@a1ba No, you should just use glibc malloc.

jemalloc apparently is faster than glibc for memory-wasting multithreaded software (RAM is just as wasted if you fill it up to OOM than not using it), but glibc seems to be faster and use less memory if you aren't using all the memory and allow for other software.

jemalloc seems to be used to compensate for poor programming and also since it has a weak license (as the power to take freedom must be granted).