Eclipse IDE provides a lot of powerful features and capabilities. With so much functionality at disposal, many users don't use the full potential of the IDE. To be productive, mastering your IDE is as important as mastering your source code.
While increasing amount of features usually result in poorer performance and more memory consumption, Eclipse Photon has proven the opposite: The Eclipse Platform got faster and less memory hungry than before. This has been achieved by intensive profiling of multiple use cases and refactorings derived from the analysis.