Slice by 4 bytes

configname: CONFIG_CRC32_SLICEBY4

CRC32 implementation
└─>Slice by 4 bytes
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Calculate checksum 4 bytes at a time with a clever slicing algorithm.
This is a bit slower than slice by 8, but has a smaller 4KiB lookup
table.

Only choose this option if you know what you are doing.