What is the highest WavPack compression setting that does not slow down decoding speed? The way I am reading the documentation, both -h and -hh will slow down decoding time.
As you compress more, the file will take more time to decode. You can easily do your own decoding speed test to decide what is acceptable for you (using foobar2000 for example).
I find that the gains beyond fast mode are not worth the added decoding complexity.
Note that the -x(n) switch does not incur a decoding speed penalty.