sciguyryan wrote:It's good to hear the reasons behind this sort of thing, we tend to only catch part of the story.
The main reason is that they tried several times over a period of 5 years

sciguyryan wrote:I assume that if there were any features that Mozilla wanted from newer jemalloc versions that they could cherry pick them anyway, right?
Yeah, we did that several times in the past. The internal design of jemalloc has changed a lot over the years though, and most changes aren't self-contained enough to consider.