java - Object vs byte[0] as lock -

-

I commented first ("why java.lang.Object is not abstract?") Stating that I have heard that one Byte [0] was slightly more efficient as a lock using a java.lang.Object . I'm sure I've read it somewhere, but I can not remember: Does anyone know that this is really true?

I suspect that this requires a bit byte code compared to byte [0] / code> to object , although it was reported that the < To store code> byte [0] length field requires additional storage and therefore it seems it can reject any benefit

I was curious enough to test this. Source code: 

  test for public class {public static object return object () {new object returns (); } Public stable byte [] Return back () {new byte [0]; }}

Bytecode: 

  public static java.lang.Object returnObject (); Code: 0: new # 2; // Class Java / Long / Object 3: Dip 4: Investigator # 1; // method java / lang / object "& Lt; init & gt;" :() V7: Public Static Byte [] Return Back; Code: 0: IconStage 1: Newer byte 3: Current

So you are right that the byte code is small for arrays, because array creation has its own JVM session but what does that mean is? nothing really. This is a virtual machine, so there is no guarantee that less bytecode instructions mean less work for actual physical CPU. We can start the outline of the course, but it will be quite useless. It does not make any difference if it does not matter, it will never talk any thing. Object creation is incredibly fast nowadays before you can also calculate the total time, you may be able to for your loop index Long time to start using .


Comments

Post a Comment

Popular posts from this blog

php - multilevel menu with multilevel array -

-
Just ask someone to solve this problem? I want to create a multilevel menu I can not find the right solution generated with multilevel array, it always gets an array_push error My study came from the original idea But still my Can not match the need. This is my MySQL [code] ----- --------------------- --------------- | ID | PARENT_ID | Name | Link | Seq | 1 | 0 | Dashboad | Dashboard / | 1 | 2 | 0 | Menu 1 | Menu 1 / | 2 | 3 | 0 | Menu 2 | Menu 2 / | 3 | 4 | 0 | Menu 3 | Menu 3 / | 4 | 5 | 2 | Joint Add / | 1 | 6 | 3 | Joint Add / | 1 | 7 | 2 | Edit | Edit / | 2 | 8 | 4 | Joint Add / | 1 ------------------------------------------ [/ Code] I want to do something like this in my array array ('dashboard' = & gt; array ('id' = & gt; '' 'Dame' = & gt; 'Dashboard', 'Title' = & gt; 'Dashboard', 'MatchMin' = & gt; Base_URL (). 'Dashboard /', 'Active' => = & Gt; NULL), &
Read more

c# - TypeConverter in propertygrid only converts from string, not to -

-
When the property grid is reached, only the conversion mechanism (often called) is called "Foo!" Returns the property string in the grid when I click to edit I get an exception Type.oo. Object type can not be changed to type. (Not properly translated,) What is a clue from the convert format, why not? And the error indicates that it is trying to convert to a string, not from. I think that when I want to edit this object, it will have to be converted from foo to string, and when the editing ends. Public class FooTypeConverter: StringConverter {public override object ConvertFrom (ITypeDescriptorContext Reference, CultureInfo Culture, Object Value) {New Foo (string) value); } Convert the public override object (Type the ITE DiskText Contact Reference, CultureInfo Culture, Object Value, Type Type) {Return "Foo!"; } Public override bool CanConvertFrom (ITypeDescriptorContext reference, type source type) {back true; } Public Override Bull CanConvertTo (ITypeDescrip
Read more

jQuery UI: Datepicker month format -

-
I am trying to change the format of the month that shows in the popup (not in the date that the picker actually I do not have any choice anywhere to do this, do I like to use a sub-string () or something else? What I normally display is Trying to change: Class = "ui-datepicker-title"> January & lt; / span & gt; ... & lt; / div & gt; Div>
Read more