Aren't skip lists more-or-less essential for indexed search engines? I wouldn't say they're uncommon considering how much indexed search surrounds us. e.g., ht

Aren't skip lists more-or-less essential for indexed search engines? I wouldn't say they're uncommon considering how much indexed search surrounds us. e.g., http://lucene.apache.org/core/6_3_0/core/org/apache/lucene/codecs/MultiLevelSkipListReader.html http://lucene.apache.org/core/6_3_0/core/org/apache/lucene/c...