Cache SourceInfo::getScopeInfo

src/codegen/codegen.cpp

@@ -63,6 +63,7 @@ SourceInfo::SourceInfo(BoxedModule* m, ScopingAnalysis* scoping, FutureFlags fut
                        std::vector<AST_stmt*> body, std::string fn)
     : parent_module(m),
       scoping(scoping),
+      scope_info(NULL),
       future_flags(future_flags),
       ast(ast),
       cfg(NULL),

src/codegen/irgen/hooks.cpp

@@ -127,7 +127,9 @@ Box* SourceInfo::getDocString() {
 }
 
 ScopeInfo* SourceInfo::getScopeInfo() {
-    return scoping->getScopeInfoForNode(ast);
+    if (!scope_info)
+        scope_info = scoping->getScopeInfoForNode(ast);
+    return scope_info;
 }
 
 LivenessAnalysis* SourceInfo::getLiveness() {

src/core/types.h

@@ -328,6 +328,7 @@ class SourceInfo {
 public:
     BoxedModule* parent_module;
     ScopingAnalysis* scoping;
+    ScopeInfo* scope_info;
     FutureFlags future_flags;
     AST* ast;
     CFG* cfg;