diff --git a/gojaRuntime/gojaRuntime.go b/gojaRuntime/gojaRuntime.go
index 6c78035..fb7c453 100644
--- a/gojaRuntime/gojaRuntime.go
+++ b/gojaRuntime/gojaRuntime.go
@@ -24,10 +24,11 @@ type (
 	}
 
 	actionResult struct {
-		ConsoleLog   []interface{} `json:"console_log"`
-		ConsoleError []interface{} `json:"console_error"`
-		Context      *jsContext    `json:"context"`
-		ExitResult   interface{}   `json:"exit_result"`
+		ConsoleLog   []interface{}                       `json:"console_log"`
+		ConsoleError []interface{}                       `json:"console_error"`
+		Context      *jsContext                          `json:"context"`
+		ExitResult   interface{}                         `json:"exit_result"`
+		RunMetadata  *runtimesRegistry.ExecutionMetadata `json:"run_metadata"`
 	}
 	introspectedExport struct {
 		value    interface{}
@@ -46,6 +47,11 @@ type (
 	}
 )
 
+// ExecutionMetadata implements runtime_registry.ExecutionResult.
+func (a *actionResult) ExecutionMetadata() runtimesRegistry.ExecutionMetadata {
+	return *a.RunMetadata
+}
+
 // BindingsFrom implements runtime_registry.IntrospectedExport.
 func (i introspectedExport) BindingsFrom(exportName string) map[string]runtimesRegistry.BindingSettings {
 	return i.bindings
@@ -162,14 +168,16 @@ func init() {
 	registry.RegisterNativeModule("url", urlModule.Require)
 }
 
+var __nativeModules = nativeModules{
+	registered: map[string]*NativeModule{},
+}
+
 func newGojaRunner() runtimesRegistry.Runner {
 	runner := GojaRunnerV1{
 		cache: &gojaCache{
 			cache: map[string]*goja.Program{},
 		},
-		nativeModules: nativeModules{
-			registered: map[string]*NativeModule{},
-		},
+		nativeModules: __nativeModules,
 	}
 	return &runner
 }
@@ -228,13 +236,13 @@ type NativeModule struct {
 	name      string
 }
 
-func (runner GojaRunnerV1) RegisterNativeAPI(name string) *NativeModule {
+func RegisterNativeAPI(name string) *NativeModule {
 	result := &NativeModule{
 		functions: map[string]func(binding runtimesRegistry.BindingSettings, jsContext JsContext, args ...interface{}) (interface{}, error){},
 		modules:   map[string]*NativeModule{},
 		name:      name,
 	}
-	runner.nativeModules.registered[name] = result
+	__nativeModules.registered[name] = result
 	return result
 }
 
@@ -344,6 +352,7 @@ func (e *GojaRunnerV1) Execute(ctx context.Context, workflow runtimesRegistry.Wo
 	}
 
 	executionResult.ExitResult = promise.Result().Export()
+	executionResult.RunMetadata.ExecutionDuration = time.Since(executionResult.RunMetadata.StartedAt)
 
 	return executionResult, nil
 }
@@ -360,6 +369,9 @@ func (runner *GojaRunnerV1) setupVM(ctx context.Context, vm *goja.Runtime, workf
 		Context: &jsContext{
 			data: map[string]interface{}{},
 		},
+		RunMetadata: &runtimesRegistry.ExecutionMetadata{
+			StartedAt: time.Now(),
+		},
 	}
 
 	for name, binding := range workflow.RequestedBindings {
diff --git a/registry/runtimeRegistry.go b/registry/runtimeRegistry.go
index 2a3a30d..df78524 100644
--- a/registry/runtimeRegistry.go
+++ b/registry/runtimeRegistry.go
@@ -32,11 +32,6 @@ type (
 		Settings map[string]interface{} `json:"settings"`
 	}
 
-	// Bindings struct {
-	// 	Global map[string]ModuleBinding `json:"global"`
-	// 	Native map[string]ModuleBinding `json:"native"`
-	// }
-
 	RuntimeLimits struct {
 		MaxExecutionDuration time.Duration `json:"max_execution_duration"`
 	}
@@ -52,7 +47,12 @@ type (
 		GetValueAsMap(key string) (map[string]interface{}, error)
 	}
 
+	ExecutionMetadata struct {
+		StartedAt         time.Time     `json:"started_at"`
+		ExecutionDuration time.Duration `json:"execution_duration"`
+	}
 	ExecutionResult interface {
+		ExecutionMetadata() ExecutionMetadata
 		GetExitResult() interface{}
 		GetConsoleLog() []interface{}
 		GetConsoleError() []interface{}
diff --git a/runtime_test.go b/runtime_test.go
index 3d9d618..dcd5b32 100644
--- a/runtime_test.go
+++ b/runtime_test.go
@@ -50,6 +50,8 @@ func Test_GojaPrecompiledRuntime(t *testing.T) {
 		idTokenMap, err := result.GetContext().GetValueAsMap("idToken")
 		assert.Nil(err)
 		assert.Equal("bbb", idTokenMap["aaa"])
+		assert.Greater(result.ExecutionMetadata().ExecutionDuration.Nanoseconds(), int64(1))
+		assert.False(result.ExecutionMetadata().StartedAt.IsZero())
 	}
 }
 
@@ -113,7 +115,7 @@ func testExecution(workflow projectBundler.KindeWorkflow, assert *assert.Asserti
 func getGojaRunner() registry.Runner {
 	runtime, _ := GetRuntime("goja")
 
-	kindeAPI := runtime.(*gojaRuntime.GojaRunnerV1).RegisterNativeAPI("kinde")
+	kindeAPI := gojaRuntime.RegisterNativeAPI("kinde")
 	kindeAPI.RegisterNativeFunction("fetch", func(binding registry.BindingSettings, jsContext gojaRuntime.JsContext, args ...interface{}) (interface{}, error) {
 		return "fetch response", nil
 	})