Optimizations (#4135)

* removes costly json serialization to InMemoryCacheAdapter

* Always cache a copy of the array

* Use own mapValues

* Makes sure we dont make unnecessary calls to the logger

* Do not bypass loggers with silent logging (only applies to stdout)

* warn is not warning

* use ===

* Wrap logRequest / logResponse in the loggerController for more granular control

Also give the ability to pass functions to the logger so we don't serialize too early in JSON (costly)

* reconfiguring winston would override the transports levels and make subsequent tests fail

src/Adapters/Cache/InMemoryCacheAdapter.js

@@ -7,18 +7,15 @@ export class InMemoryCacheAdapter {
   }
 
   get(key) {
-    return new Promise((resolve) => {
-      const record = this.cache.get(key);
-      if (record == null) {
-        return resolve(null);
-      }
-
-      return resolve(JSON.parse(record));
-    })
+    const record = this.cache.get(key);
+    if (record === null) {
+      return Promise.resolve(null);
+    }
+    return Promise.resolve(record);
   }
 
   put(key, value, ttl) {
-    this.cache.put(key, JSON.stringify(value), ttl);
+    this.cache.put(key, value, ttl);
     return Promise.resolve();
   }