This will degrade performance.
Bad interface design, hardware limitations, and cross-system interaction can also degrade performance of the whole system.
Unfortunately, changing the apparent sector size in firmware can degrade performance.
In addition to the large size of the mail database, the number of documents in a view — particularly the Inbox — can also degrade performance.
Indeed, too many threads will even degrade performance because of the additional context switching overhead.
Such leaks can degrade performance and eventually cause a program to crash.