Lossless 5x Compression: Late Interaction Retrieval Retention Hits 99.4%

antoine_chaffin · x · 2026-07-07

Summary: Through regularization training for hierarchical pooling, the author increased the retention rate of a late interaction retrieval model under 32 token compression from 77% (without regularization) to 99.4%. This achieves nearly lossless 5x compression without compromising full token performance. The author notes there is still significant room for further improvement.

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