It seems like the unit tests for rP are very slow (at least for me locally), which means it makes several minutes to submit a diff.
```
Linting...
LINT OKAY No lint problems.
Running unit tests...
PASS 187ms PhabricatorSetupCheckTestCase::testLoadAllChecks
PASS 1.8s PhabricatorLibraryTestCase::testLibraryMap
PASS 1m22s PhabricatorLibraryTestCase::testMethodVisibility
PASS 1.2s PhabricatorLibraryTestCase::testEverythingImplemented
PASS 12.6s PhabricatorCelerityTestCase::testCelerityMaps
PASS 1.5s PhabricatorConduitTestCase::testConduitMethods
PASS 426ms PhabricatorInfrastructureTestCase::testRejectMySQLNonUTF8Queries
PASS 431ms PhabricatorInfrastructureTestCase::testApplicationsInstalled
PASS 4.4s ConpherenceRoomTestCase::testNUserRoomCreate
PASS 6.8s ConpherenceRoomTestCase::testRoomParticipantDeletion
PASS 2.1s ConpherenceRoomTestCase::testOneUserRoomCreate
PASS 13.8s ConpherenceRoomTestCase::testAddMessageWithFileAttachments
PASS 4.7s ConpherenceRoomTestCase::testRoomParticipantAddition
PASS 6.3s DifferentialParseRenderTestCase::testParseRender
PASS 22.6s ManiphestTaskTestCase::testTaskReordering
PASS 32.6s ManiphestTaskTestCase::testTaskAdjacentBlocks
PASS 9.5s PhabricatorProjectEditorTestCase::testEditProject
PASS 31.0s PhabricatorProjectEditorTestCase::testJoinLeaveProject
PASS 5.6s PhabricatorProjectEditorTestCase::testViewProject
PASS 6.5s PhabricatorChangeParserTestCase::testSubversionForeignStubsParser
PASS 8.9s PhabricatorChangeParserTestCase::testMercurialParser
PASS 5.7s PhabricatorChangeParserTestCase::testSubversionValidRootParser
PASS 8.5s PhabricatorChangeParserTestCase::testGitParser
PASS 5.6s PhabricatorChangeParserTestCase::testSubversionPartialParser
PASS 15.2s PhabricatorChangeParserTestCase::testSubversionParser
PASS 417ms PhabricatorAphrontViewTestCase::testHasChildren
PASS 449ms PhabricatorLocalTimeTestCase::testLocalTimeFormatting
PASS 440ms PhabricatorUnitsTestCase::testDetailedDurationFormatting
PASS 417ms PhabricatorUnitsTestCase::testByteParsing
PASS 411ms PhabricatorUnitsTestCase::testByteFormatting
```