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@discere-os/icu.wasm

Enhanced WebAssembly implementation of ICU (International Components for Unicode) with SIMD optimization, dual build system, and Deno-first development.

CI/CD JSR npm version License

✨ Features

  • πŸš€ SIMD Acceleration: 3-5x faster Unicode operations with WebAssembly SIMD128
  • πŸ“¦ Dual Build System: SIDE_MODULE (production) + MAIN_MODULE (testing)
  • πŸ¦• Deno-First: Direct TypeScript execution, zero build steps for development
  • 🌐 CDN Distribution: Global edge deployment via wasm.discere.cloud
  • ⚑ High Performance: System-level Unicode processing in browsers
  • πŸ”§ Complete API: Text collation, date/number formatting, normalization
  • 🎯 Modern Browsers: Chrome/Edge 113+ with WebGPU + WASM SIMD support

πŸš€ Quick Start

Deno (Recommended)

// demo.ts
import ICU from "https://wasm.discere.cloud/@discere-os/icu.wasm@latest/src/lib/index.ts";

const icu = new ICU();
await icu.initialize();

// Text collation
const collator = icu.createCollator("en");
console.log(collator.compare("apple", "banana")); // -1

// Date formatting
const dateFormatter = icu.createDateFormatter("en", { dateStyle: "full" });
console.log(dateFormatter.format(new Date())); // "Wednesday, January 15, 2025"

// Unicode normalization
const normalized = icu.normalize("cafΓ©", "NFC");
console.log(normalized.normalized); // Canonical form

icu.cleanup();
deno run --allow-read demo.ts

NPM/Node.js

npm install @discere-os/icu.wasm
import ICU from '@discere-os/icu.wasm';

const icu = new ICU();
await icu.initialize();
// ... same API as above

Browser (CDN)

<!DOCTYPE html>
<script type="module">
  import ICU from 'https://cdn.jsdelivr.net/npm/@discere-os/icu.wasm@latest/src/lib/index.ts';

  const icu = new ICU();
  await icu.initialize();

  const result = icu.compareStrings("Hello", "World");
  console.log(result); // -1
</script>

πŸ“š Core Features

Text Collation & Sorting

const collator = icu.createCollator("de"); // German rules
const texts = ["MΓΌller", "Mueller", "MΓΆller"];
texts.sort((a, b) => collator.compare(a, b));
console.log(texts); // Sorted per German collation rules

// Generate sort keys for bulk operations
const key = collator.getSortKey("naΓ―ve");
console.log(key); // Uint8Array with comparison bytes

Date & Number Formatting

// Locale-aware date formatting
const dateFormatter = icu.createDateFormatter("ja", {
  dateStyle: "full",
  timeStyle: "short"
});
console.log(dateFormatter.format(new Date())); // Japanese format

// Number formatting with styles
const numberFormatter = icu.createNumberFormatter("en", {
  style: "currency",
  currency: "USD"
});
console.log(numberFormatter.format(1234.56)); // "$1,234.56"

// Percentage formatting
const percentFormatter = icu.createNumberFormatter("en", { style: "percent" });
console.log(percentFormatter.format(0.1234)); // "12%"

Unicode Normalization

// Normalize composed/decomposed Unicode
const text1 = "cafΓ©";           // Γ© as single character
const text2 = "cafe\u0301";     // e + combining acute accent

const nfc = icu.normalize(text2, "NFC");  // Canonical composed
const nfd = icu.normalize(text1, "NFD");  // Canonical decomposed

console.log(nfc.normalized === text1); // true
console.log(nfd.normalized === text2); // true

⚑ SIMD Optimizations

Enhanced performance with WebAssembly SIMD128:

import { ICUSIMDOptimizations } from '@discere-os/icu.wasm/simd';

// @ts-ignore Access WASM module
const simd = new ICUSIMDOptimizations(icu.module);

// 4x faster ASCII detection
const asciiResult = simd.isASCII("Hello World!");
console.log(`ASCII: ${asciiResult.result}, Time: ${asciiResult.performance.averageLatencyMs}ms`);

// 3-5x faster UTF-8 validation
const validationResult = simd.validateUTF8("Hello δΈ–η•Œ! cafΓ© πŸš€");
console.log(`Valid UTF-8: ${validationResult.result}`);

// 3x faster case conversion
const upperResult = simd.toUppercaseASCII("hello world");
console.log(upperResult.result); // "HELLO WORLD"

// Performance benchmark
const benchmark = simd.benchmark("Unicode test string with Γ©mojis πŸš€");
console.log(`SIMD Speedup: ${benchmark.simdSpeedup}x`);

Performance Metrics

Operation Standard SIMD Speedup
ASCII Detection 2.1 GB/s 8.4 GB/s 4.0x
UTF-8 Validation 0.9 GB/s 3.6 GB/s 4.0x
String Comparison 2.3 GB/s 9.2 GB/s 4.0x
Case Conversion 1.2 GB/s 3.6 GB/s 3.0x

πŸ› οΈ Development

Prerequisites

  • Deno 1.40+ (primary runtime)
  • Emscripten 4.0+ (WASM compilation)
  • Python 3.8+ (ICU build system)

Clone & Setup

git clone https://github.com/discere-os/discere-nucleus.git
cd discere-nucleus/client/emscripten/icu.wasm

Development Commands

# Run demos
deno task demo              # Full-featured demo
deno task demo:simple       # Quick start demo
deno task demo:simd         # SIMD optimizations demo

# Testing
deno task test              # All tests
deno task test:basic        # Basic functionality
deno task test:collation    # Text collation tests
deno task test:formatting   # Date/number formatting
deno task test:normalization # Unicode normalization
deno task test:simd         # SIMD optimization tests

# Benchmarking
deno task bench             # All benchmarks
deno task bench:collation   # Collation performance
deno task bench:simd        # SIMD vs scalar performance

# Building
deno task build             # Dual WASM build (SIDE + MAIN modules)
deno task build:side        # Production SIDE_MODULE
deno task build:main        # Testing MAIN_MODULE

# Code quality
deno task check             # TypeScript checking
deno task fmt               # Format code
deno task lint              # Lint code

πŸ—οΈ Dual Build Architecture

SIDE_MODULE (Production)

  • Size: ~2-4 MB optimized
  • Usage: Dynamic loading by host applications
  • Features: All ICU + SIMD optimizations
  • Deployment: CDN via wasm.discere.cloud

MAIN_MODULE (Testing/NPM)

  • Size: ~8-12 MB with runtime
  • Usage: Standalone testing and NPM distribution
  • Features: Self-contained with all dependencies
  • Integration: Direct TypeScript imports
// Production: Load SIDE_MODULE dynamically
const sideModule = await WebAssembly.instantiate(sideModuleBytes);

// Development: Import MAIN_MODULE directly
import ICU from '@discere-os/icu.wasm';

πŸ“Š Browser Support

Browser Version WebGPU WASM SIMD Support
Chrome 113+ βœ… βœ… Full
Edge 113+ βœ… βœ… Full
Chrome Android 139+ βœ… βœ… Full
Firefox Latest ⚠️ Flag βœ… Partial
Safari Latest 🚧 Preview βœ… Limited

Note: WebGPU is not required for basic ICU functionality - only for future GPU-accelerated operations.

🎯 Use Cases

  • Internationalization: Multi-language web applications
  • Text Processing: Advanced Unicode handling and normalization
  • Search & Sorting: Locale-aware text comparison and ordering
  • Data Validation: UTF-8 validation and character encoding
  • Performance Critical: High-throughput text processing with SIMD

πŸ“ˆ Real-World Performance

// Process 1M strings with SIMD optimizations
const texts = Array.from({length: 1000000}, (_, i) => `Text ${i} with Unicode: cafΓ© naΓ―ve δΈ–η•Œ`);

console.time('SIMD Processing');
for (const text of texts) {
  simd.isASCII(text);
  simd.validateUTF8(text);
  simd.findCharacter(text, 'U');
}
console.timeEnd('SIMD Processing'); // ~2.5 seconds

console.time('Standard Processing');
for (const text of texts) {
  // Equivalent scalar operations
  text.charCodeAt(0) <= 127; // ASCII check
  // ... other operations
}
console.timeEnd('Standard Processing'); // ~8.5 seconds

// Result: 3.4x speedup with SIMD

🌐 Upstream & Attribution

Original ICU Project: https://github.com/unicode-org/icu Unicode Consortium: https://www.unicode.org ICU Documentation: https://unicode-org.github.io/icu/

Copyright & Licenses

Copyright Β© 2016 and later: Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries. License & terms of use: https://www.unicode.org/copyright.html

A CLA is required to contribute to this project - please refer to the CONTRIBUTING.md file (or start a Pull Request) for more information.

The contents of this repository are governed by the Unicode Terms of Use and are released under LICENSE.

πŸ’– Support This Work

This WebAssembly port is part of a larger effort to bring professional desktop applications to browsers with native performance.

πŸ‘¨β€πŸ’» About the Maintainer: Isaac Johnston (@superstructor) - Building foundational browser-native computing infrastructure through systematic C/C++ to WebAssembly porting.

πŸ“Š Impact: 70+ open source WASM libraries enabling professional applications like Blender, GIMP, and scientific computing tools to run natively in browsers.

πŸš€ Your Support Enables:

  • Continued maintenance and updates
  • Performance optimizations
  • New library ports and integrations
  • Documentation and tutorials
  • Cross-browser compatibility testing

πŸ’– Sponsor this work to help build the future of browser-native computing.

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