I tried all my best to get a better performance out from the (optional) AVNET eMMC module,
compared to using an SD card...
The AVNET eMMC module is so SLOW on write!
I get (on command line test and even measuring with Python code):
WR speed: 4.2 MB/s (best as 5.7 MB/s) - REDICOLOUS SLOW!
RD speed: 18.75 MB/s
eMMC is way SLOWER as any SD card used!
WR speed: 20..26 MB/s
RD speed: 50 MB/s
Why is AVNET eMMC with an 8bit interface (compared to 4bit on SD card) so slow??