p4ddec32 about turbopfor-integer-compression HOT 1 CLOSED

Does p4ddec32 use the same block size as p4ddec128v32?

Yes.

however, the compressed size seems to be the same even though 128 should compress better

Allmost always if you have an increasing sequence, however there can be exceptions with a marginal difference.
The "d" functions (like p4ddec32) are normally used for increasing sequences, the "d1" for strictly increasing
otherwise it's better to use the "z" (delta zigzag) functions.

from turbopfor-integer-compression.