diff --git a/swh/loader/svn/ra.py b/swh/loader/svn/ra.py
--- a/swh/loader/svn/ra.py
+++ b/swh/loader/svn/ra.py
@@ -36,6 +36,7 @@
 from subvertpy.ra import Auth, RemoteAccess, get_username_provider
 
 from swh.model import from_disk, hashutil
+from swh.model.from_disk import DiskBackedContent
 from swh.model.model import Content, Directory, SkippedContent
 
 if TYPE_CHECKING:
@@ -205,6 +206,8 @@
         self.svnrepo = svnrepo
         self.editor = svnrepo.swhreplay.editor
 
+        self.editor.modified_paths.add(path)
+
     def change_prop(self, key: str, value: str) -> None:
         if key == properties.PROP_EXECUTABLE:
             if value is None:  # bit flip off
@@ -392,6 +395,10 @@
         self.editor = svnrepo.swhreplay.editor
         self.externals: Dict[str, Tuple[str, Optional[int], bool]] = {}
 
+        # repository root dir has empty path
+        if path:
+            self.editor.modified_paths.add(path)
+
     def remove_child(self, path: bytes) -> None:
         """Remove a path from the current objects.
 
@@ -424,6 +431,8 @@
             if state_path.startswith(fullpath + b"/"):
                 del self.file_states[state_path]
 
+        self.editor.modified_paths.discard(path)
+
     def open_directory(self, path: str, *args) -> DirEditor:
         """Updating existing directory.
 
@@ -617,6 +626,9 @@
                 self.remove_child(dest_fullpath)
                 # copy exported path to reconstructed filesystem
                 fullpath = os.path.join(self.rootpath, dest_fullpath)
+
+                self.editor.external_paths.add(dest_fullpath)
+                self.editor.modified_paths.add(dest_fullpath)
                 # update from_disk model and store external paths
                 self.editor.external_paths.add(dest_fullpath)
                 if os.path.isfile(temp_path):
@@ -629,13 +641,16 @@
                     self.directory[dest_fullpath] = from_disk.Directory.from_disk(
                         path=fullpath
                     )
+                    external_paths = set()
                     for root, dirs, files in os.walk(fullpath):
-                        self.editor.external_paths.update(
+                        external_paths.update(
                             [
                                 os.path.join(root.replace(self.rootpath + b"/", b""), p)
                                 for p in chain(dirs, files)
                             ]
                         )
+                    self.editor.external_paths.update(external_paths)
+                    self.editor.modified_paths.update(external_paths)
 
                 # ensure hash update for the directory with externals set
                 self.directory[self.path].update_hash(force=True)
@@ -713,6 +728,8 @@
         self.externals_cache: Dict[Tuple[str, Optional[int]], str] = {}
         self.svnrepo = svnrepo
         self.revnum = None
+        # to store the set of paths added or modified when replaying a revision
+        self.modified_paths: Set[bytes] = set()
 
     def set_target_revision(self, revnum) -> None:
         self.revnum = revnum
@@ -724,6 +741,8 @@
         pass
 
     def open_root(self, base_revnum: int) -> DirEditor:
+        # a new revision is being replayed so clear the modified_paths set
+        self.modified_paths.clear()
         return DirEditor(
             self.directory,
             rootpath=self.rootpath,
@@ -773,7 +792,7 @@
     def compute_objects(
         self, rev: int
     ) -> Tuple[List[Content], List[SkippedContent], List[Directory]]:
-        """Compute objects at revisions rev.
+        """Compute objects added or modified at revisions rev.
         Expects the state to be at previous revision's objects.
 
         Args:
@@ -785,7 +804,23 @@
 
         """
         self.replay(rev)
-        return from_disk.iter_directory(self.directory)
+
+        contents: List[Content] = []
+        skipped_contents: List[SkippedContent] = []
+        directories: List[Directory] = []
+
+        directories.append(self.editor.directory.to_model())
+        for path in self.editor.modified_paths:
+            obj = self.directory[path].to_model()
+            obj_type = obj.object_type
+            if obj_type in (Content.object_type, DiskBackedContent.object_type):
+                contents.append(obj.with_data())
+            elif obj_type == SkippedContent.object_type:
+                skipped_contents.append(obj)
+            elif obj_type == Directory.object_type:
+                directories.append(obj)
+
+        return contents, skipped_contents, directories
 
 
 @click.command()
diff --git a/swh/loader/svn/tests/test_loader.py b/swh/loader/svn/tests/test_loader.py
--- a/swh/loader/svn/tests/test_loader.py
+++ b/swh/loader/svn/tests/test_loader.py
@@ -149,6 +149,7 @@
     actual_visit = assert_last_visit_matches(
         swh_storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     loader2 = SvnLoaderFromRemoteDump(
         swh_storage, repo_url, temp_directory=loading_path
@@ -181,6 +182,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     stats = get_stats(loader.storage)
     assert stats == {
@@ -215,6 +217,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     assert loader.load() == {"status": "uneventful"}
     visit_status2 = assert_last_visit_matches(
@@ -287,6 +290,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     archive_path2 = os.path.join(datadir, "pkg-gourmet-tampered-rev6-log.tgz")
     repo_tampered_url = prepare_repository_from_archive(
@@ -305,6 +309,7 @@
         type="svn",
         snapshot=hash_to_bytes("5aa61959e788e281fd6e187053d0f46c68e8d8bb"),
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     stats = get_stats(loader.storage)
     assert stats["origin"] == 1
@@ -335,6 +340,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(GOURMET_SNAPSHOT, loader.storage)
 
     archive_path = os.path.join(datadir, "pkg-gourmet-with-updates.tgz")
     repo_updated_url = prepare_repository_from_archive(
@@ -422,6 +428,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(GOURMET_SNAPSHOT, loader.storage)
 
     start_revision = loader.storage.revision_get(
         [hash_to_bytes("95edacc8848369d6fb1608e887d6d2474fd5224f")]
@@ -899,6 +906,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_svn_loader_from_dump_archive(swh_storage, datadir, tmp_path):
@@ -1068,6 +1076,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     assert get_stats(loader.storage) == {
         "content": 2,
@@ -1128,6 +1137,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # check loaded objects are those expected
     assert get_stats(loader.storage) == {
@@ -1214,6 +1224,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # check loaded objects are those expected
     assert get_stats(loader.storage) == {
@@ -1273,6 +1284,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     paths = get_head_revision_paths_info(loader)
     # end of lines should not have been processed
@@ -1315,6 +1327,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="partial", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     assert get_stats(loader.storage) == {
         "content": 2,
@@ -1402,6 +1415,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_last_revision_divergence(swh_storage, datadir, tmp_path):
@@ -1424,6 +1438,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(GOURMET_SNAPSHOT, loader.storage)
 
 
 def test_loader_delete_directory_while_file_has_same_prefix(
@@ -1471,6 +1486,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_svn_loader_incremental(swh_storage, repo_url, tmp_path):
@@ -1499,6 +1515,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # second commit
     add_commit(
@@ -1519,6 +1536,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # third commit
     add_commit(
@@ -1539,6 +1557,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_svn_loader_incremental_replay_start_with_empty_directory(
@@ -1562,6 +1581,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # second commit
     add_commit(
@@ -1653,6 +1673,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_svn_add_property_on_link(swh_storage, repo_url, tmp_path):
@@ -1699,6 +1720,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_svn_link_parsing(swh_storage, repo_url, tmp_path):
@@ -1745,6 +1767,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_svn_empty_local_dir_before_post_load(swh_storage, datadir, tmp_path):
@@ -1777,6 +1800,7 @@
         type="svn",
         snapshot=GOURMET_SNAPSHOT.id,
     )
+    check_snapshot(GOURMET_SNAPSHOT, loader.storage)
 
 
 def test_loader_svn_add_property_on_directory_link(swh_storage, repo_url, tmp_path):
@@ -1823,6 +1847,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 @pytest.fixture
@@ -1892,6 +1917,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     # third commit
     add_commit(
@@ -1912,6 +1938,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_with_invalid_svn_externals(swh_storage, repo_url, tmp_path):
@@ -1953,6 +1980,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_with_valid_externals_modification(
@@ -2027,6 +2055,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_with_valid_externals_and_versioned_path(
@@ -2093,6 +2122,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_with_invalid_externals_and_versioned_path(
@@ -2134,6 +2164,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_set_externals_then_remove_and_add_as_local(
@@ -2190,6 +2221,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_set_invalid_externals_then_remove(swh_storage, repo_url, tmp_path):
@@ -2227,6 +2259,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_loader_set_externals_with_versioned_file_overlap(
@@ -2293,6 +2326,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
 
 def test_dump_loader_relative_externals_detection(
@@ -2343,6 +2377,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
     assert loader.svnrepo.has_relative_externals
 
     add_commit(
@@ -2364,6 +2399,7 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
     assert not loader.svnrepo.has_relative_externals
 
 
@@ -2421,5 +2457,6 @@
     assert_last_visit_matches(
         loader.storage, repo_url, status="full", type="svn",
     )
+    check_snapshot(loader.snapshot, loader.storage)
 
     assert (external_url, None) in loader.svnrepo.swhreplay.editor.externals_cache