Depends how specific you want "specific" to be I guess? I.e. we have loads of compression algorithms for different kinds of data. Whereas here we are looking at

Depends how specific you want "specific" to be I guess? I.e. we have loads of compression algorithms for different kinds of data. Whereas here we are looking at almost dataset-specific compression (i.e. the only benchmark is how it works for one specific set of data to compress), and there's a sliding scale between the two ends. Similarly, having to contain the decompression code in the measured result size and it being a relevant contribution is something that only applies in some use cases of compression.