liu created PDFBOX-5846:
---------------------------
Summary: A PDF with 5.3 million xref data, performance comparison
between pdfbox3 and itextpdf.
Key: PDFBOX-5846
URL: https://issues.apache.org/jira/browse/PDFBOX-5846
Project: PDFBox
Issue Type: Improvement
Components: Rendering
Affects Versions: 3.0.2 PDFBox
Reporter: liu
Attachments: 66.7z, image-2024-06-28-15-49-33-885.png,
image-2024-06-28-15-50-36-240.png, image-2024-06-28-15-57-49-634.png,
image-2024-06-28-16-00-39-424.png
There is a pdf in this compressed file.
[^66.zip]
Test comparison code
{code:java}
//代码占位符
package net.qiyuesuo.common.pdf;
import com.itextpdf.text.pdf.PdfReader;
import org.apache.pdfbox.Loader;
import org.apache.pdfbox.io.IOUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import java.io.File;
/**
* @author :
* @description :
* @date :
*/
public class Test6 {
private static void pdfbox3() throws Throwable{
long l = System.currentTimeMillis();
File file = new File("C:\\Users\\LYCIT\\Downloads\\66.pdf");
PDDocument pdf = Loader.loadPDF(file,
IOUtils.createTempFileOnlyStreamCache());
System.out.println("loadPDF time："+ (System.currentTimeMillis() - l));
Thread.sleep(36000000);
}
public static void itextpdf() throws Throwable {
long l = System.currentTimeMillis();
String file = "C:\\Users\\LYCIT\\Downloads\\66.pdf";
final PdfReader pdfReader = new PdfReader(file, null, true);
System.out.println("loadPDF time："+ (System.currentTimeMillis() - l));
Thread.sleep(36000000);
}
public static void main(String[] args) throws Throwable {
pdfbox3();
// itextpdf();
}
}
{code}
Load time：
pdfbox3：10233 ms.
itextpdf：925 ms.
Memory usage：
pdfbox3：790M.
!image-2024-06-28-15-49-33-885.png|width=312,height=151!
itextpdf：106M.
!image-2024-06-28-15-50-36-240.png|width=307,height=166!
Detailed memory usage：
pdfbox3：xrefTable and keyCache.
!image-2024-06-28-15-57-49-634.png|width=307,height=200!
itextpdf：xref and xrefObj.
!image-2024-06-28-16-00-39-424.png|width=311,height=203!
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