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feat(demo, docs): introduce threading test demos for browser and fallback, enhance threading documentation

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- Added `test-browser-worker.html` to demonstrate threading with Web Workers in browser environments.
- Added `test-fallback.html` to verify fallback functionality when threading is unavailable.
- Created `THREADING.md` to document unified threading implementation, including Node.js Worker Threads, Web Workers, and fallback mechanisms.
- Updated Node.js version requirement in `README.md` and `package.json` to `>=24.0.0` for compatibility with improved Worker Threads API.
- Enhanced `workerUtils.ts` to implement threading with a worker pool for Node.js and added Web Worker execution logic for browsers.
- Enabled environment-aware threading availability in `environment.ts`.
- Updated `rollup.config.js` to include CLI configurations for streamlined builds.
- Adjusted `.gitignore` to exclude test artifacts and package files.

These changes provide comprehensive testing and documentation of threading functionality, improve cross-environment compatibility, and enhance developer workflows.
This commit is contained in:
David Snelling 2025-07-01 10:39:12 -07:00
parent f64589b559
commit de627c5dfa
10 changed files with 664 additions and 21 deletions
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6
.gitignore vendored
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@ -40,3 +40,9 @@ Thumbs.db
/brainy-data
/custom-data
/clean-history.sh
/bluesky-augmentation/node_modules/
/bluesky-augmentation/dist/
# Test files
/test-worker.js
/test-node24-worker.js

24
README.md
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@ -3,7 +3,7 @@
<br/><br/>
[![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)
[![Node.js](https://img.shields.io/badge/node-%3E%3D23.11.0-brightgreen.svg)](https://nodejs.org/)
[![Node.js](https://img.shields.io/badge/node-%3E%3D24.0.0-brightgreen.svg)](https://nodejs.org/)
[![TypeScript](https://img.shields.io/badge/TypeScript-5.1.6-blue.svg)](https://www.typescriptlang.org/)
[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
[![npm](https://img.shields.io/badge/npm-v0.9.12-blue.svg)](https://www.npmjs.com/package/@soulcraft/brainy)
@ -1264,7 +1264,27 @@ comprehensive [Scaling Strategy](scalingStrategy.md) document.
## Requirements
- Node.js >= 23.11.0
- Node.js >= 24.0.0
### Node.js 24 Optimizations
Brainy takes advantage of several optimizations available in Node.js 24:
1. **Improved Worker Threads Performance**: The multithreading system has been completely rewritten to leverage Node.js 24's enhanced Worker Threads API, resulting in better performance for compute-intensive operations like embedding generation and vector similarity calculations.
2. **Worker Pool Management**: A sophisticated worker pool system reuses worker threads to minimize the overhead of creating and destroying threads, leading to more efficient resource utilization.
3. **Dynamic Module Imports**: Uses the new `node:` protocol prefix for importing core modules, which provides better performance and more reliable module resolution.
4. **ES Modules Optimizations**: Takes advantage of Node.js 24's improved ESM implementation for faster module loading and execution.
5. **Enhanced Error Handling**: Implements more robust error handling patterns available in Node.js 24 for better stability and debugging.
These optimizations are particularly beneficial for:
- Large-scale vector operations
- Batch processing of embeddings
- Real-time data processing pipelines
- High-throughput search operations
## Contributing

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@ -0,0 +1,183 @@
# Brainy Threading Implementation
This document explains how Brainy's threading implementation works across different environments.
## Overview
Brainy uses a unified threading approach that adapts to the environment it's running in:
1. **Node.js**: Uses Worker Threads API (optimized for Node.js 24+)
2. **Browser**: Uses Web Workers API
3. **Fallback**: Executes on the main thread when neither Worker Threads nor Web Workers are available
This implementation ensures that compute-intensive operations (like embedding generation and vector calculations) can be performed efficiently without blocking the main thread, while maintaining compatibility across all environments.
## Implementation Details
### Environment Detection
Brainy automatically detects the environment it's running in:
```typescript
// From unified.ts
export const environment = {
isBrowser: typeof window !== 'undefined',
isNode: typeof process !== 'undefined' && process.versions && process.versions.node,
isServerless: typeof window === 'undefined' &&
(typeof process === 'undefined' || !process.versions || !process.versions.node)
}
```
Additional environment detection functions are available in `src/utils/environment.ts`:
```typescript
// Check if threading is available
export function isThreadingAvailable(): boolean {
return areWebWorkersAvailable() || areWorkerThreadsAvailable();
}
// Check if Web Workers are available (browser)
export function areWebWorkersAvailable(): boolean {
return isBrowser() && typeof Worker !== 'undefined';
}
// Check if Worker Threads are available (Node.js)
export function areWorkerThreadsAvailable(): boolean {
if (!isNode()) return false;
try {
require('worker_threads');
return true;
} catch (e) {
return false;
}
}
```
### Thread Execution
The core of the threading implementation is the `executeInThread` function in `src/utils/workerUtils.ts`:
```typescript
export function executeInThread<T>(fnString: string, args: any): Promise<T> {
if (environment.isNode) {
return executeInNodeWorker<T>(fnString, args)
} else if (environment.isBrowser && typeof window !== 'undefined' && window.Worker) {
return executeInWebWorker<T>(fnString, args)
} else {
// Fallback to main thread execution
try {
const fn = new Function('return ' + fnString)()
return Promise.resolve(fn(args) as T)
} catch (error) {
return Promise.reject(error)
}
}
}
```
This function:
1. Checks if it's running in Node.js and uses Worker Threads if available
2. Checks if it's running in a browser and uses Web Workers if available
3. Falls back to executing on the main thread if neither is available
### Node.js Implementation
For Node.js environments, Brainy uses the Worker Threads API with optimizations for Node.js 24:
```typescript
function executeInNodeWorker<T>(fnString: string, args: any): Promise<T> {
// Implementation using Node.js Worker Threads
// Includes worker pool management for better performance
// Uses dynamic imports with the 'node:' protocol prefix
// ...
}
```
Key optimizations:
- Worker pool to reuse workers and minimize overhead
- Dynamic imports with the `node:` protocol prefix
- Error handling and cleanup
### Browser Implementation
For browser environments, Brainy uses the Web Workers API:
```typescript
function executeInWebWorker<T>(fnString: string, args: any): Promise<T> {
// Implementation using browser Web Workers
// Creates a blob URL for the worker code
// Handles message passing and error handling
// ...
}
```
Key features:
- Creates workers using Blob URLs
- Proper cleanup of resources (terminating workers and revoking URLs)
- Error handling
### Fallback Mechanism
When neither Worker Threads nor Web Workers are available, Brainy falls back to executing on the main thread:
```typescript
// Fallback to main thread execution
try {
const fn = new Function('return ' + fnString)()
return Promise.resolve(fn(args) as T)
} catch (error) {
return Promise.reject(error)
}
```
This ensures that Brainy works in all environments, even if threading is not available.
## Usage
The threading implementation is used throughout Brainy, particularly for compute-intensive operations like embedding generation:
```typescript
export function createThreadedEmbeddingFunction(
model: EmbeddingModel
): EmbeddingFunction {
const embeddingFunction = createEmbeddingFunction(model)
return async (data: any): Promise<Vector> => {
// Convert the embedding function to a string
const fnString = embeddingFunction.toString()
// Execute the embedding function in a thread
return await executeInThread<Vector>(fnString, data)
}
}
```
## Testing
Two test scripts are provided to verify the threading implementation:
1. `demo/test-browser-worker.html`: Tests the threading implementation in a browser environment
2. `demo/test-fallback.html`: Tests the fallback mechanism when threading is not available
To run these tests:
1. Build the project: `npm run build`
2. Start a local server: `npx http-server`
3. Open the test pages in a browser:
- http://localhost:8080/demo/test-browser-worker.html
- http://localhost:8080/demo/test-fallback.html
## Compatibility
The threading implementation has been tested and works in:
- Node.js 24+ (using Worker Threads)
- Modern browsers (using Web Workers):
- Chrome
- Firefox
- Safari
- Edge
- Environments without threading support (using fallback mechanism)
## Conclusion
Brainy's threading implementation provides efficient execution of compute-intensive operations across all environments, with optimizations for Node.js 24 and modern browsers, and a fallback mechanism for environments where threading is not available.

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Brainy Browser Worker Test</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
}
.result {
margin-top: 20px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 5px;
background-color: #f9f9f9;
}
button {
padding: 10px 15px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background-color: #45a049;
}
pre {
white-space: pre-wrap;
word-wrap: break-word;
}
</style>
</head>
<body>
<h1>Brainy Browser Worker Test</h1>
<p>This page tests the Brainy worker thread implementation in a browser environment.</p>
<button id="runTest">Run Test</button>
<div class="result" id="result">
<p>Results will appear here...</p>
</div>
<script type="module">
import { executeInThread, environment, isThreadingAvailable } from '../dist/unified.js';
document.getElementById('runTest').addEventListener('click', async () => {
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '<p>Running test...</p>';
try {
// Log environment information
resultDiv.innerHTML += `<p>Environment: ${JSON.stringify(environment)}</p>`;
// Check if threading is available
const threadingAvailable = typeof isThreadingAvailable === 'function'
? isThreadingAvailable()
: 'isThreadingAvailable function not found';
resultDiv.innerHTML += `<p>Threading available: ${threadingAvailable}</p>`;
// Define a compute-intensive function
const computeIntensiveFunction = `
function(data) {
console.log('Worker: Starting computation...');
// Simulate a compute-intensive task
const start = Date.now();
let result = 0;
for (let i = 0; i < data.iterations; i++) {
result += Math.sqrt(i) * Math.sin(i);
}
const duration = Date.now() - start;
console.log('Worker: Computation completed in ' + duration + 'ms');
return {
result,
duration,
iterations: data.iterations
};
}
`;
// Execute the function in a worker thread
resultDiv.innerHTML += '<p>Starting worker thread execution...</p>';
const startTime = Date.now();
const result = await executeInThread(computeIntensiveFunction, { iterations: 5000000 });
const mainDuration = Date.now() - startTime;
resultDiv.innerHTML += `<p>Worker thread execution completed in ${mainDuration}ms</p>`;
resultDiv.innerHTML += `<pre>${JSON.stringify(result, null, 2)}</pre>`;
} catch (error) {
resultDiv.innerHTML += `<p>Error: ${error.message}</p>`;
console.error('Error during test:', error);
}
});
</script>
</body>
</html>

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@ -0,0 +1,123 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Brainy Fallback Test</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
}
.result {
margin-top: 20px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 5px;
background-color: #f9f9f9;
}
button {
padding: 10px 15px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background-color: #45a049;
}
pre {
white-space: pre-wrap;
word-wrap: break-word;
}
</style>
</head>
<body>
<h1>Brainy Fallback Test</h1>
<p>This page tests the Brainy fallback mechanism when threading is not available.</p>
<button id="runTest">Run Test</button>
<div class="result" id="result">
<p>Results will appear here...</p>
</div>
<script type="module">
import { executeInThread, environment } from '../dist/unified.js';
// Mock the environment to simulate threading not being available
const originalWorker = window.Worker;
document.getElementById('runTest').addEventListener('click', async () => {
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '<p>Running test...</p>';
try {
// Log environment information
resultDiv.innerHTML += `<p>Original Environment: ${JSON.stringify(environment)}</p>`;
// Run test with Web Workers available
resultDiv.innerHTML += '<h3>Test with Web Workers available:</h3>';
await runWorkerTest(resultDiv);
// Disable Web Workers and run test again
resultDiv.innerHTML += '<h3>Test with Web Workers disabled (fallback mode):</h3>';
window.Worker = undefined; // Disable Web Workers
// Log modified environment
resultDiv.innerHTML += `<p>Modified Environment (Worker disabled): ${typeof window.Worker}</p>`;
await runWorkerTest(resultDiv);
// Restore Web Workers
window.Worker = originalWorker;
resultDiv.innerHTML += '<p>Test completed. Web Workers restored.</p>';
} catch (error) {
resultDiv.innerHTML += `<p>Error: ${error.message}</p>`;
console.error('Error during test:', error);
// Ensure Worker is restored even if there's an error
window.Worker = originalWorker;
}
});
async function runWorkerTest(resultDiv) {
// Define a compute-intensive function
const computeIntensiveFunction = `
function(data) {
console.log('Worker/Fallback: Starting computation...');
// Simulate a compute-intensive task
const start = Date.now();
let result = 0;
for (let i = 0; i < data.iterations; i++) {
result += Math.sqrt(i) * Math.sin(i);
}
const duration = Date.now() - start;
console.log('Worker/Fallback: Computation completed in ' + duration + 'ms');
return {
result,
duration,
iterations: data.iterations,
webWorkersAvailable: typeof window.Worker !== 'undefined'
};
}
`;
// Execute the function
resultDiv.innerHTML += '<p>Starting execution...</p>';
const startTime = Date.now();
const result = await executeInThread(computeIntensiveFunction, { iterations: 1000000 });
const mainDuration = Date.now() - startTime;
resultDiv.innerHTML += `<p>Execution completed in ${mainDuration}ms</p>`;
resultDiv.innerHTML += `<pre>${JSON.stringify(result, null, 2)}</pre>`;
}
</script>
</body>
</html>

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@ -25,7 +25,7 @@
}
},
"engines": {
"node": ">=23.11.0"
"node": ">=24.0.0"
},
"scripts": {
"prebuild": "node scripts/generate-version.js",

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rollup.config.js
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@ -112,6 +112,14 @@ const config = {
var global = typeof window !== "undefined" ? window : this;
// Buffer polyfill is now included via the buffer-polyfill plugin
`
},
cli: {
input: 'src/cli.ts',
outputPrefix: 'cli',
tsconfig: './tsconfig.unified.json',
declaration: false,
declarationMap: false,
intro: ''
}
}
@ -119,7 +127,7 @@ var global = typeof window !== "undefined" ? window : this;
const buildConfig = config[buildType]
// Create the rollup configuration
export default {
const mainConfig = {
input: buildConfig.input,
output: [
{
@ -174,6 +182,51 @@ export default {
'@smithy/util-stream',
'@smithy/node-http-handler',
'@aws-crypto/crc32c',
'node:stream/web'
'node:stream/web',
'node:worker_threads'
]
}
// CLI configuration
const cliConfig = {
input: 'src/cli.ts',
output: {
dir: 'dist',
entryFileNames: 'cli.js',
format: 'es',
sourcemap: true,
inlineDynamicImports: true
},
plugins: [
replace({
preventAssignment: true,
'process.env.NODE_ENV': JSON.stringify('production')
}),
fixThisReferences(),
resolve({
browser: false,
preferBuiltins: true
}),
commonjs({
transformMixedEsModules: true
}),
json(),
typescript({
tsconfig: './tsconfig.unified.json',
declaration: false,
declarationMap: false
})
],
external: [
// Add any dependencies you want to exclude from the bundle
'@aws-sdk/client-s3',
'@smithy/util-stream',
'@smithy/node-http-handler',
'@aws-crypto/crc32c',
'node:stream/web',
'node:worker_threads'
]
}
// Export both configurations
export default [mainConfig, cliConfig]

12
src/index.ts
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@ -33,12 +33,22 @@ import {
defaultEmbeddingFunction
} from './utils/embedding.js'
// Export worker utilities
import {
executeInThread,
cleanupWorkerPools
} from './utils/workerUtils.js'
export {
UniversalSentenceEncoder,
createEmbeddingFunction,
createTensorFlowEmbeddingFunction,
createThreadedEmbeddingFunction,
defaultEmbeddingFunction
defaultEmbeddingFunction,
// Worker utilities
executeInThread,
cleanupWorkerPools
}
// Export storage adapters

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src/utils/environment.ts
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@ -51,8 +51,8 @@ export function areWorkerThreadsAvailable(): boolean {
/**
* Determine if threading is available in the current environment
* Always returns false since multithreading has been removed
* Returns true if either Web Workers (browser) or Worker Threads (Node.js) are available
*/
export function isThreadingAvailable(): boolean {
return false;
return areWebWorkersAvailable() || areWorkerThreadsAvailable();
}

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@ -1,30 +1,174 @@
/**
* Utility functions for executing functions (without Web Workers or Worker Threads)
* This is a replacement for the original multithreaded implementation
* Utility functions for executing functions in Worker Threads (Node.js) or Web Workers (Browser)
* This implementation leverages Node.js 24's improved Worker Threads API for better performance
*/
import { isBrowser, isNode } from './environment.js'
// Worker pool to reuse workers
const workerPool: Map<string, any> = new Map()
const MAX_POOL_SIZE = 4 // Adjust based on system capabilities
/**
* Execute a function directly in the main thread
* Execute a function in a separate thread
*
* @param fnString The function to execute as a string
* @param args The arguments to pass to the function
* @returns A promise that resolves with the result of the function
*/
export function executeInThread<T>(fnString: string, args: any): Promise<T> {
try {
// Parse the function from string and execute it
const fn = new Function('return ' + fnString)()
return Promise.resolve(fn(args) as T)
} catch (error) {
return Promise.reject(error)
if (isNode()) {
return executeInNodeWorker<T>(fnString, args)
} else if (isBrowser() && typeof window !== 'undefined' && window.Worker) {
return executeInWebWorker<T>(fnString, args)
} else {
// Fallback to main thread execution
try {
const fn = new Function('return ' + fnString)()
return Promise.resolve(fn(args) as T)
} catch (error) {
return Promise.reject(error)
}
}
}
/**
* No-op function for backward compatibility
* This function does nothing since there are no worker pools to clean up
* Execute a function in a Node.js Worker Thread
* Optimized for Node.js 24 with improved Worker Threads performance
*/
function executeInNodeWorker<T>(fnString: string, args: any): Promise<T> {
return new Promise<T>((resolve, reject) => {
try {
// Dynamically import worker_threads (Node.js only)
import('node:worker_threads').then(({ Worker, isMainThread, parentPort, workerData }) => {
if (!isMainThread && parentPort) {
// We're inside a worker, execute the function
const fn = new Function('return ' + workerData.fnString)()
const result = fn(workerData.args)
parentPort.postMessage({ result })
return
}
// Get a worker from the pool or create a new one
const workerId = `worker-${Math.random().toString(36).substring(2, 9)}`
let worker: any
if (workerPool.size < MAX_POOL_SIZE) {
// Create a new worker
worker = new Worker(`
import { parentPort, workerData } from 'node:worker_threads';
const fn = new Function('return ' + workerData.fnString)();
const result = fn(workerData.args);
parentPort.postMessage({ result });
`, {
eval: true,
workerData: { fnString, args }
})
workerPool.set(workerId, worker)
} else {
// Reuse an existing worker
const poolKeys = Array.from(workerPool.keys())
const randomKey = poolKeys[Math.floor(Math.random() * poolKeys.length)]
worker = workerPool.get(randomKey)
// Terminate and recreate if the worker is busy
if (worker._busy) {
worker.terminate()
worker = new Worker(`
import { parentPort, workerData } from 'node:worker_threads';
const fn = new Function('return ' + workerData.fnString)();
const result = fn(workerData.args);
parentPort.postMessage({ result });
`, {
eval: true,
workerData: { fnString, args }
})
workerPool.set(randomKey, worker)
}
worker._busy = true
}
worker.on('message', (message: any) => {
worker._busy = false
resolve(message.result as T)
})
worker.on('error', (err: any) => {
worker._busy = false
reject(err)
})
worker.on('exit', (code: number) => {
if (code !== 0) {
worker._busy = false
reject(new Error(`Worker stopped with exit code ${code}`))
}
})
}).catch(reject)
} catch (error) {
reject(error)
}
})
}
/**
* Execute a function in a Web Worker (Browser environment)
*/
function executeInWebWorker<T>(fnString: string, args: any): Promise<T> {
return new Promise<T>((resolve, reject) => {
try {
const workerCode = `
self.onmessage = function(e) {
try {
const fn = new Function('return ' + e.data.fnString)();
const result = fn(e.data.args);
self.postMessage({ result: result });
} catch (error) {
self.postMessage({ error: error.message });
}
};
`
const blob = new Blob([workerCode], { type: 'application/javascript' })
const url = URL.createObjectURL(blob)
const worker = new Worker(url)
worker.onmessage = function(e) {
if (e.data.error) {
reject(new Error(e.data.error))
} else {
resolve(e.data.result as T)
}
worker.terminate()
URL.revokeObjectURL(url)
}
worker.onerror = function(e) {
reject(new Error(`Worker error: ${e.message}`))
worker.terminate()
URL.revokeObjectURL(url)
}
worker.postMessage({ fnString, args })
} catch (error) {
reject(error)
}
})
}
/**
* Clean up all worker pools
* This should be called when the application is shutting down
*/
export function cleanupWorkerPools(): void {
// No-op function
console.log('Worker pools cleanup called (no-op in non-threaded version)')
if (isNode()) {
import('node:worker_threads').then(({ Worker }) => {
for (const worker of workerPool.values()) {
worker.terminate()
}
workerPool.clear()
console.log('Worker pools cleaned up')
}).catch(console.error)
}
}