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Why We Killed 276K Lines of C++ Code: Migrating a Cloud Database to Rust Saved Our Startup
- A startup called RisingWave decided to replace 276,406 lines of C++ code with Rust for their database project, facing challenges like unreadable coding style and memory leaks in C++.
- Despite experienced C++ engineers in the team, they found C++ shortcomings to be overwhelming and made the difficult decision to move to Rust for their database system.
- The transition from C++ to Rust required rewriting the entire system from scratch, but ultimately proved beneficial as RisingWave gained popularity with over 7,600 stars on GitHub.
- C++ offers high performance and control over memory and computation but comes with challenges like debugging difficulties and dependency management issues.
- Rust was chosen over C++ for RisingWave as it guarantees memory safety, thread safety, zero-cost abstractions, and efficient collaboration, making it a better choice for the project.
- Rust's safety features, ease of use, manageability of unsafe code, and learning curve were significant factors in favor of choosing Rust over C++ for RisingWave's database project.
- Despite some challenges with Rust, such as fragmented async ecosystem and cumbersome error handling, the overall productivity and code quality improvements were substantial.
- The decision to switch to Rust was influenced by factors like codebase refactoring, advocacy from Rust enthusiasts in the team, and rapid expansion of the engineering team.
- The article highlights the importance of carefully evaluating factors like low-level programming needs, availability of expertise, time requirements, and potential impact on deadlines before deciding to switch programming languages.
- While Rust may offer benefits, it's essential not to rewrite a project solely based on trendiness, but rather on practical considerations and project-specific needs.
- Making a wise choice in selecting a programming language can significantly impact the success and efficiency of a project, potentially saving substantial time and resources in the long run.
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