[leecarraher]

This is a pretty clickbaity title in my opinion. Bubble sort in lower level language X is going to be slower than quick sort in high level language Y. And bubblesort in high level language is going to be faster than merge sort for small data sets on low level language X. If you aren't comparing the same underlying routine, or data application, I don't think any conclusion should be made. Comparisons between languages is exactly why asymptomatic analysis was devised. Extract the process from the low level and hardware characteristics, and get the overall complexity growth. But this doesn't work the other way around. You can't compare different routines in different languages and expect big oh to be comparable.

[brundolf]

The problem is that a language isn't just its speed, a language is a UX. If that UX makes it easier to accidentally make performance mistakes, then practically speaking, things written in that language are slower than they would be otherwise.

Edit: The original title "Why Python is faster than C++" is much more clickbaity than the editorialized ("When Python is faster than C++")