Reusing 5-independent hash functions for linear probing
One potential issue is when reading from a hash table, the elements should not be read in the order of the slots if all hash tables use the same hash function. This is because those elements, in that order, can cause the insert procedure on a smaller hash table with the same hash function to go quadratic, assuming that the max fill factor is over $1/2$. See:


https://issues.cloudera.org/browse/IMPALA-2653
https://github.com/rust-lang/rust/issues/36481