Optimize renderer

client/chunk_workers.ts

@@ -0,0 +1,39 @@
+import type { FromChunkWorker, ToChunkWorker } from "./workers/chunk_messages.ts";
+
+// leave a core for the main thread, more than 4 doesnt help much
+const POOL_SIZE = Math.max(1, Math.min(4, (navigator.hardwareConcurrency ?? 4) - 1));
+
+export class ChunkWorkerPool {
+	readonly size = POOL_SIZE;
+	#workers: Worker[] = [];
+	#next = 0;
+
+	constructor(on_message: (message: FromChunkWorker) => void) {
+		for (let i = 0; i < this.size; i += 1) {
+			const worker = new Worker(new URL("./workers/chunk_worker.js", import.meta.url), { type: "module" });
+			worker.onmessage = (event: MessageEvent<FromChunkWorker>) => on_message(event.data);
+			worker.onerror = (event) => console.error("Chunk worker error:", event.message);
+			this.#workers.push(worker);
+		}
+	}
+
+	broadcast(message: ToChunkWorker) {
+		for (const worker of this.#workers) {
+			worker.postMessage(message);
+		}
+	}
+
+	// round robin, results can come back out of order
+	post(message: ToChunkWorker, transfer: Transferable[] = []) {
+		const worker = this.#workers[this.#next];
+		this.#next = (this.#next + 1) % this.#workers.length;
+		worker.postMessage(message, transfer);
+	}
+
+	terminate() {
+		for (const worker of this.#workers) {
+			worker.terminate();
+		}
+		this.#workers = [];
+	}
+}