Ok, I did the patch. The first part where it tells you the changes is indeed faster; it is about as fast as status now. But after that it hangs a long time again. The log file is:

Fri 2009-07-31 12:41:45 +0200
0.012  bzr arguments: [u'--lsprof-file', u'/home/jal/commit.callgrind', u'commit', u'-m', u'Merge with trunk of ViewPoint']
0.020  looking for plugins in /home/jal/.bazaar/plugins
0.083  looking for plugins in /usr/lib/python2.6/dist-packages/bzrlib/plugins
0.118  encoding stdout as sys.stdout encoding 'UTF-8'
0.132  opening working tree '/home/jal/bzr/vp-split/vp'
0.147  preparing to commit
[17492] 2009-07-31 12:41:46.146 INFO: Committing to: /home/jal/bzr/vp-split/vp/
0.157  Selecting files for commit with filter []
1.228  Resizing the inventory entry cache from 10240 to 29990
[17492] 2009-07-31 12:41:48.085 INFO: modified moca.database/src/nl/itris/viewpoint/db/hibernate/HibernateUtil.java
[17492] 2009-07-31 12:41:48.086 INFO: added moca.database/src/nl/itris/viewpoint/db/red/DaoViewpointDocument.java
[17492] 2009-07-31 12:41:48.087 INFO: added moca.database/src/nl/itris/viewpoint/db/red/DisBlob.java
[17492] 2009-07-31 12:41:48.087 INFO: modified moca.database/src/nl/itris/viewpoint/db/red/ViewPointDocument.java
[17492] 2009-07-31 12:41:48.122 INFO: modified viewpoint/.settings/org.eclipse.wst.common.component
[17492] 2009-07-31 12:41:48.122 INFO: modified viewpoint/Documentatie/ReleaseNote-3-3.txt
[17492] 2009-07-31 12:41:48.129 INFO: modified viewpoint/Oracle/pck/fin_general.pck
[17492] 2009-07-31 12:41:48.129 INFO: modified viewpoint/Oracle/pck/tda_general.pck
[17492] 2009-07-31 12:41:48.130 INFO: added viewpoint/Oracle/tablechanges/20090728_VOOW_ALTER_FIN_BUDGET_MUTATIES.sql
[17492] 2009-07-31 12:41:48.132 INFO: modified viewpoint/Oracle/triggers/dis_dbb_briu.trg
[17492] 2009-07-31 12:41:48.141 INFO: modified viewpoint/Oracle/views/w_crm_subjects.vw
[17492] 2009-07-31 12:41:48.141 INFO: modified viewpoint/Oracle/views/w_info_persons.vw
[17492] 2009-07-31 12:41:48.159 INFO: modified viewpoint/WebContent/iRed/Bae/Facturatie/Bae_boekingsregelsEditPage.jsp
[17492] 2009-07-31 12:41:48.160 INFO: added viewpoint/WebContent/iRed/Bae/Facturatie/Bae_facturenEditPage.jsp
[17492] 2009-07-31 12:41:48.160 INFO: deleted viewpoint/WebContent/iRed/Bae/Facturatie/Bae_facturenEditPage.jsp
[17492] 2009-07-31 12:41:48.160 INFO: modified viewpoint/WebContent/iRed/Bae/Facturatie/Bae_werkopdrachtenLovPage.jsp
[17492] 2009-07-31 12:41:48.173 INFO: modified viewpoint/WebContent/iRed/Tda/Fin/Npo_procuratie_collectief.jsp
[17492] 2009-07-31 12:41:48.175 INFO: modified viewpoint/WebContent/iRed/Tda/Pmo/Mjb/Pmo_mjb_sheet.js
[17492] 2009-07-31 12:41:48.175 INFO: modified viewpoint/WebContent/iRed/Tda/Pmo/Projects/Pmo_projectenEditPage.jsp
[17492] 2009-07-31 12:41:48.177 INFO: modified viewpoint/WebContent/iRed/Wfl/Dis/Dis_postkamerMenuPage.jsp
[17492] 2009-07-31 12:41:48.178 INFO: modified viewpoint/applet-src/ViewPointWorkflow/ModuleDialog.java
[17492] 2009-07-31 12:41:48.179 INFO: modified viewpoint/applet-src/ViewPointWorkflow/Workflow.java
[17492] 2009-07-31 12:41:48.180 INFO: modified viewpoint/src/Tags/Form/Select_intoGrid.java
[17492] 2009-07-31 12:41:48.181 INFO: modified viewpoint/src/iRed/Bae/Facturatie/bae_boekingsregelsBean.java
[17492] 2009-07-31 12:41:48.182 INFO: modified viewpoint/src/iRed/Bae/Facturatie/bae_facturenBean.java
[17492] 2009-07-31 12:41:48.184 INFO: added viewpoint/src/iRed/Fin/BudgetMutatie.java
[17492] 2009-07-31 12:41:48.185 INFO: added viewpoint/src/iRed/Fin/BudgetMutatieHelper.java
[17492] 2009-07-31 12:41:48.185 INFO: added viewpoint/src/iRed/Fin/BudgetMutatieStatus.java
[17492] 2009-07-31 12:41:48.185 INFO: added viewpoint/src/iRed/Fin/BudgetMutatieType.java
[17492] 2009-07-31 12:41:48.190 INFO: modified viewpoint/src/iRed/Tda/Npo/npo_onderhoudMultiBean.java
[17492] 2009-07-31 12:41:48.190 INFO: modified viewpoint/src/iRed/Tda/Npo/npo_onderhoud_mutatiesBean.java
[17492] 2009-07-31 12:41:48.190 INFO: modified viewpoint/src/iRed/Tda/Npo/npo_werkverzoekenBean.java
[17492] 2009-07-31 12:41:48.191 INFO: modified viewpoint/src/iRed/Tda/Pmo/pmo_mjb_sheet.java
[17492] 2009-07-31 12:41:48.191 INFO: modified viewpoint/src/iRed/Tda/Pmo/Projects/ProjectPropertyQuerier.java
[17492] 2009-07-31 12:41:48.193 INFO: modified viewpoint/src/iRed/Wfl/Dis/PostRegistratieSysteemBean.java
[17492] 2009-07-31 12:44:50.680 INFO: Committed revision 1366.
[17492] 2009-07-31 12:44:50.875 INFO: Profile data written to "/home/jal/commit.callgrind".
184.886  return code 0

I don't know if it's needed but I attach the callgrind for this one too...