{"adoption": {"forks": 573, "observed_at": "2026-08-28T04:10:23.509275+00:00", "stars": 8558}, "canonical_url": "https://ross.abutalabs.com/products/crossbeam", "card": {"archived": false, "artifact_type": "library", "description": "Tools for concurrent programming in Rust", "domain": ["developer-tools", "performance"], "enriched": true, "function": ["concurrency", "developer-tools"], "health_score": 98, "homepage": null, "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "stable", "member_repos": ["crossbeam-rs/crossbeam"], "name": "crossbeam-rs/crossbeam", "platform": ["rust", "cross-platform"], "pushed_at": "2026-08-11T10:11:15+00:00", "repo": "crossbeam-rs/crossbeam", "stars": 8558, "tags": ["lock-free", "channels", "work-stealing", "epoch-gc", "synchronization", "threads", "no-std", "algorithms"], "topics": ["synchronization", "concurrency", "parallelism", "threads", "lock-free", "data-structures", "rust"], "urls": [], "use_cases": ["pass messages between threads with mpmc channels", "build a work-stealing task scheduler", "spawn threads that borrow stack variables", "implement lock-free queues in rust", "synchronize thread start and end with wait groups", "avoid false sharing with cache line padding"], "what_it_is": "Crossbeam is a Rust library providing tools for concurrent programming, including lock-free data structures, MPMC channels, epoch-based garbage collection, and scoped thread spawning. It is widely used as a foundation for building task schedulers and parallel systems in Rust.", "when_to_avoid": ["you only need simple async concurrency, where tokio or std futures may suffice", "you need distributed or cross-process communication rather than in-process threading", "you want a batteries-included async runtime rather than low-level synchronization primitives"], "when_to_choose": ["you need battle-tested concurrent data structures or channels in Rust", "you want scoped threads that can borrow local variables safely", "you are building a scheduler or parallel runtime needing work-stealing deques"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/crossbeam", "repo": "crossbeam-rs/crossbeam", "role": "main", "score": 96}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:10:23.509275+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:26:18.183112+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "b2e0e9492c64f1845a8a68b89610acd45caa31ee09216305644955885fa64ab5", "fetched_at": "2026-08-28T04:10:23.509275+00:00", "kind": "readme", "missing": false, "url": "https://github.com/crossbeam-rs/crossbeam"}, {"content_hash": "fb6e4dd3a1d4cc052dc605526ba98d4e3040bea4233045c40727c4c8399caaff", "fetched_at": "2026-08-29T08:26:34.469670+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/crossbeam"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 97, "longevity": 100, "rhythm": 92}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4130, "days_push": 22, "days_rel": 58, "gap_med": 0.0, "n_releases_24m": 11}, "score": 96, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}