@astroscope/hyperspace

Note: This package is in active development. APIs may change between versions.

Pre-compressed in-memory static file serving for Astro SSR. Save space, serve from hyperspace.

CDNs and reverse proxies often compress on the fly with conservative settings — or sometimes not at all. Hyperspace pre-compresses static files at build time with maximum brotli and gzip quality, then serves them from memory at startup. The result is smaller responses than most CDNs produce in real-time, with zero per-request CPU or disk overhead. Works great standalone or behind a proxy.

Examples

See the demo/hyperspace directory for a working example.

Installation

npm install @astroscope/hyperspace

Usage

// astro.config.ts
import { defineConfig } from 'astro/config';
import hyperspace from '@astroscope/hyperspace';

export default defineConfig({
  output: 'server',
  integrations: [hyperspace()],
});

That's it. No configuration needed.

What it does

Build time

After Astro finishes building, hyperspace walks dist/client/ and compresses every text-based static file:

• Brotli at maximum quality (level 11)
• Gzip at level 9
• Skips variants where compressed size >= original size
• Writes .br and .gz files next to originals

Compressible extensions: .html, .css, .js, .mjs, .json, .xml, .svg, .txt, .wasm, .map, .webmanifest, .xhtml

Runtime

On server startup, the middleware loads all compressible files and their pre-compressed variants. When a request comes in, it:

1. Checks if the request path matches a cached file
2. Negotiates encoding from Accept-Encoding (prefers br > gzip > raw)
3. Returns the best variant from memory with correct headers
4. Falls through to Astro for non-static requests

Headers

• Content-Encoding: br or gzip when serving compressed
• Vary: accept-encoding on all cached responses
• Cache-Control: public, immutable, max-age=31536000 for /_astro/ files (hashed filenames)

Memory footprint

Typical memory usage is modest:

| Site size (raw) | Estimated memory (raw + br + gz) | | --------------- | -------------------------------- | | 400 KB | ~600 KB | | 3 MB | ~5 MB | | 10 MB | ~15 MB |

Only text-based files are loaded. Images, fonts, and other binaries are left to Astro's default static file handling.

Dev mode

In development, there are no compressed files — the middleware gracefully no-ops and passes all requests through to Astro.

Requirements

• Node.js runtime
• SSR output mode (output: "server")

License

MIT