src: cache context lookup in vectored io loops

src/env-inl.h

@@ -897,7 +897,7 @@ v8::Local<v8::Context> Environment::context() const {
   return principal_realm()->context();
 }
 
-Realm* Environment::principal_realm() const {
+PrincipalRealm* Environment::principal_realm() const {
   return principal_realm_.get();
 }
 

src/env.h

@@ -886,7 +886,7 @@ class Environment final : public MemoryRetainer {
   // Get the context with an explicit realm instead when possible.
   // Deprecate soon.
   inline v8::Local<v8::Context> context() const;
-  inline Realm* principal_realm() const;
+  inline PrincipalRealm* principal_realm() const;
 
 #if HAVE_INSPECTOR
   inline inspector::Agent* inspector_agent() const {

src/node_realm-inl.h

@@ -5,6 +5,7 @@
 
 #include "node_context_data.h"
 #include "node_realm.h"
+#include "util-inl.h"
 
 namespace node {
 
@@ -46,6 +47,10 @@ inline v8::Isolate* Realm::isolate() const {
   return isolate_;
 }
 
+inline v8::Local<v8::Context> Realm::context() const {
+  return PersistentToLocal::Strong(context_);
+}
+
 inline Realm::Kind Realm::kind() const {
   return kind_;
 }

src/node_realm.cc

@@ -295,10 +295,6 @@ void Realm::VerifyNoStrongBaseObjects() {
   });
 }
 
-v8::Local<v8::Context> Realm::context() const {
-  return PersistentToLocal::Strong(context_);
-}
-
 // Per-realm strong value accessors. The per-realm values should avoid being
 // accessed across realms.
 #define V(PropertyName, TypeName)                                              \

src/node_realm.h

@@ -121,7 +121,7 @@ class Realm : public MemoryRetainer {
   inline Environment* env() const;
   inline v8::Isolate* isolate() const;
   inline Kind kind() const;
-  virtual v8::Local<v8::Context> context() const;
+  inline virtual v8::Local<v8::Context> context() const;
   inline bool has_run_bootstrapping_code() const;
 
   // Methods created using SetMethod(), SetPrototypeMethod(), etc. inside