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Currently experiencing very slow debug start up times (between 25-45 seconds) with idea CE 14.1.5. To reproduce:
I'm using a 2015 Macbook pro and Java 1.8.0_60 64bit.
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Remove breakpoints off your method and use them inside the method as that can cause your debug to take a very long time. Try running IntelliJ as admin. I had this issue at work where debugging was extremely slow and running as admin actually made it a lot faster.
Increase memory for IntelliJ IDEA By default, the IDE requests a maximum of 2048 MB. You can change this option in Help → Change memory settings. According to the feedback from some of our users and colleagues with big projects, changing the option to 8GB significantly improves IDE performance.
The only way to do that is to set a break point outside the loop, or position the cursor outside the loop and do "run until cursor".
To solve this, simply remove the jar of the debugged module from all modules' dependencies in the Project Structure. If you do not know which modules have the debugged module jar as dependencies, you can use some tools (Eg. Sublime Text, bash, ...) to search for the module name which is stored in Intellij *.
After profiling with advice from above, I tracked it down to this issue:
IntelliJ freezes for about 30 seconds before debugging
Which in turn points to an issue with InetAddress.getLocalHost() on *nix. Following the advice in this linked post certainly helped it go away:
InetAddress.getLocalHost() throws UnknownHostException
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