You really don't want library code providing or dictating malloc behavior, that's how things like OpenSSL and Heartbleed end up happening. It may be slower, but

You really don't want library code providing or dictating malloc behavior, that's how things like OpenSSL and Heartbleed end up happening. It may be slower, but dealing with the politics of a particular malloc can be uglier than just making your code work well enough most of the time.