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How It Works
Skip lists are probabilistic data structures that use multiple levels of linked lists as "express lanes" for fast traversal.
Expected time: O(log n) search, insert, delete
Space: O(n) expected
vs Balanced BSTs: Skip lists achieve similar O(log n) performance without complex rotations. Simpler to implement, lock-free concurrent variants exist.
Real-world uses:
• Redis sorted sets (ZSET)
• LevelDB / RocksDB memtables
• Lucene posting lists
• MemSQL lock-free indexing
Expected time: O(log n) search, insert, delete
Space: O(n) expected
vs Balanced BSTs: Skip lists achieve similar O(log n) performance without complex rotations. Simpler to implement, lock-free concurrent variants exist.
Real-world uses:
• Redis sorted sets (ZSET)
• LevelDB / RocksDB memtables
• Lucene posting lists
• MemSQL lock-free indexing