Initial profiling support for Iced.

Cargo.toml

@@ -39,6 +39,14 @@ smol = ["iced_futures/smol"]
 palette = ["iced_core/palette"]
 # Enables querying system information
 system = ["iced_winit/system"]
+# Enables tracing with Chrome
+trace_chrome = [
+    "iced_winit/trace",
+    "iced_wgpu?/trace",
+    "iced_glow?/trace",
+    "iced_glutin?/trace",
+    "iced_profiling/tracing-chrome"
+]
 
 [badges]
 maintenance = { status = "actively-developed" }
@@ -51,6 +59,7 @@ members = [
     "glow",
     "glutin",
     "lazy",
+    "profiling",
     "native",
     "style",
     "wgpu",
@@ -66,6 +75,7 @@ iced_graphics = { version = "0.5", path = "graphics" }
 iced_winit = { version = "0.6", path = "winit", features = ["application"] }
 iced_glutin = { version = "0.5", path = "glutin", optional = true }
 iced_glow = { version = "0.5", path = "glow", optional = true }
+iced_profiling = { version = "0.1.0", path = "profiling", optional = true }
 thiserror = "1.0"
 
 [dependencies.image_rs]

examples/integration_wgpu/Cargo.toml

@@ -8,6 +8,7 @@ publish = false
 [dependencies]
 iced_winit = { path = "../../winit" }
 iced_wgpu = { path = "../../wgpu", features = ["webgl"] }
+iced_profiling = { path = "../../profiling", features = ["tracing-chrome"]}
 env_logger = "0.8"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]

examples/integration_wgpu/src/main.rs

@@ -16,6 +16,8 @@ use winit::{
     event_loop::{ControlFlow, EventLoop},
 };
 
+use iced_profiling::info_span;
+
 #[cfg(target_arch = "wasm32")]
 use wasm_bindgen::JsCast;
 #[cfg(target_arch = "wasm32")]
@@ -39,6 +41,9 @@ pub fn main() {
     #[cfg(not(target_arch = "wasm32"))]
     env_logger::init();
 
+    // Initialize tracing
+    let _guard = iced_profiling::init();
+
     // Initialize winit
     let event_loop = EventLoop::new();
 
@@ -198,6 +203,8 @@ pub fn main() {
                 }
             }
             Event::RedrawRequested(_) => {
+                let _ = info_span!("Integration_WGPU", "DRAW").entered();
+
                 if resized {
                     let size = window.inner_size();
 

glow/Cargo.toml

@@ -8,6 +8,7 @@ license = "MIT AND OFL-1.1"
 repository = "https://github.com/iced-rs/iced"
 
 [features]
+trace = ["iced_profiling"]
 svg = ["iced_graphics/svg"]
 image = ["iced_graphics/image"]
 png = ["iced_graphics/png"]
@@ -42,6 +43,11 @@ version = "0.5"
 path = "../graphics"
 features = ["font-fallback", "font-icons", "opengl"]
 
+[dependencies.iced_profiling]
+version = "0.1.0"
+path = "../profiling"
+optional = true
+
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]
 all-features = true

glow/src/image.rs

@@ -21,6 +21,9 @@ use glow::HasContext;
 
 use std::cell::RefCell;
 
+#[cfg(feature = "trace")]
+use iced_profiling::info_span;
+
 #[derive(Debug)]
 pub(crate) struct Pipeline {
     program: <glow::Context as HasContext>::Program,
@@ -148,6 +151,9 @@ impl Pipeline {
         images: &[layer::Image],
         layer_bounds: Rectangle<u32>,
     ) {
+        #[cfg(feature = "trace")]
+        let _ = info_span!("Glow::Image", "DRAW").entered();
+
         unsafe {
             gl.use_program(Some(self.program));
             gl.bind_vertex_array(Some(self.vertex_array));

glow/src/quad.rs

@@ -7,6 +7,9 @@ use glow::HasContext;
 use iced_graphics::layer;
 use iced_native::Rectangle;
 
+#[cfg(feature = "trace")]
+use iced_profiling::info_span;
+
 #[derive(Debug)]
 pub enum Pipeline {
     Core(core::Pipeline),
@@ -42,6 +45,9 @@ impl Pipeline {
         scale: f32,
         bounds: Rectangle<u32>,
     ) {
+        #[cfg(feature = "trace")]
+        let _ = info_span!("Glow::Quad", "DRAW").enter();
+
         match self {
             Pipeline::Core(pipeline) => {
                 pipeline.draw(

glow/src/triangle.rs

@@ -9,6 +9,9 @@ use iced_graphics::triangle::{ColoredVertex2D, Vertex2D};
 use glow::HasContext;
 use std::marker::PhantomData;
 
+#[cfg(feature = "trace")]
+use iced_profiling::info_span;
+
 const DEFAULT_VERTICES: usize = 1_000;
 const DEFAULT_INDICES: usize = 1_000;
 
@@ -58,6 +61,9 @@ impl Pipeline {
         transformation: Transformation,
         scale_factor: f32,
     ) {
+        #[cfg(feature = "trace")]
+        let _ = info_span!("Glow::Triangle", "DRAW").enter();
+
         unsafe {
             gl.enable(glow::MULTISAMPLE);
             gl.enable(glow::SCISSOR_TEST);

glutin/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["gui", "ui", "graphics", "interface", "widgets"]
 categories = ["gui"]
 
 [features]
+trace = ["iced_profiling/tracing-chrome"]
 debug = ["iced_winit/debug"]
 system = ["iced_winit/system"]
 
@@ -35,3 +36,8 @@ features = ["application"]
 version = "0.5"
 path = "../graphics"
 features = ["opengl"]
+
+[dependencies.iced_profiling]
+version = "0.1.0"
+path = "../profiling"
+optional = true

glutin/src/application.rs

@@ -17,6 +17,9 @@ use iced_winit::{Clipboard, Command, Debug, Proxy, Settings};
 use glutin::window::Window;
 use std::mem::ManuallyDrop;
 
+#[cfg(feature = "trace")]
+use iced_profiling::{info_span, instrument::Instrument};
+
 /// Runs an [`Application`] with an executor, compositor, and the provided
 /// settings.
 pub fn run<A, E, C>(
@@ -35,9 +38,15 @@ where
     use glutin::platform::run_return::EventLoopExtRunReturn;
     use glutin::ContextBuilder;
 
+    #[cfg(feature = "trace")]
+    let _guard = iced_profiling::init();
+
     let mut debug = Debug::new();
     debug.startup_started();
 
+    #[cfg(feature = "trace")]
+    let _ = info_span!("Application::Glutin", "RUN").entered();
+
     let mut event_loop = EventLoopBuilder::with_user_event().build();
     let proxy = event_loop.create_proxy();
 
@@ -124,18 +133,26 @@ where
 
     let (mut sender, receiver) = mpsc::unbounded();
 
-    let mut instance = Box::pin(run_instance::<A, E, C>(
-        application,
-        compositor,
-        renderer,
-        runtime,
-        proxy,
-        debug,
-        receiver,
-        context,
-        init_command,
-        settings.exit_on_close_request,
-    ));
+    let mut instance = Box::pin({
+        let run_instance = run_instance::<A, E, C>(
+            application,
+            compositor,
+            renderer,
+            runtime,
+            proxy,
+            debug,
+            receiver,
+            context,
+            init_command,
+            settings.exit_on_close_request,
+        );
+
+        #[cfg(feature = "trace")]
+        let run_instance =
+            run_instance.instrument(info_span!("Application", "LOOP"));
+
+        run_instance
+    });
 
     let mut context = task::Context::from_waker(task::noop_waker_ref());
 
@@ -333,6 +350,9 @@ async fn run_instance<A, E, C>(
                 messages.push(message);
             }
             event::Event::RedrawRequested(_) => {
+                #[cfg(feature = "trace")]
+                let _ = info_span!("Application", "FRAME").entered();
+
                 debug.render_started();
 
                 #[allow(unsafe_code)]

profiling/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "iced_profiling"
+authors = ["Bingus <shankern@protonmail.com>"]
+version = "0.1.0"
+edition = "2021"
+description = "Profiling backend implementations for Iced"
+
+[dependencies]
+tracing = { version = "0.1.37", default-features = false, features = ["std"] }
+tracing-core = "0.1.30"
+tracing-subscriber = { version = "0.3.16", features = ["registry", "env-filter"] }
+
+[dependencies.tracing-chrome]
+version = "0.7.0"
+optional = true

profiling/README.md

@@ -0,0 +1,61 @@
+# `iced_profiling`
+[![Documentation](https://docs.rs/iced_profiling/badge.svg)]
+[![Crates.io](https://img.shields.io/crates/v/iced_profiling.svg)](https://crates.io/crates/iced_profiling)
+[![License](https://img.shields.io/crates/l/iced_profiling.svg)](https://github.com/iced-rs/iced/blob/master/LICENSE)
+[![Discord Server](https://img.shields.io/discord/628993209984614400?label=&labelColor=6A7EC2&logo=discord&logoColor=ffffff&color=7389D8)](https://discord.gg/3xZJ65GAhd)
+
+`iced_profiling` is a crate which implements various tracing backends for Iced.
+
+It relies on the [tracing](https://crates.io/crates/tracing) crate to collect diagnostics. We currently only support 
+tracing with `tracing`'s `info_span!` macro, but will consider different logging levels in the future. PRs welcome!
+
+## Trace backends
+
+We currently support only Chrome JSON traces using the [tracing-chrome](https://crates.io/crates/tracing-chrome) crate.
+
+There are plans to add support for [Tracy](https://github.com/wolfpld/tracy) in the near future!
+
+## Generating a trace file
+
+### Using Iced's `Application`
+
+Simply enable your tracing backend of choice (e.g. `trace_chrome`) feature in Iced & run your project.
+
+```shell
+cargo run --features iced/trace_chrome
+```
+### Standalone dependency
+
+You can enable tracing by enabling your tracing backend of choice as a feature of `iced_profiling`.
+
+```toml
+iced_profiling = { version = "0.1.0", features = ["tracing-chrome"]}
+```
+
+Doing so will require you to initialize the profiler manually like so:
+
+```rust
+let _guard = iced_profiling::init();
+```
+
+This reference must be kept alive for the entire duration of your application that you wish to profile.
+
+## Chrome
+
+By default, Chrome trace files will be generated in the current working directory:
+```shell
+path/to/your/project/project_trace_{timestamp}.json
+```
+
+You also set a specific path by setting the `CHROME_TRACE_FILE` env variable:
+```shell
+CHROME_TRACE_FILE = ~/Desktop/trace.json cargo run
+```
+
+If you cannot find your trace file, there may have been a permission issue when trying to generate your file. Be sure to check your cargo manifest directory!
+
+Once your file is generated, you can view it in Google Chrome at either [ui.perfetto.dev](ui.perfetto.dev) (new) or [chrome://trace](chrome://trace) (old).
+
+<p align="center">
+  <img alt="The native target" src="../docs/images/perfetto.png" width="80%">
+</p>