HashMap KeySet Iterator use is much slower using instrumented version
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Key: CDV-627
URL: https://jira.terracotta.org/jira//browse/CDV-627
Project: Community Development
Issue Type: Bug
Components: Byte Code Transform
Affects Versions: 2.5.1
Reporter: Alex Miller
Assignee: Engineering Transparency Team
Forum: http://forums.terracotta.org/forums/posts/list/818.page
I tested with code below using java/dso-java and saw differences as well.
import java.util.HashMap;
import java.util.Map;
public class IteratorTest
{
public static void main(String[] args)
{
int num = 10000000;
String val = "";
Map<Integer, String> map = new HashMap<Integer, String>();
for ( int i =0 ; i < num; i ++ )
{
map.put(i, val);
}
long begin = System.currentTimeMillis();
for ( Integer s : map.keySet() )
{
}
long end = System.currentTimeMillis();
System.out.println("Time: " + (end-begin));
}
}
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