[k2so]

A neat trick in Vespa (vectors DB among other things) documentation is to use hex representation of vectors after converting them to binary.

This trick can be used to reduce your payload sizes. In Vespa, they support this format which is particularly useful when the same vectors are referenced multiple times in a document. For ColBERT or ColPaLi like cases (where you have many embedding vectors), this can reduce the size of the vectors stored on disk massively.

https://docs.vespa.ai/en/reference/document-json-format.html...

Not sure why this is not more commonly adopted though