How we migrated our static analyzer from Java to Rust

We replaced the Java-based static analyzer with a Rust-based one, which tripled our performance and resulted in a tenfold reduction in memory usage. We achieved this by leveraging Tree-sitter's parsing capabilities and GraalVM's JavaScript runtime. The migration was successful despite being the first major Rust project for Datadog, thanks to a firm grasp of Rust concepts within 10 days, strict coding standards, and the use of specialized tools and libraries. The new analyzer provides faster feedback on pull requests and improved performance in resource-constrained environments like CI systems with limited RAM and CPU resources.

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