Attachment #32195 for bug #57173

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package org.apache.tomcat.util.bcel;

import java.io.File;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;


    private static final String JAR_LOCATION = "/tmp/jira-libs";

    /**
     * An InputStream that returns no more than one byte on each call.
     */
    private static class SlowInputStream extends FilterInputStream {

        public SlowInputStream(InputStream in) {
            super(in);
        }

        @Override
        public int read(byte[] b, int off, int len) throws IOException {
            if (len <= 0) {
                if (len == 0) {
                    return 0;
                }
                throw new IndexOutOfBoundsException();
            }
            return super.read(b, off, 1);
        }

        @Override
        public int available() throws IOException {
            int result = super.available(); 
            return result > 0 ? 1 : result;
        }
    }

    @Test
    public void testClassParserPerformance() throws IOException {
        File libDir = new File(JAR_LOCATION);

            while (jarEntryName != null) {
                if (jarEntryName.endsWith(".class")) {
                    InputStream is = jar.getEntryInputStream();
                    is = new SlowInputStream(is);
                    long start = System.nanoTime();
                    ClassParser cp = new ClassParser(is);
                    cp.parse();

Return to bug 57173

Lines 17-22 Link Here

(-)test/org/apache/tomcat/util/bcel/TesterPerformance.java (+29 lines)
17	package org.apache.tomcat.util.bcel;	17	package org.apache.tomcat.util.bcel;
18		18
19	import java.io.File;	19	import java.io.File;
		20	import java.io.FilterInputStream;
20	import java.io.IOException;	21	import java.io.IOException;
21	import java.io.InputStream;	22	import java.io.InputStream;
22	import java.net.URL;	23	import java.net.URL;
Lines 34-39 Link Here
34		35
35	private static final String JAR_LOCATION = "/tmp/jira-libs";	36	private static final String JAR_LOCATION = "/tmp/jira-libs";
36		37
		38	/**
		39	* An InputStream that returns no more than one byte on each call.
		40	*/
		41	private static class SlowInputStream extends FilterInputStream {
		42
		43	public SlowInputStream(InputStream in) {
		44	super(in);
		45	}
		46
		47	@Override
		48	public int read(byte[] b, int off, int len) throws IOException {
		49	if (len <= 0) {
		50	if (len == 0) {
		51	return 0;
		52	}
		53	throw new IndexOutOfBoundsException();
		54	}
		55	return super.read(b, off, 1);
		56	}
		57
		58	@Override
		59	public int available() throws IOException {
		60	int result = super.available();
		61	return result > 0 ? 1 : result;
		62	}
		63	}
		64
37	@Test	65	@Test
38	public void testClassParserPerformance() throws IOException {	66	public void testClassParserPerformance() throws IOException {
39	File libDir = new File(JAR_LOCATION);	67	File libDir = new File(JAR_LOCATION);
Lines 57-62 Link Here
57	while (jarEntryName != null) {	85	while (jarEntryName != null) {
58	if (jarEntryName.endsWith(".class")) {	86	if (jarEntryName.endsWith(".class")) {
59	InputStream is = jar.getEntryInputStream();	87	InputStream is = jar.getEntryInputStream();
		88	is = new SlowInputStream(is);
60	long start = System.nanoTime();	89	long start = System.nanoTime();
61	ClassParser cp = new ClassParser(is);	90	ClassParser cp = new ClassParser(is);
62	cp.parse();	91	cp.parse();