{"adoption": {"forks": 53, "observed_at": "2026-08-28T04:04:48.825910+00:00", "stars": 1467}, "canonical_url": "https://ross.abutalabs.com/products/sep", "card": {"archived": false, "artifact_type": "library", "description": "World's Fastest .NET CSV Parser. Modern, minimal, fast, zero allocation, reading and writing of separated values (`csv`, `tsv` etc.). Cross-platform, trimmable and AOT/NativeAOT compatible with blazing fast SIMD vectorized parsing.", "domain": ["files", "data-science", "developer-tools", "machine-learning"], "enriched": true, "function": ["parser", "serialization", "data-science"], "health_score": 99, "homepage": "http://nietras.com", "language": "C#", "license": "MIT", "license_family": "permissive", "maturity": "active", "member_repos": ["nietras/Sep"], "name": "nietras/Sep", "platform": ["dotnet", "cross-platform"], "pushed_at": "2026-08-17T14:49:23+00:00", "repo": "nietras/Sep", "stars": 1467, "tags": ["csv", "tsv", "simd", "zero-allocation", "performance", "separated-values"], "topics": ["csharp", "csv", "csv-parser", "csv-reader", "csv-writer", "dotnet", "performance", "simd"], "urls": [], "use_cases": ["parse large csv files fast in .net", "read tsv files with zero allocations", "write csv files in c#", "load machine learning datasets from csv", "high performance csv parsing with simd", "multithreaded csv parsing in dotnet"], "what_it_is": "Sep is a modern, minimal .NET library for reading and writing separated values (CSV, TSV, etc.) with zero allocations and SIMD-vectorized parsing. It targets machine learning and data pipeline use cases and is cross-platform, trimmable, and AOT/NativeAOT compatible.", "when_to_avoid": ["you need extensive CSV dialect options, automatic escaping, or RFC 4180 edge-case handling out of the box", "you are not on .NET 7+ / C# 11+", "you need a full data manipulation library rather than a parser"], "when_to_choose": ["you need maximum CSV/TSV parsing throughput in .NET", "you want zero-allocation, AOT-compatible parsing for ML pipelines", "you prefer a minimal, opinionated API over configurable CSV readers"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/sep", "repo": "nietras/Sep", "role": "main", "score": 97}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:04:48.825910+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T04:35:00.952343+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "27c93d6630aae5b75ead62d4fed9fd0e5b0d1aee5c39adaf8d6e01f66dd0c18a", "fetched_at": "2026-08-28T04:04:48.825910+00:00", "kind": "readme", "missing": false, "url": "https://github.com/nietras/Sep"}, {"content_hash": "cf611f7c8e892b735eb573691b1b7779e8aabceb12717ddb4c9f4728faecbf83", "fetched_at": "2026-08-29T11:43:09.304017+00:00", "kind": "homepage", "missing": false, "url": "http://nietras.com"}, {"content_hash": "108c513a45bd98ed331e754c4fc89ae05a0d6589dd1ebe67f945a23741aadfba", "fetched_at": "2026-08-29T11:43:09.313781+00:00", "kind": "site_page", "missing": false, "url": "https://nietras.com/about"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 98, "longevity": 92, "rhythm": 98}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 1294, "days_push": 16, "days_rel": 16, "gap_med": 17.5, "n_releases_24m": 29}, "score": 97, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}