I read that using the child selector (>) in css is faster than the descendant selector (). For example: p > em as opposed to p em.
It seems to me that the majority of code I see in the wild does not take advantage of this.
I understand that certain circumstances would merit the use of one or the other, but in general, Should I be striving to take advantage of the child selector whenever possible? Or should I follow what seems to be convention and rely mostly on the descendent selector?