1 files changed, 16 insertions, 4 deletions
diff --git a/functiongraphblock.cpp b/functiongraphblock.cpp
index af330497..436339f6 100644
--- a/functiongraphblock.cpp
+++ b/functiongraphblock.cpp
@@ -27,6 +27,8 @@ using namespace std;
 FunctionGraphBlock::FunctionGraphBlock(BNFunctionGraphBlock* block)
 {
 	m_object = block;
+	m_cachedLinesValid = false;
+	m_cachedEdgesValid = false;
 }
 
 
@@ -72,8 +74,11 @@ int FunctionGraphBlock::GetHeight() const
 }
 
 
-vector<DisassemblyTextLine> FunctionGraphBlock::GetLines() const
+const vector<DisassemblyTextLine>& FunctionGraphBlock::GetLines()
 {
+	if (m_cachedLinesValid)
+		return m_cachedLines;
+
 	size_t count;
 	BNDisassemblyTextLine* lines = BNGetFunctionGraphBlockLines(m_object, &count);
 
@@ -96,12 +101,17 @@ vector<DisassemblyTextLine> FunctionGraphBlock::GetLines() const
 	}
 
 	BNFreeDisassemblyTextLines(lines, count);
-	return result;
+	m_cachedLines = result;
+	m_cachedLinesValid = true;
+	return m_cachedLines;
 }
 
 
-vector<FunctionGraphEdge> FunctionGraphBlock::GetOutgoingEdges() const
+const vector<FunctionGraphEdge>& FunctionGraphBlock::GetOutgoingEdges()
 {
+	if (m_cachedEdgesValid)
+		return m_cachedEdges;
+
 	size_t count;
 	BNFunctionGraphEdge* edges = BNGetFunctionGraphBlockOutgoingEdges(m_object, &count);
 
@@ -117,5 +127,7 @@ vector<FunctionGraphEdge> FunctionGraphBlock::GetOutgoingEdges() const
 	}
 
 	BNFreeFunctionGraphBlockOutgoingEdgeList(edges, count);
-	return result;
+	m_cachedEdges = result;
+	m_cachedEdgesValid = true;
+	return m_cachedEdges;
 }