Don't want to crash the hires party, but here are some test results with v1.4.2 binaries floating around here.
As always, CPU is Intel Core i7-8700 CPU @ 3.20GHz, test corpus is mostly classic rock CDDA material).
FLAC Binary: xiph-142\flac.exe (299520 bytes)
FLAC Option: -7
- Average time = 27.940 seconds (5 rounds), Encoding speed = 386.97x
- FLAC size = 1.167.014.374 bytes (= 61,188% of WAV size, ~863 kbps)
FLAC Binary: flac142-x64-gcc1220-Ofast+manyflags-noasm-wombat_2022-10-23.exe (665600 bytes)
FLAC Option: -7
- Average time = 22.560 seconds (5 rounds), Encoding speed = 479.25x
- FLAC size = 1.167.014.374 bytes (= 61,188% of WAV size, ~863 kbps)
FLAC Binary: flac142-x64-gcc1220-Ofast+manyflags-wombat_2022-10-23.exe (737280 bytes)
FLAC Option: -7
- Average time = 25.519 seconds (5 rounds), Encoding speed = 423.68x
- FLAC size = 1.167.014.374 bytes (= 61,188% of WAV size, ~863 kbps)
FLAC Binary: flac142-x64-Clang1503-Ofast-wombat_2022-10-23.exe (613376 bytes)
FLAC Option: -7
- Average time = 24.699 seconds (5 rounds), Encoding speed = 437.75x
- FLAC size = 1.167.014.372 bytes (= 61,188% of WAV size, ~863 kbps)
So here wombat's gcc build w/noasm is the fastest, on-par with his 141-fastmath build from 2022-10-14.