As usual, the latest release of IntelliJ IDEA comes with improvements to help with debugging applications.
New Overhead Tab
Debugging an application comes with an inevitable cost. While we may know this, it's not always obvious what this might be. IntelliJ IDEA 2017.3 comes with a way to visualize this cost. There's now a new tab, Overhead, which gives a view of the cost of debugging. If you don't see this in the Debugger Tool Window, you may need to click the "Restore Overhead View" button:
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