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Optimize subnode copying by avoiding deepcopy in merge functions #22

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Optimize subnode copying by avoiding deepcopy in merge functions #22

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16 changes: 12 additions & 4 deletions pyfdt/pyfdt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -624,10 +624,18 @@ def merge(self, node):
if isinstance(obj, (FdtNode, FdtProperty))]:
index = self._find(subnode.get_name())
if index is None:
dup = deepcopy(subnode)
if isinstance(subnode, FdtNode):
dup.set_parent_node(self)
self.append(dup)
# avoid deepcopy for large binary blobs
if isinstance(subnode, FdtPropertyBytes):
# shallow copy of bytes for FdtPropertyBytes
dup = FdtPropertyBytes(subnode.name, list(subnode.bytes))
elif isinstance(subnode, FdtNode):
dup = FdtNode(subnode.name)
for child in subnode.subdata:
dup.append(child)
dup.set_parent_node(self)
else:
dup = copy(subnode)
self.append(dup)
elif isinstance(subnode, FdtNode):
self.subdata[index].merge(subnode)
else:
Expand Down