Why is posting/submitting slow?

When posting/submitting a message reply, I get a message “Minting proof-of-work for the entity.” The process takes several minutes to complete.

What can I do to speed this up? There’s something about “strength settings”. How do I modify that setting?

It’s part of the system to limit spam, it imposes the computationally-heavy task of making a proof-of-work in order to make sure it becomes prohibitively resource-consuming to post a lot of submissions and comments rapidly.