I couldn't resist doing some speed tests with my favourite "-7" setting.
I'm still using the following setup with my line-up of 40 CDDA-WAVs (3 hours of playing time):
CPU: Intel Core i7-8700 CPU @ 3.20GHz
RAM: 2 x 16 GB DDR4-2666 (1333 MHz) SK-Hynix
HDD: Samsung SSD 860 EVO 500GB
My fastest v1.4.2 build (reference):
flac142-x64-gcc1220-Ofast+manyflags-noasm-wombat_2022-10-23.exe (665600 bytes)
-> Average time = 22.635 seconds (5 rounds), Encoding speed = 477.66x
xiph-143\flac.exe (302592 bytes)
-> Average time = 22.715 seconds (5 rounds), Encoding speed = 475.99x
flac143-x64-gcc1310-O3-noasm-wombat_2023-06-23.exe (705024 bytes)
-> Average time = 21.904 seconds (5 rounds), Encoding speed = 493.61x
flac143-x64-gcc1310-O3-wombat_2023-06-23.exe (814592 bytes) <== FASTEST BUILD
-> Average time = 21.334 seconds (5 rounds), Encoding speed = 506.80x
flac143-avx2-john33.exe (1310602 bytes)
-> Average time = 22.167 seconds (5 rounds), Encoding speed = 487.76x
flac143-fa32-wombat.exe (816640 bytes)
-> Average time = 22.355 seconds (5 rounds), Encoding speed = 483.65x
So the build from "down under" with asm option is:
a) the fastest encoder in my setup
b) 6.5% faster than the official xiph build
c) 6.1% faster than my fastest v1.4.2 build
However, it remains a mystery to me why wombat's fastest 1.4.2 was "noasm", while the fastest 1.4.3 was "asm"...