For those who had never heard of this setting before, there is an interesting blog post about it on the JetBrains blog: http://blog.jetbrains.com/idea/2015/08/e

For those who had never heard of this setting before, there is an interesting blog post about it on the JetBrains blog: http://blog.jetbrains.com/idea/2015/08/experimental-zero-latency-typing-in-intellij-idea-15-eap/ http://blog.jetbrains.com/idea/2015/08/experimental-zero-lat... tl;dr: Add "editor.zero.latency.typing=true" to the "idea.properties" file.