351 lines
12 KiB
Java
351 lines
12 KiB
Java
/**
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*******************************************************************************
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* Copyright (C) 1996-2001, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*
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* $Source: /xsrl/Nsvn/icu/unicodetools/com/ibm/text/UCD/CheckCollator.java,v $
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* $Date: 2002/08/08 15:35:01 $
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* $Revision: 1.1 $
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*
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*******************************************************************************
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*/
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// http://java.sun.com/j2se/1.3/docs/guide/intl/encoding.doc.html
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package com.ibm.text.UCD;
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import java.util.*;
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import java.io.*;
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import java.text.NumberFormat;
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import com.ibm.text.utility.*;
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import com.ibm.icu.text.UTF16;
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import com.ibm.icu.text.UnicodeSet;
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/**
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* This is a quick and dirty program to get some idea of collation performance, comparing old Java to new stuff.
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*/
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abstract public class CheckCollator {
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static final String PREFIX = "C:\\ICUInternal\\icu4c\\collation-perf-data\\TestNames_";
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static final boolean DO_RAW = false;
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static final NumberFormat nf = NumberFormat.getInstance();
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static final NumberFormat percent = NumberFormat.getPercentInstance();
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static {
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nf.setMaximumFractionDigits(2);
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}
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public static void main(String[] args) throws IOException {
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// later, drive off of args
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// choices are: Asian, Chinese, Japanese, Japanese_h, Japanese_k, Korean, Latin, Russian, Thai
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test(Locale.KOREAN, "Korean");
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test(Locale.ENGLISH, "Latin");
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test(Locale.FRENCH, "Latin");
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test(Locale.JAPANESE, "Japanese");
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}
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public static void test(Locale loc, String name) throws IOException {
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System.out.println();
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System.out.println("Testing " + loc.getDisplayName() + ", file: " + name);
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System.out.println();
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// get test data
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String fileName = PREFIX + name + ".txt";
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FileInputStream fis = new FileInputStream(fileName);
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InputStreamReader isr = new InputStreamReader(fis, "UnicodeLittle");
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BufferedReader br = new BufferedReader(isr, 32*1024);
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int counter = 0;
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ArrayList list = new ArrayList();
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while (true) {
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String line = Utility.readDataLine(br);
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if (line == null) break;
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if (line.length() == 0) continue;
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Utility.dot(counter++);
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list.add(line);
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}
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System.out.println("Read " + counter + " lines in file");
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int limit = 800; // put a limit on it to save time
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// pump it up if there aren't very many
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while (list.size() < limit) {
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list.addAll(list);
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}
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int size = list.size();
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// later, adjust these so we always get a reasonble number of tries
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int extraIterations = 200;
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if (size > limit) size = limit;
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String[] tests = new String [size];
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for (int i = 0; i < size; ++i) {
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tests[i] = (String) list.get(i);
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}
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// get collators
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com.ibm.icu.text.Collator newCol = com.ibm.icu.text.Collator.getInstance(loc);
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java.text.Collator oldCol = java.text.Collator.getInstance(loc);
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double startTime, endTime;
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double delta, oldDelta;
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String probe;
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// load classes at least once before starting
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newCol.compare("a", "b");
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oldCol.compare("a", "b");
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// ================================================
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// check sort key size
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int stringSize = 0, newSize = 0, oldSize = 0;
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for (int i = 0; i < size; ++i) {
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stringSize += tests[i].length() * 2;
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byte[] newKey = newCol.getCollationKey(tests[i]).toByteArray();
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newSize += newKey.length;
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byte[] oldKey = oldCol.getCollationKey(tests[i]).toByteArray();
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oldSize += oldKey.length;
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}
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delta = stringSize/(size + 0.0);
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System.out.println("string size: " + nf.format(delta) + " bytes per key");
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System.out.println();
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delta = oldDelta = (oldSize/(size + 0.0));
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System.out.println("old sortkey size: " + nf.format(delta) + " bytes per key ");
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delta = (newSize/(size + 0.0));
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System.out.println("new sortkey size: " + nf.format(delta) + " bytes per key " + percent.format(delta/oldDelta));
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System.out.println();
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// ================================================
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// Sort Key: old time
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// get overhead time
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counter = 0;
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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for (int j = 0; j < size; ++j) {
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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double overhead = (1000*(endTime - startTime) / counter);
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System.out.println("overhead: " + nf.format((endTime - startTime) / counter) + " micros");
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counter = 0;
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int k = 0; k < extraIterations; ++k) {
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oldCol.getCollationKey(probe);
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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oldDelta = delta = (1000*(endTime - startTime) / counter) - overhead;
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System.out.println("Old sort key time: " + nf.format(delta)
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+ " micros (" + counter + " iterations)");
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// Sort Key: new time
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counter = 0;
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int k = 0; k < extraIterations; ++k) {
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newCol.getCollationKey(probe);
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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delta = (1000*(endTime - startTime) / counter) - overhead;
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System.out.println("New sort key time: " + nf.format(delta)
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+ " micros (" + counter + " iterations) " + percent.format(delta/oldDelta));
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System.out.println();
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// ================================================
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// Raw Compare
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if (DO_RAW) {
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// get overhead time
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counter = 0;
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startTime = System.currentTimeMillis();
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int opt = 0; // to keep the compiler from optimizing out
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int j = 0; j < size; ++j) {
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opt ^= probe.compareTo(tests[j]);
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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overhead = (1000*(endTime - startTime) / counter);
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System.out.println("overhead: " + nf.format((endTime - startTime) / counter) + " micros");
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// Raw Compare: old time
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counter = 0;
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int j = 0; j < size; ++j) {
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opt ^= oldCol.compare(probe, tests[j]);
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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oldDelta = delta = (1000*(endTime - startTime) / counter) - overhead;
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System.out.println("Old raw compare time: " + nf.format(delta)
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+ " micros (" + counter + " iterations)");
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// Raw Compare: new time
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counter = 0;
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int j = 0; j < size; ++j) {
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opt ^= newCol.compare(probe, tests[j]);
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counter++;
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}
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}
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endTime = System.currentTimeMillis();
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delta = (1000*(endTime - startTime) / counter) - overhead;
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System.out.println("New raw compare time: " + nf.format(delta)
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+ " micros (" + counter + " iterations) " + percent.format(delta/oldDelta));
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System.out.println();
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}
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// ================================================
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// Binary Search
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// note: I don't worry about getting the binary search precisely right, since I just want to
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// see which strings would get compared.
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// overhead
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int iterations = (size * extraIterations);
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startTime = System.currentTimeMillis();
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Arrays.sort(tests);
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int opt2 = 0; // keep from optimizing out
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int k = 0; k < extraIterations; ++k) {
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opt2 ^= Arrays.binarySearch(tests, probe);
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}
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}
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endTime = System.currentTimeMillis();
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overhead = delta = (1000*(endTime - startTime) / iterations);
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System.out.println("Overhead: " + nf.format(delta)
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+ " micros (" + iterations + " iterations)");
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// old time
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startTime = System.currentTimeMillis();
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Arrays.sort(tests, oldCol);
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int k = 0; k < extraIterations; ++k) {
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opt2 ^= Arrays.binarySearch(tests, probe, oldCol);
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}
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}
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endTime = System.currentTimeMillis();
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oldDelta = delta = (1000*(endTime - startTime) / iterations) - overhead;
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System.out.println("Old binary search time: " + nf.format(delta)
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+ " micros (" + iterations + " iterations)");
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// new time
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Arrays.sort(tests, newCol);
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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probe = tests[i];
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for (int k = 0; k < extraIterations; ++k) {
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opt2 ^= Arrays.binarySearch(tests, probe, newCol);
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}
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}
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endTime = System.currentTimeMillis();
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delta = (1000*(endTime - startTime) / iterations) - overhead;
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System.out.println("New binary search time: " + nf.format(delta)
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+ " micros (" + iterations + " iterations) " + percent.format(delta/oldDelta));
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System.out.println();
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// ================================================
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// Sort
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String[] sortTests = (String[]) tests.clone();
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extraIterations = 5;
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iterations = (size * extraIterations);
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// overhead
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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for (int k = 0; k < extraIterations; ++k) {
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System.arraycopy(tests, 0, sortTests, 0, tests.length); // copy array
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Arrays.sort(sortTests);
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}
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}
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endTime = System.currentTimeMillis();
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overhead = delta = (1000*(endTime - startTime) / iterations);
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System.out.println("overhead: " + nf.format(delta)
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+ " micros (" + iterations + " iterations)");
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// old time
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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for (int k = 0; k < extraIterations; ++k) {
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System.arraycopy(tests, 0, sortTests, 0, tests.length); // copy array
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Arrays.sort(sortTests, oldCol);
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}
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}
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endTime = System.currentTimeMillis();
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oldDelta = delta = (1000*(endTime - startTime) / iterations) - overhead;
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System.out.println("Old sort time: " + nf.format(delta)
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+ " micros (" + iterations + " iterations)");
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// new time
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startTime = System.currentTimeMillis();
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for (int i = 0; i < size; ++i) {
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for (int k = 0; k < extraIterations; ++k) {
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System.arraycopy(tests, 0, sortTests, 0, tests.length); // copy array
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Arrays.sort(sortTests, newCol);
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}
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}
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endTime = System.currentTimeMillis();
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delta = (1000*(endTime - startTime) / iterations) - overhead;
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System.out.println("New sort time: " + nf.format(delta)
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+ " micros (" + iterations + " iterations) " + percent.format(delta/oldDelta));
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}
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} |