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To run a script with the Dart->Kernel parser, use the -dfe option: dart --dfe=runtime/tools/kernel-service.dart --packages=/src/d2/sdk/.packages foo.dart The front end expects a directory named patched_sdk in the build directory (patched_sdk should be a sibling of the directory that contains the dart executable.) Warning: using a debug build dart executable is very slow. It takes 2 minutes to run Hello World in a debug build, and about 7 seconds in a release build. BUG= R=asiva@google.com Review URL: https://codereview.chromium.org/2483373002 .