How does Sliding Token make the backend less performant?

[zzhangJ]

Quote from the documentation about Sliding tokens:

"...less secure and, in the case that the blacklist app is being used, less performant."

Later it says:

"...if you are using the blacklist app, Simple JWT will validate all sliding tokens against the blacklist for each authenticated request. This will reduce the performance of authenticated API views."

What does it mean it will validate all sliding tokens? I thought the view only needs to validate the sliding token that is in the request against the blacklist data table, and the impact on performance would be the same whether it is a sliding token or a fresh token.

Correct me if I'm wrong.

[Andrew-Chen-Wang]

Sliding token is a little iffy and discussed in #154 The problem is that a sliding token is continuously validated with a "weird auth" mechanism that can cause it to be less performant. Would advise reading the thread.