[khalladay]

At least with the real time applications that I have experience with, this is often mitigated with custom memory allocators which pre-allocate large contiguous blocks before performance critical sections and then parcels out segments of those blocks at runtime.

[pjmlp]

Which is also possible in GC enabled languages, so one can make use of a GC and then make use of similar technics for the code path that really requires them.

For example in real time JVMs