Fasten JDeveloper IDE memory and development

1- To quick open a file , you want to change the default view editor from design to source.

2- To open Jdeveloper quickly without opening last opened tabs or welcome messages , open command prompt "cmd.exe" and go to the path of your "jdeveloper.exe" and execute:

jdeveloper.exe -nonag -noreopen

3- To increase memory, Edit the file "ide.conf" at oracle home :
E:\Oracle\Middleware_12_c\jdeveloper\ide\bin\ide.conf and add following lines to increase memory

AddVMOption -XX:MaxPermSize=1024m
AddVMOption -XX:PermSize=512M
AddVMOption -Xms2048M
AddVMOption -Xmx4096M

4- To increase memory, Edit the file "jdev.conf" at oracle home :
E:\Oracle\Middleware_12_c\jdeveloper\jdev\bin\jdev.conf

// Increase your MaxPermSize
AddVMOption -XX:MaxPermSize=1024m
AddVMOption -XX:PermSize=512M
AddVMOption -Xms1024M
AddVMOption -Xmx3072M

//Adds a memory monitor which helps in check current heap used by jdeveloper
AddVMOption -DMainWindow.MemoryMonitorOn=true

//ADD the following JVM options towards the end of file
AddVMOption -XX:+UseStringCache
AddVMOption -XX:+OptimizeStringConcat
AddVMOption -XX:+UseCompressedStrings
AddVMOption -XX:+UseCompressedOops
AddVMOption -XX:+AggressiveOpts
AddVMOption -XX:+UseConcMarkSweepGC
AddVMOption -DVFS_ENABLE=true
AddVMOption -Dsun.java2d.ddoffscreen=false
AddVMOption -XX:+UseParNewGC
AddVMOption -XX:+CMSIncrementalMode
AddVMOption -XX:+CMSIncrementalPacing
AddVMOption -XX:CMSIncrementalDutyCycleMin=0
AddVMOption -XX:CMSIncrementalDutyCycle=10

To make JDeveloper responsive after returning from minimizing and restoring :
Dsun.awt.keepWorkingSetOnMinimize=true

5- Remove build after save action, click on "Tools" menu select "Preferences" then select "Save Actions" from the tree menu then delete this action.

6- Try to install one of the free ram disk softwares which creates a virtual drive using the available main memory (RAM) in your compute then you can checkout your application in this driver to make it faster.

 EX. 

At "AMD Radeon RAMDisk" software, you can configure 4GB of your computers available RAM (up to 6GB if you have AMD Radeon™ memory installed).

https://www.ghacks.net/2017/04/03/the-best-free-ramdisk-programs-for-windows/