NFDB on nostr.land has significantly better performance compared to most relay software. This is partly because it has completely eschewed standard DB structures and has a custom structure built on a KV store, like the designs used by strfry or @jb55's nostrDB. There are some other optimizations that can help about ~100x at times as well. I have explored all sorts of DBs, and anything beyond a KV store sets you up for failure View quoted note →

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Many Nostr projects should have the following safety label required by law. "WARNING: Brain irritant"