FWIW: all allocators tested are user-space allocators - and moreover, to achieve this kind of performance they MUST be user-space (as user-kernel switch with al

FWIW: all allocators tested are user-space allocators - and moreover, to achieve this kind of performance they MUST be user-space (as user-kernel switch with all the checks is waaaay too expensive). And as soon as we're user-space - it IS possible to compete with whatever-allocator-is-provided-by-your-user-space-lib (not that it makes sense for 99.9% of the projects, but it MIGHT be possible to write an allocator which is better-than-<whatever-allocator-we-pick>). In addition, it IS possible to write allocators MUCH-better-suited-for-specific-apps (see, for example, talk on Arena Allocators on CPPCON17 by John Lakos from Bloomberg).