graph: Avoid unnecessary entity deep clone in as_modifications#6362
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graph: Avoid unnecessary entity deep clone in as_modifications#6362
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Use Arc::try_unwrap to move the entity out of the Arc without cloning when the refcount is 1 (the common case after remove() from the LFU cache). Also make merge_remove_null_fields return whether it changed anything, replacing the post-merge full entity comparison.
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Use Arc::try_unwrap to move the entity out of the Arc without cloning when the refcount is 1 (the common case after remove() from the LFU cache). Also make merge_remove_null_fields return whether it changed anything, replacing the post-merge full entity comparison.