Tips & Tricks Of J Developer 12C(12.1.2.0) :

Performance Tunning & Set-Up Physical Memory :

1. Change the look and feel of J Developer IDE rather using default personalize Oracle theme.     Change it to Windows.

          Tools -> Preferences -> Environment -> Look and Feel

2. Change following things in Tools -> Preferences -> Environment

     -------->    Disable "Automatically Reload Externally Modified Files"

- This is not always necessary, but can make a big difference on really slow file systems or if you keep a very large number of files open in the IDE and switch between applications frequently.

      -------->   Disable "Check for Externally Modified Files on Startup" and use  ojindex to                             prebuild source indexes.

- The first time you run JDeveloper on a large project it will create a source index in the background. You can run this process as part of your nightly build process so all developers using a standard project setup can use the prebuilt index. This saves some work on startup.

Tools/Preferences/Environment

Unchecked It.....................

3. We have discovered, that we can disable ADF Faces Rich Client animation functionality globally, just by adding one line in trinidad-config.xml file:

         

           <animation-enabled>false</animation-enabled

If you really don't need animation effect, this will help greatly when rendering LOV, popups, drawing data tables and etc. By disabling animation, artificial delay of components rendering is removed and this allows to achieve better UI performance.

4.  Disable unwanted or unused extensions in your J Developer IDE by uncheck it in extensions preferences of tools.

     Tools -> Preferences->Extensions

Restart Jdeveloper after disabling or unchecking extensions. You can disable extensions such related to UML, BugFinder etc.

5.  Change the default editor for jsff page ,xml and other used file to Source rather than Design or Overview.

To do :
      Tools -> Preferences -> FileTypes -> DefaultEditor tab

  Set-Up Physical Memory :

6. Increase max and min memory for Jdeveloper in ide.conf located at following path:

      <your-oracle-middle-directory> -> jdeveloper -> ide -> bin -> ide.conf
Memory should not be too high other Jdeveloper will use much of memory for caching .. So try to use it as physical memory

 One more thing you can do is assign Jdeveloper process the highest priority in task manger.

Go to Jdev64.exe process then set pripority to high So Ram Capacity mainly focus to Jdeveloper.

7. A reader has informed me that this line:

        #AddVMOption -XX:+AggressiveOpts

Breaks offline database support in JDeveloper... so that one will have to be avoided in some cases.