Of course it's a bit of an apples to oranges comparison.

An interesting question about CRCs is whether you can implement them efficiently. CRC32 is possible with some help from the CPU (CLMUL as mentioned, or complete instructions for specific polynomials, like crc32c); eg. on Haswell you get to 14-16 GB/s with a CLMUL approach on CRC32. That's obviously much faster than the hashes I mentioned. With the zlib implementation, on the other hand, you only get about one GB/s and there it's really close to B2b already.

Table-based approaches (classic zlib implementation, or slice-by-n, which needs n-times as many tables) would not work well with longer polynomials; the tables would outgrow L1/L2 cache sizes rather quickly. I'd have to think a bit about the tableless CLMUL approach.