In development completor. It suggests completions based on the scope and context of the caret. It is based on a parser written in ANTLR 4. The development of the antlr parser and scope builder is available here. The first completion in a project is always slow as it build the scope for the default imports. Then, each completions should be faster. The speed can be an issue for big project. Note that “import my.package.lib.* ” are quite slow to process.