Wear levelling FATFS performance really slow even for reading?

[doglike]

Important hint:
You have to make sure that there is always only one process/task that is accessing LittleFs at the same time.
Otherwise you will get error-codes, malfunction or even a complete crash.

SPIFFS and FFat are more robust in that cases.

[vonnieda]

Yes - personally I use ESP-IDF's VFS layer so I can use POSIX style file calls, and on each of those wrappers I've added a mutex check.

Jason