优化后端

tmp/ambient-matrix-inspect/node_modules/tesseract.js/examples/node/scheduler.js

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+'use strict';
+
+const path = require('path');
+const { createWorker, createScheduler } = require('../..');
+
+const [,, imagePath] = process.argv;
+
+// Note: This example recognizes the same image 4 times in parallel
+// to show how schedulers can be used to speed up bulk jobs.
+// In actual use you would (obviously) not want to run multiple identical jobs.
+
+const image = path.resolve(__dirname, (imagePath || '../../tests/assets/images/cosmic.png'));
+const imageArr = [image, image, image, image];
+
+const scheduler = createScheduler();
+
+// Creates worker and adds to scheduler
+const workerGen = async () => {
+  const worker = await createWorker('eng', 1, { cachePath: '.' });
+  scheduler.addWorker(worker);
+};
+
+const workerN = 4;
+(async () => {
+  const resArr = Array(workerN);
+  for (let i = 0; i < workerN; i++) {
+    resArr[i] = workerGen();
+  }
+  await Promise.all(resArr);
+
+  const resArr2 = Array(imageArr.length);
+
+  for (let i = 0; i < imageArr.length; i++) {
+    resArr2[i] = scheduler.addJob('recognize', image).then((x) => console.log(x.data.text));
+  }
+
+  await Promise.all(resArr2);
+
+  await scheduler.terminate(); // It also terminates all workers.
+})();