ts-loader / fork-ts-checker-webpack-plugin maintainer here. I'm sorry to hear that's been your experience. It hasn't been my own; it could be worth you compar

ts-loader / fork-ts-checker-webpack-plugin maintainer here. I'm sorry to hear that's been your experience. It hasn't been my own; it could be worth you comparing your setup with one of the examples available. These are some good candidates: https://github.com/TypeStrong/ts-loader/tree/master/examples/thread-loader https://github.com/TypeStrong/ts-loader/tree/master/examples... https://github.com/TypeStrong/ts-loader/tree/master/examples/core-js https://github.com/TypeStrong/ts-loader/tree/master/examples... https://github.com/TypeStrong/ts-loader/tree/master/examples/fast-incremental-builds https://github.com/TypeStrong/ts-loader/tree/master/examples... (written by Kenneth Chau of the Outlook.com team) You may of course you may be using another typescript loader (there are several!). I thought it worth sharing in case you are using ts-loader and your config is catching you out. Best of luck!