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A modern runtime for JavaScript and TypeScript.
https://deno.com/
7847de0974
This PR optimizes `addEventListener` by replacing
`webidl.createDictionaryConverter("AddEventListenerOptions", ...)` with
a custom options parsing function to avoid the overhead of `webidl`
methods
**this PR**
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.1 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
---------------------------------------------------------------------------------------------------- -----------------------------
addEventListener options converter (undefined) 4.87 ns/iter 205,248,660.8 (4.7 ns … 13.18 ns) 4.91 ns 5.4 ns 5.6 ns
addEventListener options converter (signal) 13.02 ns/iter 76,782,031.2 (11.74 ns … 18.84 ns) 13.08 ns 16.22 ns 16.57 ns
```
**main**
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.1 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
---------------------------------------------------------------------------------------------------- -----------------------------
addEventListener options converter (undefined) 108.36 ns/iter 9,228,688.6 (103.5 ns … 129.88 ns) 109.69 ns 115.61 ns 125.28 ns
addEventListener options converter (signal) 134.03 ns/iter 7,460,878.1 (129.14 ns … 144.54 ns) 135.68 ns 141.13 ns 144.1 ns
```
```js
const tg = new EventTarget();
const signal = new AbortController().signal;
Deno.bench("addEventListener options converter (undefined)", () => {
tg.addEventListener("foo", null); // null callback to only bench options converter
});
Deno.bench("addEventListener options converter (signal)", () => {
tg.addEventListener("foo", null, { signal });
});
```
Towards https://github.com/denoland/deno/issues/20167
|
||
|---|---|---|
| .cargo | ||
| .devcontainer | ||
| .github | ||
| bench_util | ||
| cli | ||
| ext | ||
| runtime | ||
| test_ffi | ||
| test_napi | ||
| test_util | ||
| tools | ||
| .dlint.json | ||
| .dprint.json | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .rustfmt.toml | ||
| Cargo.lock | ||
| Cargo.toml | ||
| LICENSE.md | ||
| README.md | ||
| Releases.md | ||
| rust-toolchain.toml | ||
Deno
Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
Features
- Secure by default. No file, network, or environment access, unless explicitly enabled.
- Provides
web platform functionality and APIs,
e.g. using ES modules, web workers, and
fetch(). - Supports TypeScript out of the box.
- Ships only a single executable file.
- Built-in tooling including
deno test,deno fmt,deno bench, and more. - Includes a set of reviewed standard modules guaranteed to work with Deno.
- Supports npm.
Install
Shell (Mac, Linux):
curl -fsSL https://deno.land/install.sh | sh
PowerShell (Windows):
irm https://deno.land/install.ps1 | iex
Homebrew (Mac):
brew install deno
Chocolatey (Windows):
choco install deno
Scoop (Windows):
scoop install deno
Build and install from source using Cargo:
cargo install deno --locked
See deno_install and releases for other options.
Getting Started
deno run https://deno.land/std/examples/welcome.ts
Or setup a simple HTTP server:
Deno.serve((_req) => new Response("Hello, World!"));
Additional Resources
- The Deno Manual is a great starting point for additional examples, setting up your environment, using npm, and more.
- Runtime API reference documents all APIs built into Deno CLI.
- Deno Standard Modules do not have external dependencies and are reviewed by the Deno core team.
- deno.land/x is the registry for third party modules.
- Blog is where the Deno team shares important product updates and “how to”s about solving technical problems.
Contributing
We appreciate your help!
To contribute, please read our contributing instructions.