Canadian Politics Today

https://www.cnn.com/2015/02/13/us/gallery/long-jury-selection/index.html
The US system allows lawyers to grill potential jurors to look for bias they don't like. In the Canada system there are only peremptory challenges with some 'with cause' when a lawyer happens to know something about the juror. It is more efficient and it is not clear it produces worse juries than the US system.

Lawyers in Canada can excersise their peremptory challenges at will. The numbers of those vary from 12 to 20. What is important is to have a cross sectional jury pool to begin with.