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A modern runtime for JavaScript and TypeScript.
https://deno.com/
1a1283fa4d
This PR improves performance of `Deno.Serve` when providing `info` argument by creating `ServeHandlerInfo` class instead of creating an object literal with a getter on every request. ```js Deno.serve((_req, info) => new Response(info.remoteAddr.transport) }); ``` ### Benchmarks ``` wrk -d 10s --latency http://127.0.0.1:4500 Running 10s test @ http://127.0.0.1:4500 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 42.34us 16.30us 1.66ms 95.88% Req/Sec 118.17k 2.95k 127.38k 76.73% Latency Distribution 50% 38.00us 75% 41.00us 90% 56.00us 99% 83.00us 2375298 requests in 10.10s, 319.40MB read Requests/sec: 235177.04 Transfer/sec: 31.62MB ``` **main** ``` wrk -d 10s --latency http://127.0.0.1:4500 Running 10s test @ http://127.0.0.1:4500 2 threads and 10 connections Thread Stats Avg Stdev Max +/- Stdev Latency 78.86us 211.06us 3.58ms 96.52% Req/Sec 105.90k 4.35k 117.41k 78.22% Latency Distribution 50% 41.00us 75% 53.00us 90% 62.00us 99% 1.18ms 2127534 requests in 10.10s, 286.09MB read Requests/sec: 210647.49 Transfer/sec: 28.33MB ``` ``` cpu: 13th Gen Intel(R) Core(TM) i9-13900H runtime: deno 1.36.0 (x86_64-unknown-linux-gnu) benchmark time (avg) iter/s (min … max) p75 p99 p995 -------------------------------------------------------------------------- ----------------------------- new ServeHandlerInfo 3.43 ns/iter 291,508,889.3 (3.07 ns … 12.21 ns) 3.42 ns 3.84 ns 3.87 ns {} with getter 133.84 ns/iter 7,471,528.9 (92.9 ns … 458.95 ns) 132.45 ns 364.96 ns 429.43 ns ``` ---- ### Drawbacks: `.remoteAddr` is now not enumerable ``` ServeHandlerInfo {} ``` vs ``` { remoteAddr: [Getter] } ``` It'll break any code trying to iterate through `info` keys (Doubt there's anyone doing it though) ```js Deno.serve((req, info) => { console.log(Object.keys(info).length === 0) // true; return new Response("yes"); }); |
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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.