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A modern runtime for JavaScript and TypeScript.
https://deno.com/
32947e5ea5
Extracted from fast streams work.
This is a resource wrapper for `ReadableStream`, allowing us to treat
all `ReadableStream` instances as resources, and remove special paths in
both `fetch` and `serve`.
Performance with a ReadableStream response yields ~18% improvement:
```
return new Response(new ReadableStream({
start(controller) {
controller.enqueue(new Uint8Array([104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100]));
controller.close();
}
})
```
This patch:
```
12:36 $ third_party/prebuilt/mac/wrk http://localhost:8080
Running 10s test @ http://localhost:8080
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 99.96us 100.03us 6.65ms 98.84%
Req/Sec 47.73k 2.43k 51.02k 89.11%
959308 requests in 10.10s, 117.10MB read
Requests/sec: 94978.71
Transfer/sec: 11.59MB
```
main:
```
Running 10s test @ http://localhost:8080
2 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 163.03us 685.51us 19.73ms 99.27%
Req/Sec 39.50k 3.98k 66.11k 95.52%
789582 requests in 10.10s, 82.83MB read
Requests/sec: 78182.65
Transfer/sec: 8.20MB
```
|
||
|---|---|---|
| .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.