{"adoption": {"forks": 152, "observed_at": "2026-08-28T04:05:01.158536+00:00", "stars": 1542}, "canonical_url": "https://ross.abutalabs.com/products/vc", "card": {"archived": false, "artifact_type": "library", "description": "SIMD Vector Classes for C++", "domain": ["performance", "cross-platform"], "enriched": true, "function": ["math", "concurrency", "compiler"], "health_score": 82, "homepage": null, "language": "C++", "license": "BSD-3-Clause", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["VcDevel/Vc"], "name": "VcDevel/Vc", "platform": ["cpp", "windows", "cross-platform"], "pushed_at": "2026-07-07T14:19:59+00:00", "repo": "VcDevel/Vc", "stars": 1542, "tags": ["simd", "vectorization", "data-parallel", "avx", "sse", "explicit-vectorization", "cpu-optimization", "high-performance-computing", "cpp11", "cpp17", "algorithms", "linux", "macos"], "topics": ["vectorization", "parallel", "simd-vector", "simd-instructions", "simd", "avx", "c-plus-plus", "avx512", "sse", "neon", "cpp", "portable", "cpp11", "cpp14", "cpp17", "avx2", "simd-programming", "data-parallel", "parallel-computing"], "urls": [], "use_cases": ["explicitly vectorize C++ code with SIMD instructions", "write portable data-parallel code that compiles for AVX, SSE, or scalar targets", "speed up numeric loops that compilers fail to auto-vectorize efficiently", "apply the same operations to multiple values in parallel on the CPU", "migrate scalar math-heavy code to SIMD without writing intrinsics", "benchmark or compare vectorized vs scalar implementations across instruction sets"], "what_it_is": "Vc is a portable, zero-overhead C++ library providing vector class types for explicit data-parallel (SIMD) programming. It lets developers state parallelism via the type system and compile the same code for AVX, AVX2, SSE2-SSE4.2, or scalar targets across different compilers.", "when_to_avoid": ["you are starting a new project - the README recommends std::simd (std-simd) instead", "you need AVX-512, NEON, or GPU/CUDA support, which is not available in the 1.x releases", "you rely on auto-vectorization of large loops spanning multiple translation units rather than explicit types", "you need actively developed features or new instruction set support"], "when_to_choose": ["you need explicit, fine-grained SIMD control in C++ without hand-written intrinsics", "you want one codebase portable across x86 SIMD instruction sets and compilers", "you are maintaining an existing project already built on Vc", "you need zero-overhead abstractions where parallelism is expressed through types"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/vc", "repo": "VcDevel/Vc", "role": "main", "score": 64}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:01.158536+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T04:30:43.196915+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "8ae910003624e5d490ecabd6e04fe74eae1f40ef2734c4c14be8b7809772ec38", "fetched_at": "2026-08-28T04:05:01.158536+00:00", "kind": "readme", "missing": false, "url": "https://github.com/VcDevel/Vc"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 91, "longevity": 100, "rhythm": 8}, "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": 4572, "days_push": 57, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 64, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}