Tauri vs Electron: performance and developer experience compared

Every time someone builds a desktop app with web technologies, the same question comes up: Tauri or Electron? Both let you write UIs with HTML, CSS, and JavaScript. Both run on Windows, macOS, and Linux. But the engineering decisions underneath are radically different, and those decisions have real consequences for your users.

I’ve shipped production apps with both. Here is what the numbers look like and where you’ll run into walls.

Binary size: the most obvious difference

An Electron hello world starts around 130MB on disk. The framework bundles a full Chromium instance plus a Node.js runtime. That’s non-negotiable. Slack sits at 200MB installed. VS Code is around 350MB. Discord is over 200MB. These numbers are the direct result of shipping an entire browser engine with every app.

Tauri takes a different route. It uses the operating system’s built-in webview: WebView2 on Windows, WebKit on macOS, WebKitGTK on Linux. A Tauri hello world compiles to 3 to 8MB. Even a real app with significant frontend complexity typically lands under 15MB.

// Tauri main.rs - the entire backend fits in a few lines
fn main() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![
            greet,
            read_config,
            save_file,
        ])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

#[tauri::command]
fn greet(name: &str) -> String {
    format!("Hello, {}!", name)
}

The tradeoff is consistency. Electron ships the same Chromium version everywhere, so your app renders identically on every platform. Tauri depends on the system webview, which means you test against three different rendering engines. WebView2 on Windows 10 behaves differently from WebView2 on Windows 11. WebKitGTK versions vary wildly across Linux distributions. If pixel-perfect cross-platform rendering matters to you, this is a real cost.

Memory usage at idle and under load

This is where the gap gets painful. Electron spawns multiple processes: a main process, a GPU process, a utility process, and one renderer process per window. Each renderer carries its own V8 heap, DOM tree, and CSS engine. A freshly launched Electron app with one empty window sits at 80 to 120MB of RAM.

Tauri shares the system webview process. One idle Tauri window typically consumes 30 to 50MB. The difference compounds fast. Run three Electron apps side by side and you’ve allocated 300 to 400MB before any of them have done anything useful. Three Tauri apps might total 100 to 150MB.

Under load the gap narrows but doesn’t disappear. An Electron app rendering a large data table with virtual scrolling can hit 400 to 600MB. The same table in Tauri might use 200 to 350MB. Both frameworks are ultimately running JavaScript in a webview, so the DOM overhead is similar. Electron just has more fixed costs per process.

The practical impact is simple. If your users run on machines with 8GB of RAM and keep multiple apps open, Electron apps crowd out everything else. Tauri apps leave more headroom for the browser, IDE, and other tools your users actually need.

Startup time

Electron takes 2 to 4 seconds to cold-start a moderately complex app. The framework has to initialize Chromium, parse the main window HTML, bootstrap the JavaScript context, and run your app’s initialization code. VS Code starts in about 3 seconds on a fast machine. Slack takes 4 to 5 seconds. These times improve with warm caches, but the floor is high because Chromium itself takes over a second just to initialize.

Tauri cold-starts in 500ms to 1.5 seconds for a comparable app. The system webview is already partially initialized on most operating systems, and Tauri’s Rust backend compiles to native code with no VM warmup. On warm starts, Tauri apps often appear in under 300ms.

// Tauri startup is fast because Rust init is native, no VM bootstrap
fn main() {
    tauri::Builder::default()
        .setup(|app| {
            // This runs before the window is shown
            // Native code, no JIT warmup needed
            let config = load_config_sync()?;
            app.manage(AppState { config });
            Ok(())
        })
        .run(tauri::generate_context!())
        .expect("failed to run app");
}

For most desktop apps, startup time under 2 seconds feels instant. Electron apps that cross the 3-second mark start to feel heavy. Users notice. They may not articulate it as “slow startup,” but they feel it every time they open the app.

CPU efficiency during background work

Electron apps running background work (file syncing, WebSocket connections, polling) consume noticeably more CPU than equivalent Tauri apps. The Node.js event loop and V8 garbage collector create a baseline CPU cost that Rust doesn’t have. A Tauri app with a background thread doing SQLite writes or network polling might use 0.1 to 0.5% CPU at idle. An Electron app doing the same work through Node.js often sits at 1 to 3%.

This matters for laptop battery life. Over an 8-hour workday, that extra 1 to 2% CPU usage translates to noticeably shorter battery life. If your app runs in the background all day (a chat client, a file sync tool, a monitoring dashboard), Tauri’s lower CPU overhead makes a difference.

// Background work in Tauri uses native threads, no GC pauses
use tauri::Manager;

#[tauri::command]
async fn start_sync(app: tauri::AppHandle) -> Result<(), String> {
    std::thread::spawn(move || {
        loop {
            std::thread::sleep(std::time::Duration::from_secs(30));
            let result = sync_data_blocking();
            app.emit("sync-complete", result).unwrap();
        }
    });
    Ok(())
}

The Rust backend also gives you direct access to system APIs without FFI overhead. File system operations, network requests, and database queries all run as native code. Electron requires either Node.js bindings (which add overhead) or native modules (which complicate your build pipeline).

Developer experience and ecosystem

Electron wins on ecosystem. NPM has the largest package registry in any language. If you need a rich text editor, there’s ProseMirror and TipTap. If you need charts, there’s D3 and Chart.js. If you need a component library, there are dozens. The Electron documentation is mature. Stack Overflow answers are easy to find. You can hire Electron developers easily.

Tauri’s ecosystem is smaller but growing. The frontend story is identical: you can use React, Vue, Svelte, or plain HTML. Tauri doesn’t constrain your frontend choices. The backend story is Rust, which means fewer off-the-shelf libraries but better correctness guarantees. The Tauri documentation has improved over the past year, and the community is active.

One area where Tauri has a real edge is security. The framework ships with a capability-based permission system. You declare what your app can do in a config file, and Tauri enforces those permissions at the IPC boundary. Electron has context isolation and sandboxing, but they’re opt-in and frequently misconfigured. The average Electron app has a larger attack surface than the average Tauri app because Tauri’s security model is stricter by default.

When to pick which

Pick Electron if you need the ecosystem. If your app depends on a specific NPM package that doesn’t have a Rust equivalent, Electron saves you from reinventing the wheel. If your team knows JavaScript and doesn’t have Rust experience, Electron’s learning curve is basically zero. If you need pixel-perfect cross-platform rendering, Chromium’s consistency beats the system webview roulette.

Pick Tauri if you care about resource usage. If your app runs in the background all day, the CPU and memory savings matter. If you’re distributing to users on older hardware or in bandwidth-constrained environments, the smaller binary size is a real advantage. If your app has significant backend logic, writing it in Rust gives you better performance and correctness than Node.js.

Both frameworks are production-ready. Neither is a toy. The choice comes down to what matters more for your specific app: ecosystem depth or resource efficiency.

Building native desktop with Rust

If Tauri’s performance profile appeals to you but you want to skip the webview entirely, GPUI offers a third path. GPUI renders directly to the GPU using Metal on macOS and Vulkan elsewhere. No DOM, no CSS engine, no JavaScript runtime. You write pure Rust, and the framework handles layout and rendering through a custom GPU pipeline.

For a production-ready starting point, check out gpui-starter on GitHub. It ships with multi-page navigation, 21 themes with hot-reload, i18n support, form validation, a command palette, macOS tray integration, and SQLite persistence.