NVIDIA / NVIDIA/CUDALibrarySamples

Dictionary Compression

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#355 5 comments 0 reactions 1 assignee View on GitHub

@naveenaero is already working on this.

Since Apr 29, 2026.

nvCOMP
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Description

I mention it here https://github.com/NVIDIA/CUDALibrarySamples/issues/356

But dictionary compression can be very helpful on columns with low cardinality and can even be used on floats if the cardiniality is sufficiently low. Back in the BlazingDB we would quite often use dictionary combined with other schemes (e.g. rle or bitpacking) to heavily compress some of the columns,.

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