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A modern runtime for JavaScript and TypeScript.
https://deno.com/
049aebee34
This PR adds caching to node's `req.headers`
```js
import express from "npm:express";
const app = express();
app.get("/", function (req, res) {
const ua = req.header("User-Agent");
const auth = req.header("Authorization");
const type = req.header("Content-Type");
const ip = req.header("X-Forwarded-For");
res.end();
});
app.listen(3000);
```
**this PR**
```
wrk -d 10s --latency http://127.0.0.1:3000
Running 10s test @ http://127.0.0.1:3000
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 155.64us 152.14us 5.74ms 97.39%
Req/Sec 35.00k 1.97k 39.10k 80.69%
Latency Distribution
50% 123.00us
75% 172.00us
90% 214.00us
99% 563.00us
703420 requests in 10.10s, 50.31MB read
Requests/sec: 69648.45
Transfer/sec: 4.98MB
```
**main**
```
wrk -d 10s --latency http://127.0.0.1:3000
Running 10s test @ http://127.0.0.1:3000
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 217.95us 786.89us 26.26ms 98.23%
Req/Sec 32.32k 2.54k 37.19k 87.13%
Latency Distribution
50% 130.00us
75% 191.00us
90% 232.00us
99% 1.88ms
649411 requests in 10.10s, 46.45MB read
Requests/sec: 64300.44
Transfer/sec: 4.60MB
```
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| .cargo | ||
| .devcontainer | ||
| .github | ||
| bench_util | ||
| cli | ||
| ext | ||
| runtime | ||
| test_ffi | ||
| test_napi | ||
| test_util | ||
| third_party@7f1a41fee1 | ||
| 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.