What I meant about facebook&#x27;s advocacy is that they have published lots of high profile blogs and whatnot about applications of jemalloc which have contributed greatly to its renown relative to tcmalloc, and I think it&#x27;s fair to say that jemalloc versions 2, 3, and 4 have been largely underwritten by the Big Thumb.<p>And the other side of what I was trying to say is that for Google it&#x27;s largely an issue of personality.  tcmalloc is Google&#x27;s malloc.  JE works for Facebook.  If JE worked at Google I&#x27;m sure Google would just use jemalloc.