From: Doni Pracner Date: Wed, 6 May 2020 02:14:55 +0000 (+0200) Subject: Poredjenje performansi razlicitih listi, doterivanja X-Git-Url: https://svarog.pmf.uns.ac.rs/gitweb/?a=commitdiff_plain;ds=inline;p=spa1-materijali.git Poredjenje performansi razlicitih listi, doterivanja Reorganizacija koda na par mesta, popravljanje raznih ispisa da budu jasniji, olaksavanje nekih doterivanja za buducnost. --- diff --git a/kodovi/kolekcije/ListCompare.java b/kodovi/kolekcije/ListCompare.java index 2059d05..19ff149 100644 --- a/kodovi/kolekcije/ListCompare.java +++ b/kodovi/kolekcije/ListCompare.java @@ -26,25 +26,38 @@ import java.util.Random; */ public class ListCompare { - private static final int SEQ_LENGTH = 500; - private static final int TEST_NUMBER = 100; + private static int seq_length = 1000; + private static int test_repeats = 2000; public static void main(String[] args) { + System.out.println( + "Broj puta koliko će se testovi ponavljati:" + test_repeats); + System.out.println("* ponegde će biti naznačeno ako je drugačije"); + System.out.println( + "Sva vremena su izražena u nanosekundama, dato je prosečno vreme za jednu operaciju"); + System.out.println(); + System.out.println("al - ArrayList"); + System.out.println("ll - LinkedList"); + System.out.println("sl - naša sortirana lista"); + System.out.println(); // generate random sequence of numbers - int[] seq = genRandomSequence(SEQ_LENGTH, new Random(123456789)); + int[] seq = genRandomSequence(seq_length, new Random(123456789)); + int[] seqs = genRandomSequence(seq_length / 10, new Random(123456789)); // insert into ArrayList and LinkedList System.out.println("--- ubacivanje ---"); compareNormalInsertion(); System.out.println("--- contains operacija ---"); - compareContains(1000); + compareContains(seq); System.out.println("--- sortirano ubacivanje ---"); - compareSortedInsertion(seq); - - System.out.printf("custom insertion%n :%1$10.2f%n", customSortedInsertionTestMulti(seq, TEST_NUMBER)); - System.out.printf("custom insertion%n :%1$10.2f%n", customSortedInsertionTestMulti(seq, TEST_NUMBER)); + System.out.println("broj elemenata:" + (seq_length / 10)); + compareSortedInsertion(seqs); + System.out.printf("sl:%1$12.2f%n", + customSortedInsertionTestMulti(seqs, test_repeats)); + System.out.printf("sl:%1$12.2f%n", + customSortedInsertionTestMulti(seqs, test_repeats)); System.out.println("--- uklanjanja ---"); compareRemoval(10000); } @@ -57,18 +70,20 @@ public class ListCompare { } private static void compareNormalInsertion() { - int[] seq = genRandomSequence(10 * SEQ_LENGTH, new Random(123456789)); + int duz = 10 * seq_length; + int[] seq = genRandomSequence(duz, new Random(123456789)); ArrayList al = new ArrayList<>(); LinkedList ll = new LinkedList<>(); - int nt = TEST_NUMBER; - System.out.println("Normal insertion test"); - System.out.printf("ll:%1$10.2f%n", insertionTestMulti(ll, seq, nt)); - System.out.printf("al:%1$10.2f%n", insertionTestMulti(al, seq, nt)); - System.out.printf("al:%1$10.2f%n", insertionTestMulti(al, seq, nt)); - System.out.printf("ll:%1$10.2f%n", insertionTestMulti(ll, seq, nt)); + int nt = test_repeats / 20; + System.out.printf("Broj brojeva: %1d; broj testiranja: %2d%n", duz, nt); + System.out.printf("ll:%1$12.2f%n", insertionTestMulti(ll, seq, nt)); + System.out.printf("al:%1$12.2f%n", insertionTestMulti(al, seq, nt)); + System.out.printf("al:%1$12.2f%n", insertionTestMulti(al, seq, nt)); + System.out.printf("ll:%1$12.2f%n", insertionTestMulti(ll, seq, nt)); } - private static double insertionTestMulti(List l, int[] seq, int testNumber) { + private static double insertionTestMulti(List l, int[] seq, + int testNumber) { long sum = 0; for (int i = 0; i < testNumber; i++) { try { @@ -93,14 +108,19 @@ public class ListCompare { ArrayList al = new ArrayList<>(); LinkedList ll = new LinkedList<>(); - System.out.println("Sorted insertion test"); - System.out.printf("ll:%1$10.2f%n", sortedInsertionTestMulti(ll, seq, TEST_NUMBER)); - System.out.printf("al:%1$10.2f%n", sortedInsertionTestMulti(al, seq, TEST_NUMBER)); - System.out.printf("al:%1$10.2f%n", sortedInsertionTestMulti(al, seq, TEST_NUMBER)); - System.out.printf("ll:%1$10.2f%n", sortedInsertionTestMulti(ll, seq, TEST_NUMBER)); + System.out.println("Sortirano ubacivanje"); + System.out.printf("ll:%1$12.2f%n", + sortedInsertionTestMulti(ll, seq, test_repeats)); + System.out.printf("al:%1$12.2f%n", + sortedInsertionTestMulti(al, seq, test_repeats)); + System.out.printf("al:%1$12.2f%n", + sortedInsertionTestMulti(al, seq, test_repeats)); + System.out.printf("ll:%1$12.2f%n", + sortedInsertionTestMulti(ll, seq, test_repeats)); } - private static double sortedInsertionTestMulti(List l, int[] seq, int numtests) { + private static double sortedInsertionTestMulti(List l, int[] seq, + int numtests) { long sum = 0; for (int i = 0; i < numtests; i++) { try { @@ -123,13 +143,14 @@ public class ListCompare { private static void insertSorted(int num, List l) { int i = 0; - while (i < l.size() && l.get(i) < num) { + while (i < l.size() && l.get(i).compareTo(num) < 0) { i++; } l.add(i, num); } - private static double customSortedInsertionTestMulti(int[] seq, int numtests) { + private static double customSortedInsertionTestMulti(int[] seq, + int numtests) { long sum = 0; for (int i = 0; i < numtests; i++) { sum += customSortedInsertion(seq); @@ -156,38 +177,55 @@ public class ListCompare { ll.add(i); l.dodaj(i); } - System.out.println("test izbacivanja; duzina:" + seqLength); - System.out.println("izbacivanje nepostojeceg:"); + System.out.println("test izbacivanja; dužina:" + seqLength); + System.out.println("izbacivanje nepostojećeg:"); double perc = -1.0; - int testNumber = TEST_NUMBER; - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); + int testNumber = test_repeats; + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); perc = 0.1; - System.out.println("izbacivanje postojeceg na procentu:" + perc); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.println("izbacivanje postojećeg na procentu:" + perc); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); perc = 0.5; - System.out.println("izbacivanje postojeceg na procentu:" + perc); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.println("izbacivanje postojećeg na procentu:" + perc); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); perc = 0.8; - System.out.println("izbacivanje postojeceg na procentu:" + perc); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("ll:%1$10.2f\n", removalTestMulti(ll, seqLength + 2, testNumber, perc)); - System.out.printf("al:%1$10.2f\n", removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.println("izbacivanje postojećeg na procentu:" + perc); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("ll:%1$12.2f\n", + removalTestMulti(ll, seqLength + 2, testNumber, perc)); + System.out.printf("al:%1$12.2f\n", + removalTestMulti(al, seqLength + 2, testNumber, perc)); } - private static double removalTestMulti(List l, int num, int testNumber, double percentWhere) { + private static double removalTestMulti(List l, int num, + int testNumber, double percentWhere) { long sum = 0; for (int i = 0; i < testNumber; i++) { if (percentWhere >= 0) { @@ -200,9 +238,9 @@ public class ListCompare { return ((double) sum) / testNumber; } - private static void compareContains(int seqLength) { - - int[] seq = genRandomSequence(seqLength, new Random(123456789)); + private static void compareContains(int[] seq) { + int seqLength = seq.length; + System.out.println("Broj brojeva:" + seqLength); ArrayList al = new ArrayList<>(); LinkedList ll = new LinkedList<>(); SortiranaListaBrojeva l = new SortiranaListaBrojeva(); @@ -212,33 +250,48 @@ public class ListCompare { l.dodaj(i); } - System.out.println("nepostojeci:"); - System.out.printf("contains al:%1$10.2f%n" , containsTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("contains ll:%1$10.2f%n" , containsTestMulti(ll, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-rucn al:%1$10.2f%n" , forSearchTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-rucn ll:%1$10.2f%n" , forSearchTestMulti(ll, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-each al:%1$10.2f%n" , forEachSearchTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-each ll:%1$10.2f%n" , forEachSearchTestMulti(ll, seqLength + 1, TEST_NUMBER)); - - System.out.printf("custom sort:%1$10.2f%n" , customContainsSortedTestMulti(l, seqLength + 1, TEST_NUMBER)); + System.out.println("- nepostojeći (-1):"); + System.out.printf("contains al:%1$12.2f%n", + containsTestMulti(al, -1, test_repeats)); + System.out.printf("contains ll:%1$12.2f%n", + containsTestMulti(ll, -1, test_repeats)); + System.out.printf("petlja al:%1$12.2f%n", + loopSearchTestMulti(al, -1, test_repeats)); + System.out.printf("petlja ll:%1$12.2f%n", + loopSearchTestMulti(ll, -1, test_repeats)); + System.out.printf("for-each al:%1$12.2f%n", + forEachSearchTestMulti(al, -1, test_repeats)); + System.out.printf("for-each ll:%1$12.2f%n", + forEachSearchTestMulti(ll, -1, test_repeats)); + + System.out.printf("sl uListi :%1$12.2f%n", + customContainsSortedTestMulti(l, -1, test_repeats)); al.set(seqLength / 3, seqLength + 1); ll.set(seqLength / 3, seqLength + 1); // ovaj moramo uzeti jer je sortirano int el3 = l.element(seqLength / 3); - System.out.println("postojeci:"); - - System.out.printf("contains al:%1$10.2f%n" , containsTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("contains ll:%1$10.2f%n" , containsTestMulti(ll, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-rucn al:%1$10.2f%n" , forSearchTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-rucn ll:%1$10.2f%n" , forSearchTestMulti(ll, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-each al:%1$10.2f%n" , forEachSearchTestMulti(al, seqLength + 1, TEST_NUMBER)); - System.out.printf("for-each ll:%1$10.2f%n" , forEachSearchTestMulti(ll, seqLength + 1, TEST_NUMBER)); - - System.out.printf("custom sort:%1$10.2f%n" , customContainsSortedTestMulti(l, el3, TEST_NUMBER)); + System.out.println("- postojeći (na trećini dužine):"); + + System.out.printf("contains al:%1$12.2f%n", + containsTestMulti(al, seqLength + 1, test_repeats)); + System.out.printf("contains ll:%1$12.2f%n", + containsTestMulti(ll, seqLength + 1, test_repeats)); + System.out.printf("for-ručn al:%1$12.2f%n", + loopSearchTestMulti(al, seqLength + 1, test_repeats)); + System.out.printf("for-ručn ll:%1$12.2f%n", + loopSearchTestMulti(ll, seqLength + 1, test_repeats)); + System.out.printf("for-each al:%1$12.2f%n", + forEachSearchTestMulti(al, seqLength + 1, test_repeats)); + System.out.printf("for-each ll:%1$12.2f%n", + forEachSearchTestMulti(ll, seqLength + 1, test_repeats)); + + System.out.printf("sl uListi :%1$12.2f%n", + customContainsSortedTestMulti(l, el3, test_repeats)); } - private static double containsTestMulti(List l, int num, int numTests) { + private static double containsTestMulti(List l, int num, + int numTests) { long res = 0; for (int i = 0; i < numTests; i++) { long curr = System.nanoTime(); @@ -248,13 +301,15 @@ public class ListCompare { return ((double) res) / numTests; } - private static double forSearchTestMulti(List l, int num, int numTests) { + private static double loopSearchTestMulti(List l, int num, + int numTests) { long res = 0; for (int i = 0; i < numTests; i++) { long curr = System.nanoTime(); int j = 0; - while (j < l.size() && !l.get(j).equals(num)) + int size = l.size(); + while (j < size && !l.get(j).equals(num)) j++; res += System.nanoTime() - curr; @@ -262,13 +317,14 @@ public class ListCompare { return ((double) res) / numTests; } - private static double forEachSearchTestMulti(List l, int num, int numTests) { + private static double forEachSearchTestMulti(List l, int num, + int numTests) { long res = 0; for (int i = 0; i < numTests; i++) { long curr = System.nanoTime(); - for (int el : l) - if (el == num) + for (Integer el : l) + if (el.equals(num)) break; res += System.nanoTime() - curr; @@ -276,7 +332,8 @@ public class ListCompare { return ((double) res) / numTests; } - private static double customContainsSortedTestMulti(SortiranaListaBrojeva l, int num, int numTests) { + private static double customContainsSortedTestMulti(SortiranaListaBrojeva l, + int num, int numTests) { long res = 0; for (int i = 0; i < numTests; i++) { long curr = System.nanoTime(); @@ -335,7 +392,8 @@ class SortiranaListaBrojeva { if (!prvi.info.equals(s)) { Element prethodni = prvi; - while (prethodni.veza != null && prethodni.veza.info.compareTo(s) < 0) { + while (prethodni.veza != null + && prethodni.veza.info.compareTo(s) < 0) { prethodni = prethodni.veza; } Element novi = new Element(s); @@ -362,8 +420,7 @@ class SortiranaListaBrojeva { if (tekuci != null) { return tekuci.info; } else { - throw new IndexOutOfBoundsException("Lista je kraca od " - + k); + throw new IndexOutOfBoundsException("Lista je kraca od " + k); } }