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license: mit
tags:
- arxiv
- metadata
---
# ResearchIT metadata sidecar
A read-only SQLite mirror of the ResearchIT `papers` table (1,597,097 arXiv
papers), carrying the indexes the upstream Turso database does not have.
Consumed by [ResearchIT](https://huggingface.co/spaces/siddhm11/ResearchIT);
the Dockerfile downloads `metadata.sqlite` at image build time.
## Why
Turso has a single index (`arxiv_id`), so it serves point lookups quickly and
everything else via a full scan of 1.6M rows. Measured:
| query | Turso | sidecar |
|---|---|---|
| metadata for 50 ids | ~1,200 ms | 0.5 ms |
| trending by category | ~15,000 ms | 45 ms |
| `MIN/MAX(update_date)` | times out (>100 s) | 50 ms |
## Schema
- `papers` — arxiv_id, title, authors, abstract_preview, categories,
primary_topic, update_date, citation_count, influential_citations
- `paper_categories` — one row per (paper, arXiv code); 2,953,666 rows across
176 codes. Indexed on `(code, citation_count DESC)` and
`(code, update_date DESC)`.
Coverage: `update_date` spans 2007-05-23 to 2025-05-30.
Rebuild with `scripts/build_metadata_sidecar.py` in the ResearchIT repo.
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