SOF-6584: js spread operator instead deepClone fro in_memory entity

src/entity/in_memory.js

@@ -1,7 +1,7 @@
 import lodash from "lodash";
 
 // import { ESSE } from "@exabyte-io/esse.js";
-import { deepClone } from "../utils/clone";
+import { clone, deepClone } from "../utils/clone";
 import { getSchemaByClassName } from "../utils/schemas";
 
 // TODO: https://exabyte.atlassian.net/browse/SOF-5946
@@ -12,8 +12,11 @@ export class InMemoryEntity {
         return new this.prototype.constructor(config);
     }
 
-    constructor(config) {
-        this._json = deepClone(config || {});
+    // Override if config deepClone is needed
+    static _isDeepCloneRequired = false;
+
+    constructor(config = {}) {
+        this._json = this.constructor._isDeepCloneRequired ? deepClone(config) : clone(config);
     }
 
     /**
@@ -46,11 +49,24 @@ export class InMemoryEntity {
 
     /**
      * @summary Array of fields to exclude from resulted JSON
-     * @param exclude {String[]}
+     * @param {String[]} exclude
      */
     toJSON(exclude = []) {
-        const config = deepClone(lodash.omit(this._json, exclude));
-        return this.clean(config);
+        return this.constructor._isDeepCloneRequired
+            ? this.toJSONSafe(exclude)
+            : this.toJSONQuick(exclude);
+    }
+
+    toJSONSafe(exclude = []) {
+        const config = lodash.omit(this._json, exclude);
+
+        return this.clean(deepClone(config));
+    }
+
+    toJSONQuick(exclude = []) {
+        const config = lodash.omit(this._json, exclude);
+
+        return this.clean(clone(config));
     }
 
     /**
@@ -90,10 +106,12 @@ export class InMemoryEntity {
 
     isValid() {
         const ctx = this.schema.newContext();
-        ctx.validate(this.toJSON());
+        const json = this.toJSON();
+
+        ctx.validate(json);
 
         if (!ctx.isValid()) {
-            console.log(JSON.stringify(this.toJSON()));
+            console.log(JSON.stringify(json));
             if (ctx.getErrorObject) {
                 console.log(ctx.getErrorObject());
             }

src/utils/clone.js

@@ -2,3 +2,7 @@
 export function deepClone(obj) {
     return JSON.parse(JSON.stringify(obj));
 }
+
+export function clone(obj) {
+    return { ...obj };
+}