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Mar 7, 2019 · Big Data

In-Memory Inverted Index Compression Algorithms: Overview and MILC Optimization for High‑Performance Search

This article reviews major in‑memory inverted index compression techniques such as PForDelta, PEF, and MILC, explains their principles and trade‑offs, and details practical optimizations applied at 58.com to achieve query performance comparable to uncompressed indexes while reducing memory usage by about 35 percent.