native-keyshare v1.1.5
native-keyshare
A high-performance shared key-value store implementation designed for multi-threaded environments. This library leverages SharedArrayBuffer
to enable efficient data sharing between worker threads.
Features
- Shared Data Access: Allows multiple worker threads to share and manipulate data using named stores
- High Performance: Optimized for fast reads and writes using TypedArrays and efficient buffer handling
- Pattern Operations: Built-in support for wildcards and regex patterns
- Simplified Communication: Uses BroadcastChannel for seamless thread communication
- No Dependencies: Core functionality works without external dependencies
- Optional msgpackr: 2-4x performance boost when using msgpackr
Prerequisites
- Node.js >= 16.0.0
- msgpackr (optional): Improves serialization/deserialization performance by 2-4x
Installation
Install the library using npm:
npm install native-keyshare
If you want to enable performance improvements, also install msgpackr
:
npm install msgpackr
Usage
Basic Operations
const { createStore } = require('native-keyshare');
// Create a named store
const store = createStore('mystore');
// Basic operations
store.set('user:1', { name: 'John' });
console.log(store.get('user:1')); // { name: 'John' }
store.delete('user:1');
// Named stores are isolated
const cacheStore = createStore('cache');
const userStore = createStore('users');
// Get same store instance
const sameStore = createStore('mystore');
Worker Thread Example
Main Thread (index.js
)
const { Worker } = require('worker_threads');
const { createStore } = require('native-keyshare');
const store = createStore('shared');
store.set('sharedKey', { value: 'Hello from main!' });
const worker1 = new Worker('./worker.js');
const worker2 = new Worker('./worker.js');
Worker Thread (worker.js
)
const { createStore } = require('native-keyshare');
const store = createStore('shared');
console.log(store.get('sharedKey')); // { value: 'Hello from main!' }
store.set('workerKey', { data: 'Hello from worker!' });
Locks
// Initialize counter - minBufferSize to reuse the same buffer even when increasing length
store.set('counter', 0, { minBufferSize: 20 });
// the following code could be executed from every thread
if (store.lock('counter')) {
try {
const x = store.get('counter', true);
store.set('counter', x + 1, { skipLock: true });
} finally {
store.release('counter');
}
}
API
Store Creation
createStore(storeName?: string)
Creates or retrieves a named key-value store instance.
const store = createStore('mystore'); // Named store
const defaultStore = createStore(); // Default store
Store Methods
set(key: string, value: any, options?: Options): boolean
Sets a key-value pair in the store.
- options.minBufferSize: Initial buffer size in bytes if you expect value to grow
- options.immutable: Dont allow rewriting the buffer. create a new one on update.
- options.ttl: TTL in seconds.
get(key: string, skipLock: boolean = false): any
Retrieves a value from the store.
delete(key: string): boolean
Deletes a value. Supports patterns.
listKeys(pattern?: string): string[]
Lists all keys, optionally filtered by pattern.
lock(key: string, timeout = 1000): boolean
Locks a key.
release(key: string): boolean
Releases a locked key.
clear(): void
Clear the store.
close(): void
Close the store. cleanup local maps and buffer references.
Pattern Operations
The store supports two pattern matching styles for delete() and listKeys():
// Glob-style wildcards
store.delete('users:*'); // Matches: users:123, users:abc, etc
store.delete('session:?'); // Matches: session:1, session:a
store.delete('cache:??'); // Matches: cache:12, cache:ab
// Regular expressions (enclosed in forward slashes)
store.delete('/^user_\d+$/'); // Matches: user_1, user_123
store.delete('/test_.+/'); // Matches: test_abc, test_123
// List keys matching patterns
const userKeys = store.listKeys('user:*');
const logKeys = store.listKeys('/log_\d+/');
Performance Tips
- Use msgpackr for better serialization (2-4x faster)
- Set appropriate minBufferSize when you know data will grow
- Batch operations when possible instead of individual calls
- Use pattern operations sparingly on large stores
Benchmarks
Performance test for get
:
const store = createStore();
store.set('test', { value: 'Benchmark' });
console.time('Benchmark');
for (let i = 0; i < 10000000; i++) {
store.get('test');
}
console.timeEnd('Benchmark');
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