CRC32C is not that cheap, even with hardware acceleration. Postgres uses CRC32C for the WAL an it definitely shows up in profiles, despite HW acceleration. And

CRC32C is not that cheap, even with hardware acceleration. Postgres uses CRC32C for the WAL an it definitely shows up in profiles, despite HW acceleration. And that's at a far lower throughput than you can have with e.g. sequential scans. Which is why postgres chose a different checksum (FNV) for data checksums...