/business/article220286260.html

Population of Canada: 37 million.

Population of California: 39 million.

Another possibility is that the vote need not be finished in a single night.

It's not finished in a single night everywhere in US, either.

https://www.seattletimes.com/seattle-news/why-is-ballot-coun...