[perf] use AHash for hashmap

[HerringtonDarkholme]

⭐ Suggestion

We can use ahash to improve HashMap performance. ast-grep does not need cryptographically good hash.

💻 Use Cases

Use this rule to find potential usages worth refactoring.

id: replace-hash
message: use ahash?
severity: info
language: Rust
rule:
  pattern: use std::collections::HashMap;
  not:
    inside:
      stopBy: end
      pattern: mod test { $$$ }