There are only a few countries (the UK being one) that have put time and effort into ensuring executions are efficient, humane and quick.
In the UKs case it was started in the 1800s, and formalised in a Royal Commission where the panel toured the world witnessing various executions, and concluded that long drop hanging was the method that ticked all boxes.
Meanwhile the US has repeatedly avoided the same due to a lack of interest in expediting executions.
If I was pressed to name the other country that seemed to care, it would be revolutionary France. Which really beat Britain to it.