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# Perfetto UI
## Quick Start
```bash
$ git clone https://android.googlesource.com/platform/external/perfetto/
$ cd perfetto
# Will build into ./out/ui by default. Can be changed with --out path/
# The final bundle will be available at ./ui/out/dist/.
# The build script creates a symlink from ./ui/out to $OUT_PATH/ui/.
ui/build
# This will automatically build the UI. There is no need to manually run
# ui/build before running ui/run-dev-server.
ui/run-dev-server
```
Then navigate to `http://localhost:10000`.
See also https://perfetto.dev/docs/contributing/build-instructions#ui-development
## Unit tests
```bash
ui/run-unittests # Add --watch to run them in watch mode.
```
## Integration tests (browser screenshot difftests)
```bash
run-integrationtests
```
To rebaseline screenshots after a UI change
```bash
ui/run-integrationtests --rebaseline
tools/test_data upload
git add -A
git commit
```
See also https://perfetto.dev/docs/contributing/testing#ui-pixel-diff-tests
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