spider-rs/spider is a concurrency-focused web crawling engine written in Rust. The latest release of the repository is v2.52.2. The confirmed sources do not retain a changelog for this version. It cannot be said without evidence what this release improved; only what kind of tool this repository is and the scope of its publicly documented features can be confirmed.
Spider is a streaming collection engine that processes pages as it fetches them. The repository description presents the project as a low-latency web data collection tool written in Rust. It supports website link discovery and concurrent collection, and renders only pages that require JavaScript with headless Chrome while fetching the rest over HTTP. It handles collection and rendering together inside a single engine. It also provides proxy support, retries, request rate limiting, and stealth features for detection avoidance.
It uses the same API and concurrency model from a single script through to distributed worker environments, and the hosted service Spider Cloud uses the same engine. It is distributed as a library and a CLI and is publicly released under the MIT license. The repository was created on January 7, 2018, and has 2790 GitHub stars.
The evidence stops here. There is no changelog for v2.52.2, and no performance figures comparing it with other crawlers were found in the confirmed sources. The evaluation record retains only 2.3 for the momentum item on a 10-point scale, with no scores for the originality, technology, and quality items. A momentum score of 2.3 reads as on the low side. The scope — using the same API from a single script all the way to distributed worker environments — and the long public history are clearly visible. What this release improved, and where it stands among today's crawling tools, however, cannot be judged from this information alone.