To whom it may concern:
On my quest to find a setting for v1.4.1 that rivals my favourite encoding setup (v1.3.3 with -7 = my sweet spot for encoding time and compressed file size), I found these settings for v1.4.1.
The goal was to achieve the same (or better) encoding speed with better compression.
Reference:
FLAC Binary: flac133_case.exe
FLAC Option: -7
Average time = 22.682 seconds (5 rounds), Encoding speed = 476.67x
FLAC file size = 1.168.025.916 Bytes (= 61,241% of WAV size)
For my timings I only used Case's Haswell build, since this was the fastest on my computer.
I haven't varied the windowing functions, because frankly I have little idea what I'm going to do there...
a) FLAC Option: -l11 -b4096 -m -r6 -A subdivide_tukey(2)
Average time = 22.927 seconds (3 rounds), Encoding speed = 471.58x <= worse encoding speed: 477x -> 472x
FLAC file size = 1.167.741.823 Bytes (= 61,226% of WAV size) <= better compression: 0.015 percent points
b) FLAC Option: -l11 -b4096 -m -r5 -A subdivide_tukey(2)
Average time = 22.134 seconds (5 rounds), Encoding speed = 488.48x <= better encoding speed: 477x -> 488x
FLAC file size = 1.167.807.739 Bytes (= 61,229% of WAV size) <= better compression: 0.012 percent points
c) FLAC Option: -l11 -b3072 -m -r5 -A subdivide_tukey(2)
Average time = 21.051 seconds (5 rounds), Encoding speed = 513.62x <= better encoding speed: 477x -> 514x
FLAC file size = 1.167.708.945 Bytes (= 61,224% of WAV size) <= better compression: 0.017 percent points
d) FLAC Option: -l11 -b3584 -m -r5 -A subdivide_tukey(2)
Average time = 20.729 seconds (3 rounds), Encoding speed = 521.58x <= best encoding speed: 477x -> 522x
FLAC file size = 1.167.755.713 Bytes (= 61,227% of WAV size) <= better compression: 0.014 percent points
e) FLAC Option: -l11 -b3328 -m -r5 -A subdivide_tukey(2)
Average time = 20.866 seconds (3 rounds), Encoding speed = 518.16x <= better encoding speed: 477x -> 518x
FLAC file size = 1.167.700.585 Bytes (= 61,224% of WAV size) <= better compression: 0.017 percent points
So it's basically -l11 and -r5 with variations of block size between 4KB and 3KB.
I also tested these settings with another list of WAV files (some 3 hrs of playing time, mostly rock music) and the ranking of the results were the same.
So it's going to be either d) (block size = 0x0E00) or e) (blocksize = 0x0D00) for me.