Ho sviluppato questo listato in JavaScript ES5 e non voglio funzionalita’ di ES6. Vorrei un’analisi dettagliata di questo codice in italiano, focalizzandosi sui seguenti aspetti:
1.	Ridondanza di codice o controlli logici: Evidenziare eventuali duplicazioni o controlli logici non necessari.
2.	Ottimizzazioni: Indicare possibili miglioramenti per aumentare l’efficienza del codice.
3.	Compattazioni: Suggerire modi per rendere il codice più compatto.
4.	Miglioramento dell’efficienza e della velocità di esecuzione: Consigli su come ottimizzare le prestazioni del codice.
Per ciascuno dei punti da 1 a 4, sarebbero graditi suggerimenti specifici specifici indicando il PRIMA, cioe' il codice orginale e il DOPO, con le modifiche da te proposte.


var CONFIG = {
    ORDER_SIDE: 'BID',
    SIZE: 1,
    MAX_OPERATIONS: 3,
    LEVELS: { BID: 6, ASK: 6 },
    SECONDS: 5,
    TICK: 1,
    MONITORING_MODE: 'MONITORA_yourlevel',
    SIDES: ['BID', 'ASK'],
    TYPES: ['Price', 'Quantity']
};



var BookUtils = {
    getData: BookDataManager.getData
};

var OrderUpdater = {
    updateOrderContext: function(order, side, price) {
        if (order == null || order.Price !== price) {
            UserContext.order.current = order;
            UserContext.prices[side].oldLevel = price;
        }
        return order;
    }
};

var OrderExecutor = {
    execOrder: function(side, stock, price, size) {
        return (side === 'BID') ? OrderManager.Buy(stock, price, size) : OrderManager.Sell(stock, price, size);
    }
};

var OrderProcessor = {
    processOrModOrder: function(side, stock, price) {
        var currentOrder = UserContext.order.current;
        var order = currentOrder
            ? OrderManager.Modify(currentOrder.OrderCode, price)
            : OrderExecutor.execOrder(side, stock, price, CONFIG.SIZE);
        return OrderUpdater.updateOrderContext(order, side, price);
    }
};

var OrderDeleter = {
    deleteOrder: function(orderCode) {
        return OrderManager.Delete(orderCode);
    }
};

var OrderUtils = {
    execOrder: OrderExecutor.execOrder,
    updateOrderContext: OrderUpdater.updateOrderContext,
    processOrModOrder: OrderProcessor.processOrModOrder,
    deleteOrder: OrderDeleter.deleteOrder
};
var PriceHelper = {
    priceDirection: function(targetPrice, oldPrice) {
        return (targetPrice > oldPrice) ? 1 : (targetPrice < oldPrice) ? -1 : 0;
    }
};

function mapBookData(originalBook) {
    var levels = CONFIG.LEVELS;
    var BID = originalBook.Bid;
    var ASK = originalBook.Ask;

    function mapSide(sideData, maxLevel) {
        var result = { Prices: new Array(maxLevel + 1), Quantities: new Array(maxLevel + 1) };
        if (sideData && typeof sideData.Price === 'function') {
            for (var level = 0; level <= maxLevel; level++) {
                result.Prices[level] = sideData.Price(level);
                result.Quantities[level] = sideData.Quantity(level);
            }
        }
        return result;
    }
    return {
        BID: mapSide(BID, levels.BID),
        ASK: mapSide(ASK, levels.ASK)
    };
}

function getTargetPriceLevel(side) {
    return (CONFIG.MONITORING_MODE === 'MONITORA_1Level' ? 0 : CONFIG.LEVELS[side] - 1);
}

function StateManager() {
    this.lastValues = { BID: {}, ASK: {} };
}

StateManager.prototype.updateLastValues = function(state) {
    CONFIG.SIDES.forEach(function(side) {
        var sideKey = side.toLowerCase();
        this.setValue(side, 'price', state[sideKey + 'Price']);
        this.setValue(side, 'quantity', state[sideKey + 'Quantity']);
    }, this);
};

StateManager.prototype.getValue = function(side, type) {
    return this.lastValues[side][type];
};

StateManager.prototype.setValue = function(side, type, value) {
    this.lastValues[side][type] = value;
};

var stateManager = new StateManager();

var BookDataManager = (function() {
    function getData(book, side, level, type) {
        var sideData = book && book[side];
        return sideData && sideData[type + 's'] ? sideData[type + 's'][level] : undefined;
    }
    return {
        getData: getData
    };
})();

var BookStateManager = (function() {
    var cachedBookData = { BID: null, ASK: null };

    function createSideData(book, side, levels) {
        if (!cachedBookData[side] || cachedBookData[side].book !== book) {
            var bookData = cachedBookData[side] = { book: book };
            ['Price', 'Quantity'].forEach(function(type) {
                bookData[type.charAt(0)] = BookDataManager.getData(book, side, levels, type);
            });
        }
        return cachedBookData[side];
    }
    return {
        createSideData: createSideData
    };
})();

var BookStateChecker = (function() {
function isArrayChanged(type, side, newState, cachedState, maxLevel) {
    var cachedArray = cachedState[side][type];
    var newArray = newState[side][type];
    for (var i = 0; i < maxLevel; i++) {
        if (cachedArray[i] !== newArray[i]) return true;
    }
    return false;
}

function isSideChanged(side, newState, cachedState) {
    var maxLevel = CONFIG.LEVELS[side];
    return ['P', 'Q'].some(function(type) {
        return isArrayChanged(type, side, newState, cachedState, maxLevel);
    });
}

    function hasBookStateChanged(newState, cachedState) {
        return isSideChanged('BID', newState, cachedState) || isSideChanged('ASK', newState, cachedState);
    }
    return {
        isArrayChanged: isArrayChanged,
        isSideChanged: isSideChanged,
        hasBookStateChanged: hasBookStateChanged
    };
})();

var BookStateUpdater = (function() {
    var cachedBookState = null;

function getBookState(book) {
    var hasChanged = !cachedBookState || BookStateChecker.hasBookStateChanged(book, cachedBookState);
    if (hasChanged) {
        cachedBookState = {
            BID: BookStateManager.createSideData(book, 'BID', CONFIG.LEVELS.BID),
            ASK: BookStateManager.createSideData(book, 'ASK', CONFIG.LEVELS.ASK)
        };
        stateManager.updateLastValues({
            bidPrice: cachedBookState.BID.P[0],
            bidQuantity: cachedBookState.BID.Q[0],
            askPrice: cachedBookState.ASK.P[0],
            askQuantity: cachedBookState.ASK.Q[0]
        });
    }
    return cachedBookState;
}
    return {
        getBookState: getBookState
    };
})();

function initializeUserContext(book, pricesBID, pricesASK, sideLevels) {
    return {
        book: book,
        order: { current: null },
        status: { run: true, secondCount: 0, numOperazione: 0 },
        prices: {
            BID: { current: pricesBID[0], oldLevel: pricesBID[sideLevels.BID] || pricesBID[0] },
            ASK: { current: pricesASK[0], oldLevel: pricesASK[sideLevels.ASK] || pricesASK[0] }
        },
        targetPriceLevels: sideLevels
    };
}

function setupTradeContext() {
    var originalBook = mapBookData(Book(ps));
    var isMonitorOneLevel = (CONFIG.MONITORING_MODE === 'MONITORA_1Level');
var levels = CONFIG.LEVELS;
var sideLevels = {
    BID: isMonitorOneLevel ? 0 : levels.BID - 1,
    ASK: isMonitorOneLevel ? 0 : levels.ASK - 1
};
    var pricesBID = originalBook.BID.Prices;
    var pricesASK = originalBook.ASK.Prices;

    UserContext = initializeUserContext(originalBook, pricesBID, pricesASK, sideLevels);
    logger.initializeOrderAndLog();
    manageCycle();
}

function manageCycle() {
    if (++UserContext.status.secondCount >= CONFIG.SECONDS) {
        if (!checkOperations()) {
            UserContext.book = mapBookData(Book(ps));
            priceUpdate(CONFIG.ORDER_SIDE, UserContext.book, UserContext.status, UserContext);
        }
        UserContext.status.secondCount = 0;
    }
}

function changesDetected() {
    var newBook = Book(ps);
    return BookStateChecker.hasBookStateChanged(newBook, UserContext.book);
}

function updateOrderAndContext(side, book, userCtx, stock, price) {
    var newOrder = OrderUtils.processOrModOrder(side, stock, price);
    if (newOrder) {
        userCtx.prices[side] = { current: price, oldLevel: price };
    }
    return newOrder;
}

function priceUpdate(side, book, status, userCtx) {
    var targetPriceLevel = userCtx.targetPriceLevels[side];
    var targetPrice = book[side].Prices[targetPriceLevel];
    var oldPrice = userCtx.prices[side].oldLevel;

    function handlePriceChange(side, targetPrice, oldPrice, userCtx, book, status) {
    var newOrder = updateOrderAndContext(side, book, userCtx, ps, targetPrice);
    if (newOrder) {
        var direction = PriceHelper.priceDirection(targetPrice, oldPrice);
        logger.logLevelChange(CONFIG.LEVELS[side] + direction, userCtx.targetPriceLevels[side]);
        status.secondCount = 0;
        status.numOperazione++;
    }
}
   if (targetPrice !== oldPrice) {
    handlePriceChange(side, targetPrice, oldPrice, userCtx, book, status);
  }  
}

function checkOperations() {
    var status = UserContext.status;
    if (status.numOperazione >= CONFIG.MAX_OPERATIONS) {
        return cancelCurrentOrder(status);
    }
    return false;
}

function cancelCurrentOrder(status) {
    var currentOrder = UserContext.order.current;
    if (!currentOrder) return false;
    OrderUtils.deleteOrder(currentOrder.OrderCode);
    logger.log('Order Deleted', { orderCode: currentOrder.OrderCode });
    status.run = false;
    return true;
}

function onPriceEvent(ctx) {
    var price = Val(ps, "LAST");
    if (ctx.lastPrice === price) return;
    logger.logPriceChange(ctx, price);
}

function onTimeEvent(ctx) {
    ctx.status.secondCount++;
    manageCycle();
}

function handleEvent(context, type) {
    if (type === TSEventType.Price) {
        onPriceEvent(context);
    } else if (type === TSEventType.Time) {
        onTimeEvent(context);
    }
}

function marketEventFactory(ps, bookProvider, bookMapper, eventHandler, userContext, systemContext) {
    return function() {
        if (!userContext.status.run) return;
        var originalBook = bookProvider(ps);
        var mappedBook = bookMapper(originalBook);
        userContext.book = mappedBook;
        eventHandler(userContext, systemContext.EventType);
    };
}

if (SystemContext.IsFirst) {
    setupTradeContext();
}

var marketEventInstance = marketEventFactory(ps, Book, mapBookData, handleEvent, UserContext, SystemContext);

marketEventInstance();