An interesting article by Carl Fredrik Samson about his journey with Rust. He started with porting some code from a familiar language, C# or C++ in this case. But if you just port the code you will probably miss some of the features that makes Rust special.
In this post he talks about how to port a short raytracer written in C#/C++ codebase to Rust, then applying some simple optimizations by leveraging some features in Rust.
Author then explains each line of code and how it was ported from C# to Rust (or as close as he could get). The observation?:
Rust is pretty similar to the optimized C# when we run the code ported line by line as similar as possible, but the memory usage is less than 1⁄4 of C#.
Then he describes:
- Optimizing part 1. Use iterators
- Optimizing part 2. Buffer the results if you can
- Optimizing part 3. Using Rayon
- Bonus: Fixing the huge increase in memory usage.
Rayon is a paralleization library for Rust, and gives us superpowers if you already have a piece of code that uses an iterator to produce a result.
Read more to learn how they slashed down render time to one ninth of original! Good read for anybody interested in systems programming languages like Rust.[Read More]