Await-Tree – Visualize Async Rust Task Execution in Real-Time
Generate accurate and informative tree dumps of asynchronous tasks. - risingwavelabs/await-tree
Await-Tree – Visualize Async Rust Task Execution in Real-Time launched on April 2, 2025 with 28 votes, #752 of 7,818 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Await-Tree is a developer tool for visualizing async Rust task execution in real-time. It helps Rust programmers understand and debug asynchronous code by displaying how tasks are running and waiting. The tool is designed for developers working with async Rust projects who need to trace task behavior and identify performance issues or bottlenecks in their concurrent code.
written from the facts on this page · September 2026
From the sources
The Future s in Async Rust can be arbitrarily composited or nested to achieve a variety of control flows. Assuming that the execution of each Future is represented as a node, then the asynchronous execution of an async task can be organized into a logical tree , which is constantly transformed over the polling, completion, and cancellation of Future s. await-tree allows developers to dump this execution tree at runtime, with the span of each Future annotated by instrument_await . A basic example is shown below, and more examples of complex control flows can be found in the examples directory. async fn bar ( i : i32 ) { // static span baz ( i ) . instrument_await ( "baz in bar" ) . await }…from github.com
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