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