|  | > [!IMPORTANT] | 
|  | > This page was copied from https://github.com/dart-lang/sdk/wiki and needs review. | 
|  | > Please [contribute](../CONTRIBUTING.md) changes to bring it up-to-date - | 
|  | > removing this header - or send a CL to delete the file. | 
|  |  | 
|  | --- | 
|  |  | 
|  | # Developer notes for working on kernel | 
|  |  | 
|  | ## How to test changes on pkg/kernel: | 
|  |  | 
|  | Run dartanalyzer in strong mode: | 
|  | ``` | 
|  | (cd pkg/kernel && dartanalyzer --strong bin lib test) | 
|  | ``` | 
|  |  | 
|  | Run unit tests of kernel, front_end, and dart2js that are directly affected: | 
|  | ``` | 
|  | ./tools/test.py pkg/kernel -mrelease --checked | 
|  | ./tools/test.py pkg/front_end -mrelease --checked | 
|  | ./tools/test.py dart2js/kernel -mrelease --checked | 
|  | ``` | 
|  |  | 
|  | Run end-to-end tests using dartk + VM: | 
|  | ``` | 
|  | ./tools/test.py -m release -c dartk language | 
|  | ``` | 
|  |  | 
|  | Optionally (this is slow) run end-to-end tests using AOT: | 
|  | ``` | 
|  | ./tools/build.py runtime_precompiled | 
|  | ./tools/test.py -cdartkp -rdart_precompiled language co19 | 
|  | ``` | 
|  |  | 
|  | Comparing the output of compiling dart2js before and after the change. This [script][1] can make it easier to compare the results. | 
|  |  | 
|  | [1]: https://gist.github.com/asgerf/adde37ed58fe984d53b82d362187c777 |