The architecture independent versions aside, I'm afraid a lot of people will take from this comment the BSD version is "cleaner" and therefore "better." While it is cleaner, the BSD version requires very many more jumps (4 times more if I remember correctly, I haven't looked at glibc in quite awhile).
The glibc version is written in such a way to minimize the jumps in the assembly and therefore produce faster code. Besides reading 4 bytes at a time, it does some clever (and very nontrivial) "magic." But again, all to reduce the number of jumps.
The glibc version is written in such a way to minimize the jumps in the assembly and therefore produce faster code. Besides reading 4 bytes at a time, it does some clever (and very nontrivial) "magic." But again, all to reduce the number of jumps.