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#1646 CRC is great feature
It wouild be useful if multiple 7-Zip CRC dialog boxes are open, if the instances of 7-Zip could talk to each other and turn the CRC code green (or red) if they all match.
It would also be useful to clearly indicate the "Directory: C:\MyDirectory" somewhere in the information at the top, just in case you are trying to work with multiple CRC dialog boxes open at the same time and trying to relate the specific file with that CRC (as they might have all the same Filename)
Also it is not possible to make a copy text seleciton of the hash and it would probably look better with a bit of a table presentation.
Not sure on the BLAKE2sp checksum is, appears to be some attempt to make a well performing multi-core hash/checksum, when the main issue is not hash computation speed but I/O throughput of the source data, even with multiple RAID1 interleved PCI-e SSD a single modern CPU can outperform the I/O bus when computing a hash. Seems an exotic feature that very few users will benefit from.
While MD5 is still widely used and published on websites but not even listed in the output.
7-Zip implements BLAKE2sp for rar5 format.