Prexo:
Sorry for the confusion - yes I meant "performance" as in speed.And my focus is on NOR EEPROMs like the ones used in iPhone firmware and computer BIOSes.
From what I gather then - the read speed of these NOR EEPROMs will remain constant all the way until it fails.
And from what I read (and what you posted) it doesn't seem any of these NOR EEPROMs used for firmware/BIOS functions - even have ECC hardware capabilities - so there definitely is no speed degradation over time (and if it fails - it just fails / plain and simple).
Yep, I agree.
It works or it fails.
It never slow's down.
chuck.