Also, this method really works. There are some sacrifices in quality (we do s2s), but probably in plain classification it will work just perfectly.
Also quantization used together with factorization can really reduce your model size ~10x, which is nice!
An xsmall_q model here - Quality Benchmarks · snakers4/silero-models Wiki (github.com) 1 - is 30x smaller that large models and it is created by a combination of quantization / minification / factorization.