KV cache quant benchmarks: q5 & q6 are underrated, q8/q4 is bad, TCQ has a niche
Here's my article with **38 quant pairs** thoroughly benchmarked in KLD with **3 different Qwen 3.6 27B configs**: Q5\_K\_S + 64k context, IQ4\_XS + 64k context, IQ4\_XS + 128k context. This allows us to track not only how cache quantizations affects the precision in a vacuum, but also how it interacts with noise from the model itself. All benchmarks were done using my [BeeLlama.cpp](https://github.com/Anbeeld/beellama.cpp) fork, allowing to include a number of quant types that are not present in mainline llama.cpp: vanilla TurboQuant, TCQ 3-bit/2-bit, and q6\_0. [https://anbeeld.com/articl...