java.util.zip - ZipInputStream v.s. ZipFile

Question

I have some general questions regarding the java.util.zip library. What we basically do is an import and an export of many small components. Previously these c

Answer 1

I measured that just listing the files with ZipInputStream is 8 times slower than with ZipFile.

    long t = System.nanoTime();
    ZipFile zip = new ZipFile(jarFile);
    Enumeration entries = zip.entries();
    while (entries.hasMoreElements())
    {
        ZipEntry entry = entries.nextElement();

        String filename = entry.getName();
        if (!filename.startsWith(JAR_TEXTURE_PATH))
            continue;

        textureFiles.add(filename);
    }
    zip.close();
    System.out.println((System.nanoTime() - t) / 1e9);

and

    long t = System.nanoTime();
    ZipInputStream zip = new ZipInputStream(new FileInputStream(jarFile));
    ZipEntry entry;
    while ((entry = zip.getNextEntry()) != null)
    {
        String filename = entry.getName();
        if (!filename.startsWith(JAR_TEXTURE_PATH))
            continue;

        textureFiles.add(filename);
    }
    zip.close();
    System.out.println((System.nanoTime() - t) / 1e9);

(Don't run them in the same class. Make two different classes and run them separately)