tess4j: Bad performance compared with direct use of Tesseract

Hi, I’m getting a bad performance using Tess4j in comparision with a direct use of Tesseract in the same machine and same resources.

I’m using Tess4j-5.1.1 and I have Tesseract v5.0.0-alpha.20210811 installed on my pc (Windows 10 - i7-7600U CPU @ 2.80GHz 2.90 GHz - 16GB RAM)

Here you have what I’m doing:

public static void main(String[ ] args) throws Exception {
		long t0, tf;

		File scannedPdf = new File("C:\\Users\\francesc.sola\\Desktop\\work_tesseract\\1_page.jpg");
		ITesseract instance = new Tesseract();  // JNA Interface Mapping
        //ITesseract instance = new Tesseract1(); // JNA Direct Mapping

        System.out.println("Using Tess4j-5.1.1");
		t0 = System.currentTimeMillis();
		instance.doOCR(scannedPdf);
		tf = System.currentTimeMillis();
		System.out.println("Process time: " + (tf - t0) + " ms.");

		System.out.println("Direct call to tesseract v5.0.0-alpha.20210811");
		String command = "tesseract.exe C:\\Users\\francesc.sola\\Desktop\\work_tesseract\\1_page.jpg C:\\Users\\francesc.sola\\Desktop\\work_tesseract\\out";

		// Running the above command
		Runtime run = Runtime.getRuntime();
		t0 = System.currentTimeMillis();
		Process proc = run.exec(command);
		proc.waitFor();
		tf = System.currentTimeMillis();

		System.out.println("Process time: " + (tf - t0) + " ms.");
		run.exit(0);
	}

And here you have the output:

Using Tess4j-5.1.1
Process time: 11010 ms.
Direct call to tesseract v5.0.0-alpha.20210811
Process time: 6589 ms.

As you can see, the use of Tess4j is incrementing considerably the time of process in comparison of direct call to Tesseract.

Any ideas about this behaviour? I attached the image what I’m testing

Thanks!