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Var declaration inside or outside loop comparision
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// javap -Xbatch \ | |
// -XX:-TieredCompilation \ | |
// -XX:+PrintCompilation \ | |
// Main \ | |
// 2> /dev/null | |
// 71 1 b java.lang.String::hashCode (55 bytes) | |
// 80 2 b java.lang.String::indexOf (70 bytes) | |
// 94 3 b sun.nio.cs.UTF_8$Encoder::encode (359 bytes) | |
// 98 4 b java.io.BufferedInputStream::getBufIfOpen (21 bytes) | |
// 99 5 s b java.io.BufferedInputStream::read (49 bytes) | |
// 102 6 b java.io.DataInputStream::readChar (40 bytes) | |
// 105 7 % b sun.text.normalizer.NormalizerDataReader::read @ 11 (83 bytes) | |
// 107 7 % sun.text.normalizer.NormalizerDataReader::read @ -2 (83 bytes) made not entrant | |
// 108 6 java.io.DataInputStream::readChar (40 bytes) made not entrant | |
// 109 8 s b java.io.ByteArrayInputStream::read (36 bytes) | |
// 112 9 b java.io.DataInputStream::readInt (72 bytes) | |
// 117 10 b java.io.DataInputStream::readChar (40 bytes) | |
// javap -Xbatch \ | |
// -XX:-TieredCompilation \ | |
// -XX:+PrintCompilation \ | |
// MainInternal \ | |
// 2> /dev/null | |
// 68 1 b java.lang.String::hashCode (55 bytes) | |
// 76 2 b java.lang.String::indexOf (70 bytes) | |
// 85 3 b sun.nio.cs.UTF_8$Encoder::encode (359 bytes) | |
// 90 4 b java.io.BufferedInputStream::getBufIfOpen (21 bytes) | |
// 91 5 s b java.io.BufferedInputStream::read (49 bytes) | |
// 94 6 b java.io.DataInputStream::readChar (40 bytes) | |
// 97 7 % b sun.text.normalizer.NormalizerDataReader::read @ 11 (83 bytes) | |
// 100 7 % sun.text.normalizer.NormalizerDataReader::read @ -2 (83 bytes) made not entrant | |
// 100 6 java.io.DataInputStream::readChar (40 bytes) made not entrant | |
// 102 8 s b java.io.ByteArrayInputStream::read (36 bytes) | |
// 105 9 b java.io.DataInputStream::readInt (72 bytes) | |
// 110 10 b java.io.DataInputStream::readChar (40 bytes) | |
public class Main { | |
public static void main(String[] args){ | |
String variable; | |
for (int i = 0; i < 10000; i++) { | |
// We use new constructor to get a new instance each time | |
variable = new String("Hello"); | |
System.err.println(variable); | |
} | |
} | |
} | |
public class MainInternal { | |
public static void main(String[] args){ | |
for (int i = 0; i < 10000; i++) { | |
// We use new constructor to get a new instance each time | |
String variable = new String("Hello"); | |
System.err.println(variable); | |
} | |
} | |
} |
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