# Text Deduplication

> Source: https://sukruyusufkaya.com/en/glossary/text-deduplication
> Updated: 2026-05-13T20:02:23.685Z
> Type: glossary
> Category: dogal-dil-isleme
**TLDR:** A process that removes identical or near-duplicate text samples from a dataset to improve training and evaluation quality.

<p>Text deduplication is one of the quiet but high-impact quality steps in large-scale corpus preparation. Repeated copies of the same or almost identical text can create bias, memorization, and misleading evaluation. It is especially critical in LLM pretraining, retrieval indexing, and test-set hygiene.</p>