An example server for producing images of Mandelbrot sets using Rust's new async/await syntax. The server is a straightforward combination of the echo server example in the tokio crate and the Mandelbrot set plotter from the Programming Rust book.
Start the server:
cargo runWe can then interact with the server from another terminal window:
nc localhost 8080 > mandelbrot.png
1000x750 -1.20,0.35 -1,0.20I've noticed that Tokio doesn't do a great job of utilizing all CPU cores when executing the futures to render different bands in the Mandelbrot set being generated. A comment on the threadpool implementation, in fact, states:
The Tokio thread pool supports scheduling futures and processing them on multiple CPU cores. It is optimized for the primary Tokio use case of many independent tasks with limited computation and with most tasks waiting on I/O.
Consequently, I want to explore using a dedicated CPU pool for rendering the Mandelbrot set so we can allow the Tokio threadpool to focus on performing short IO tasks.