Nomad changes

docs/snippets/wasm/advanced/worker-extraction.ts

@@ -0,0 +1,57 @@
+class ExtractionWorker {
+  private workerPool: Worker[] = [];
+  private taskQueue: Array<{
+    bytes: Uint8Array;
+    mimeType: string;
+    resolve: (value: any) => void;
+    reject: (error: any) => void;
+  }> = [];
+
+  constructor(workerCount?: number) {
+    const count =
+      workerCount ?? (typeof navigator !== "undefined" ? (navigator.hardwareConcurrency ?? 2) : 2);
+    for (let i = 0; i < count; i++) {
+      const worker = new Worker("extraction-worker.js");
+      worker.onmessage = (e) => this.handleWorkerMessage(worker, e.data);
+      worker.onerror = (e) => this.handleWorkerError(worker, e);
+      this.workerPool.push(worker);
+    }
+  }
+
+  async extract(bytes: Uint8Array, mimeType: string) {
+    return new Promise((resolve, reject) => {
+      this.taskQueue.push({ bytes, mimeType, resolve, reject });
+      this.processTasks();
+    });
+  }
+
+  private processTasks() {
+    const availableWorker = this.workerPool[0];
+    const task = this.taskQueue.shift();
+
+    if (!task || !availableWorker) return;
+
+    availableWorker.postMessage({ bytes: task.bytes, mimeType: task.mimeType });
+    this.workerPool.push(this.workerPool.shift()!);
+  }
+
+  private handleWorkerMessage(_worker: Worker, result: any) {
+    const task = this.taskQueue.shift();
+    if (task) {
+      task.resolve(result);
+      this.processTasks();
+    }
+  }
+
+  private handleWorkerError(_worker: Worker, error: any) {
+    const task = this.taskQueue.shift();
+    if (task) {
+      task.reject(error);
+      this.processTasks();
+    }
+  }
+
+  terminate() {
+    this.workerPool.forEach((w) => w.terminate());
+  }
+}