@seiichiro0185, I made a new SQLite database that should speedup the searches. On OPX, the search time for Parkstraße 5 frankfurt dropped from 20+s to 1-2s. There is an additional index in the database for that which made it bigger. I will look into how to reduce the size of it.

Please test whether it works for you. Using the same server code, just get the new database from "testing/europe" subfolder in mega.nz share.

@XOleg, that's really strange. Current link is
https://mega.nz/#F!8EsxXRTT!arad2NJ9rEhpXXn-YXsF8w , but maybe mega.nz is blocked as well. I will work on database distribution soon and maybe we can find servers that are possible to connect to from Russia. Although, I cannot really check it out from here.