Scalable current leaderboard using delta-encoded updates

摘要

Systems and techniques are provided for providing a scalable current leaderboard. Entries may be received. The entries may include an identifier and a score. The entries may be sorted according to a sorting criterion to obtain a leaderboard. The entries may be ranked with a rank according to the position of the entry on the leaderboard. The entry may include the rank. The leaderboard may be divided into buckets. Each bucket may include consecutive entries from the leaderboard. One of the entries may be included at the end of a first buckets and at the beginning of a second buckets. The buckets may be ordered sequentially. The bucket may be updated with score versions to produce an updated bucket, where the score versions may include new versions and old versions.