Package org.gbif.utils.text

Class ComparatorPerformance

java.lang.Object

org.gbif.utils.text.ComparatorPerformance

public class ComparatorPerformance
extends Object

Author:

markus

Constructor Summary

Constructors

Constructor	Description
ComparatorPerformance()

Method Summary

Modifier and Type	Method	Description
void	testFileSorting()	Comparing performance for various file soring methods.
void	testVariousComparators()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ComparatorPerformance

public ComparatorPerformance()

Method Details

testFileSorting

@Test
public void testFileSorting()
                     throws IOException

Comparing performance for various file soring methods.

Executed on a MacPro with 9GB, 8-core 3GHz and 1TB disk sorting a 207MB large text file made from concatenation of irmng.tail:

Sorting with unix sort took 5817 ms Sorting with org.gbif.utils.text.StringComparator and 10k lines in memory (200 parts) took 48968 ms Sorting with org.gbif.utils.text.CCollationComparator and 10k lines in memory (200 parts) took 49858 ms Sorting with org.gbif.utils.text.StringComparator and 100k lines in memory (20 parts) took 17962 ms Sorting with org.gbif.utils.text.CCollationComparator and 100k lines in memory (20 parts) took 14046 ms Sorting with org.gbif.utils.text.StringComparator and 1000k lines in memory (2 parts) took 15492 ms Sorting with org.gbif.utils.text.CCollationComparator and 1000k lines in memory (2 parts) took 14317 ms

Throws:

IOException

testVariousComparators

@Test
public void testVariousComparators()
                            throws IOException

Throws:

IOException