# blocklist [](https://github.com/pagescrape/blocklist/actions/workflows/rust.yml)
The project is based on blocklistproject. It provides perfect hash map/set structures for fast lookup of blocklisted items.
```rust,no_run
assert!(blocklist::is_advertisement("3003809.fls.doubleclick.net"));
assert!(!blocklist::is_advertisement("example.com"));
```