https://github.com/old-storyai/tracing-wasm

`tracing` crate compatible `Subscriber` for reporting spans through browser `window.performance`
https://github.com/old-storyai/tracing-wasm

Last synced: 6 months ago
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`tracing` crate compatible `Subscriber` for reporting spans through browser `window.performance`

• Host: GitHub
• URL: https://github.com/old-storyai/tracing-wasm
• Owner: old-storyai
• License: apache-2.0
• Created: 2020-07-10T19:17:24.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2024-05-02T21:00:42.000Z (about 1 year ago)
• Last Synced: 2024-10-31T11:27:39.982Z (7 months ago)
• Language: Rust
• Size: 1.31 MB
• Stars: 69
• Watchers: 3
• Forks: 22
• Open Issues: 15
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

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README

        
# `tracing-wasm`

Leverage performance profiling with your browser tools with the [tracing crate](https://crates.io/crates/tracing).

[![Crates.io][crates-badge]][crates-url]

[![Documentation][docs-badge]][docs-url]

[![MIT licensed][mit-badge]][mit-url]

[![APACHE licensed][apache-2-badge]][apache-2-url]

[crates-badge]: https://img.shields.io/crates/v/tracing-wasm.svg

[crates-url]: https://crates.io/crates/tracing-wasm

[docs-badge]: https://docs.rs/tracing-wasm/badge.svg

[docs-url]: https://docs.rs/tracing-wasm

[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg

[mit-url]: LICENSE-MIT

[apache-2-badge]: https://img.shields.io/badge/license-APACHE%202.0-blue.svg

[apache-2-url]: LICENSE-APACHE

![Screenshot of performance reported using the `tracing-wasm` Subscriber](./2020-07-10-devtools-demo-screenshot.png)

Note: `tracing_wasm` uses the global JavaScript `console` and `performance` objects. It will not work in environments where one or both of these are not available, such as Node.js or Cloudflare Workers.

## Usage

For the simplest out of the box set-up, you can simply set `tracing_wasm` as your default tracing Subscriber in wasm_bindgen(start)

We have this declared in our `./src/lib.rs`

```rust

#[wasm_bindgen(start)]

pub fn start() -> Result<(), JsValue> {

    // print pretty errors in wasm https://github.com/rustwasm/console_error_panic_hook

    // This is not needed for tracing_wasm to work, but it is a common tool for getting proper error line numbers for panics.

    console_error_panic_hook::set_once();

    // Add this line:

    tracing_wasm::set_as_global_default();

    Ok(())

}

```