chore: do not create new noops on every call

src/api/context.ts

@@ -23,6 +23,7 @@ import {
 } from '../internal/global-utils';
 
 const API_NAME = 'context';
+const NOOP_CONTEXT_MANAGER = new NoopContextManager();
 
 /**
  * Singleton object which represents the entry point to the OpenTelemetry Context API
@@ -86,7 +87,7 @@ export class ContextAPI {
   }
 
   private _getContextManager(): ContextManager {
-    return getGlobal(API_NAME) || new NoopContextManager();
+    return getGlobal(API_NAME) || NOOP_CONTEXT_MANAGER;
   }
 
   /** Disable and remove the global context manager */

src/api/propagation.ts

@@ -30,6 +30,7 @@ import {
 } from '../propagation/TextMapPropagator';
 
 const API_NAME = 'propagation';
+const NOOP_TEXT_MAP_PROPAGATOR = new NoopTextMapPropagator();
 
 /**
  * Singleton object which represents the entry point to the OpenTelemetry Propagation API
@@ -101,6 +102,6 @@ export class PropagationAPI {
   }
 
   private _getGlobalPropagator(): TextMapPropagator {
-    return getGlobal(API_NAME) || new NoopTextMapPropagator();
+    return getGlobal(API_NAME) || NOOP_TEXT_MAP_PROPAGATOR;
   }
 }

src/trace/ProxyTracerProvider.ts

@@ -28,7 +28,7 @@ import { NoopTracerProvider } from './NoopTracerProvider';
  *   all tracers already provided will use the provided delegate implementation.
  */
 export class ProxyTracerProvider implements TracerProvider {
-  private _delegate?: TracerProvider;
+  private _delegate: TracerProvider = new NoopTracerProvider();
 
   /**
    * Get a {@link ProxyTracer}
@@ -41,7 +41,7 @@ export class ProxyTracerProvider implements TracerProvider {
   }
 
   getDelegate(): TracerProvider {
-    return this._delegate ?? new NoopTracerProvider();
+    return this._delegate;
   }
 
   /**
@@ -52,6 +52,6 @@ export class ProxyTracerProvider implements TracerProvider {
   }
 
   getDelegateTracer(name: string, version?: string): Tracer | undefined {
-    return this._delegate?.getTracer(name, version);
+    return this._delegate.getTracer(name, version);
   }
 }