Which one is good for better performance ?

asked 2014-03-14 06:16:19 +0800

jaideep gravatar image jaideep flag of India
178 5

updated 2014-03-14 06:17:26 +0800

We are using @Command method for firing any method but we are using @NotifyChange method for reflecting the class variables. But In place of @NotifyChange we use

BindUtils.postNotifyChange(null, null, this.class, "*");

So which statement is good for better performance.

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answered 2014-03-14 06:25:38 +0800

sitansu gravatar image sitansu
2254 13

updated 2014-03-14 06:47:38 +0800

Before I put this question in SO look at here:


I personally suggest to use specific variable instead of "*" And its not better performancewise BindUtils.postNotifyChange(null, null, this.class, "*");

The basic difference beetween BindUtils and @NotifyChange :

BindUtils just takes a single property and @NotifyChange takes multiple property at a time.

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But sitansu which loads our result more faster after reflecting

jaideep ( 2014-03-14 06:30:42 +0800 )edit

I edit my answer see here

sitansu ( 2014-03-14 06:32:42 +0800 )edit

answered 2014-03-14 06:48:44 +0800

chillworld gravatar image chillworld flag of Belgium
5337 4 9

updated 2014-04-03 08:28:55 +0800

Actually, BindUtils can be more powerfull then @NotifyChanged If you are gonna use it in the same way I don't think there is a big difference.

Now, when will there a difference?
Assume you have a list what you get with this :

public List<User> getUsers() {
    return users;

Assume that we have buttons next to each user and the button fires a command that changes that user (like blocking that user) What we can do is put the @notifyChanged("users") what will mean in zk asking getUsers();

If we use BindUtils we can do the following :




Where blocked stands for a getter inside the User object.

Even we don't have a getter for that user in our VM this will still be executed and only that user in the whole list will update. With the first command all data is refreshed, with the second only the blocked is updated. Now the second isn't always possible cause maybe you don't know what field of all fields is updated but still you update 1 user in stead of getting all x users.

greetz chill.

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Asked: 2014-03-14 06:16:19 +0800

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Last updated: Apr 03 '14

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