Question 1

Divan vs Criterion which is better for Rust benchmarks?

Accepted Answer

Divan is better for simplicity and quick setup with seamless Cargo integration, while Criterion offers more advanced statistical features and a mature ecosystem. Choose Divan if you need straightforward, ergonomic benchmarking without complex configurations.

Question 2

How to benchmark async functions with Divan?

Accepted Answer

Divan does not explicitly support async benchmarks in its current version. You may need to wrap async code in synchronous contexts using runtimes like Tokio, or check for future updates that add native async support.

Question 3

What is the performance overhead of using Divan?

Accepted Answer

Divan is designed to be fast with minimal overhead, using efficient sampling and iteration counting. However, specific overhead metrics aren't detailed in the README, so for ultra-low-level microbenchmarks, manual verification might be needed.

Question 4

Can I export Divan results to JSON or CSV for automation?

Accepted Answer

The default output is a human-readable table format. For machine-readable exports like JSON or CSV, you'll likely need to parse the output yourself or look for community tools, as native support isn't mentioned.

Question 5

Does Divan work on all operating systems like Windows?

Accepted Answer

Yes, Divan is Rust-based and should work on any platform supported by Rust and Cargo, including Windows, Linux, and macOS, as long as you have the required Rust version installed.

Question 6

How to integrate Divan benchmarks into a CI/CD pipeline?

Accepted Answer

You can run cargo bench as part of your CI scripts. Divan's output can be captured via standard output, but for automated pass/fail criteria or trend analysis, you may need custom parsing or scripts to extract specific metrics.

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