Merge "Switch to purge all unused memory to kernel."

    // region shared with the child process we reduce the number of pages that

    // transition to the private-dirty state when malloc adjusts the meta-data

    // on each of the pages it is managing after the fork.

    if (mallopt(M_PURGE_ALL, 0) != 1) {

      mallopt(M_PURGE, 0);

    }

  }

  pid_t pid = fork();