See, you were asking for that audio fingerprinting feature on ModArchive. This feature is pretty much the biggest reason why the scanning process is so slow.
didn't freeze at some modules (like alivepc_version.mod)
That file is about 43723 minutes long (mostly due to silence at the end of course); computing the audio fingerprint of 40000 minutes of silence takes a while. Maybe the fingerprinting should be limited to the first few minutes of a module.