JRMC JDKとSun JDK JDBCの性能の差は大きいですね、意外なing
マップ
コードを貼る
java -Xms128M -Xmx256M -cp ../lib/ojdbc14.jar:. test.Conn
T2370 Windows - XP SP3 JR : CPU 10 - 40% Mem 150M java version "1.6.0_14"(Mission Control) HS : CPU 10 - 20% Mem 130M java version "1.6.0_13" Linux - Ubuntu8.04 JR : CPU 20 - 30% Mem 130M java version "1.6.0_14"(Mission Control) HS : CPU 10 - 20% Mem 100M java version "1.6.0_13"
コードを貼る
long sysms = System.currentTimeMillis();
ResultSet rs = stmt.executeQuery(sql);
long sysmsEnd = System.currentTimeMillis();
ResultSetMetaData rsmt = rs.getMetaData();
int cols = rsmt.getColumnCount();
List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
while(rs.next()){
Map<String, Object> map = new HashMap<String, Object>();
for(int i=1;i<=cols;i++){
map.put(rsmt.getColumnName(i), rs.getObject(i));
}
list.add(map);
}
long sysmsEnd2 = System.currentTimeMillis();
java -Xms128M -Xmx256M -cp ../lib/ojdbc14.jar:. test.Conn
T2370 Windows - XP SP3 JR : CPU 10 - 40% Mem 150M java version "1.6.0_14"(Mission Control) HS : CPU 10 - 20% Mem 130M java version "1.6.0_13" Linux - Ubuntu8.04 JR : CPU 20 - 30% Mem 130M java version "1.6.0_14"(Mission Control) HS : CPU 10 - 20% Mem 100M java version "1.6.0_13"