Ho scritto questo listato in JavaScript ES5 e preferirei non utilizzare le funzionalità moderne di ES6. Vorrei un’analisi di questo listato in lingua italiana, con particolare attenzione ai seguenti punti   
:
1.	Ridondanza di codice o controlli logici: Identificare eventuali ripetizioni inutili o controlli logici superflui.
2.	Ottimizzazioni: Suggerire miglioramenti per rendere il codice più efficiente.
3.	Compattazioni: Proporre modi per rendere il codice più conciso.
4.	Ricerca di maggiore efficienza e velocità di esecuzione: Consigli su come migliorare le prestazioni del codice.
Per ogni punto da 1 a 4, apprezzerei suggerimenti specifici indicando il PRIMA, cioe' il codice orginale e il DOPO, con le modifiche da te proposte.
Versione 2
 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 separator = "---------------------------------------------------\r\n";

var StateManager = (function() {
    var lastValues = {
        BID: { price: null, quantity: null },
        ASK: { price: null, quantity: null }
    };

    return {
        updateLastValues: function(state) {
            lastValues.BID.price = state.bidPrice;
            lastValues.BID.quantity = state.bidQuantity;
            lastValues.ASK.price = state.askPrice;
            lastValues.ASK.quantity = state.askQuantity;
        },
        getValue: function(side, type) {
            return lastValues[side][type];
        },
        setValue: function(side, type, value) {
            lastValues[side][type] = value;
        }
    };
})();

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

    return {
        getBookState: function(book) {
            var newState = this.createBookState(book);
            var stateChanged = cachedBookState ? this.hasBookStateChanged(newState) : true;
            if (stateChanged) {
                cachedBookState = newState;
                StateManager.updateLastValues(newState);
            }
            return cachedBookState;
        },

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

        isSideChanged: function(side, newState) {
            var maxLevel = CONFIG.LEVELS[side];
            var cachedSide = cachedBookState.book[side];
            var newSide = newState.book[side];

return this.compareArrays(cachedSide.Prices, newSide.Prices, maxLevel) ||
       this.compareArrays(cachedSide.Quantities, newSide.Quantities, maxLevel);
        },

compareArrays: function(arr1, arr2, max) {
    return arr1.slice(0, max).join(',') !== arr2.slice(0, max).join(',');
},

createBookState: function(book) {
    var state = { book: book };
    var sides = CONFIG.SIDES;
    var levels = CONFIG.LEVELS;

    for (var i = 0, lenSides = sides.length; i < lenSides; i++) {
        var side = sides[i];
        state[side] = {
            Prices: this.getData(book, side, levels[side], 'Price'),
            Quantities: this.getData(book, side, levels[side], 'Quantity')
        };
    }
    return state;
},

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

function BookUtilsConstructor(BookStateManager) {
    this.KEYS = ['bidPrice', 'bidQuantity', 'askPrice', 'askQuantity'];
    this.SIDES = { BID: 'BID', ASK: 'ASK' };
    this.TYPES = { PRICE: 'Price', QUANTITY: 'Quantity' };
    this.getData = function(book, side, level, type) {
        return BookStateManager.getData(book, side, level, type);
    };
}

var BookUtils = new BookUtilsConstructor(BookStateManager);

var OrderUtils = {
    execOrder: function(side, stock, price, size) {
        return (side === 'BID') ? OrderManager.Buy(stock, price, size) : OrderManager.Sell(stock, price, size);
    },
    updateOrderContext: function(order, side, price) {
        UserContext.order.current = order;
        UserContext.prices[side].oldLevel = price;
        return order;
    },
    processOrModOrder: function(side, stock, price) {
        var currentOrder = UserContext.order.current;
        return currentOrder 
            ? (currentOrder.Price === price ? currentOrder : this.updateOrderContext(OrderManager.Modify(currentOrder.OrderCode, price), side, price))
            : this.updateOrderContext(this.execOrder(side, stock, price, CONFIG.SIZE), side, price);
    },
    deleteOrder: function(orderCode) {
        return OrderManager.Delete(orderCode);
    }
};

var logger = {
    messages: {
        'Initialization Complete': "Inizializzazione completata:\nBid Price 0: {bidPrice}\nAsk Price 0: {askPrice}\n",
        'Order Action': 'Ordine {action}: {orderCode}\n',
        'Order Deleted': 'Ordine cancellato: {orderCode}\n',
        'LevelChange': "Livello da {lastLevel} all'attuale livello {priceLevel}\n",
        'PriceChange': "Prezzo da {previousPrice} all'attuale prezzo {currentPrice}\nOra: {currentTime}\r\n" + separator,
        'message': "{message}\r\n" + separator
    },
    
    formatMessage: function(template, data) {
        return template.replace(/{(\w+)}/g, function(match, key) {
            return typeof data[key] !== 'undefined' ? data[key] : match;
        });
    },
    
    formatState: function(bookState) {
        var book = UserContext.book;
        var status = UserContext.status;
        return separator +
            "Bid Price \tBid Quant.\tAsk Price \tAsk Quant.\r\n" +
            separator +
            book.BID.Prices[0] + "\t\t" + book.BID.Quantities[0] +
            "\t\t" + book.ASK.Prices[0] + "\t\t" + book.ASK.Quantities[0] + "\r\n" +
            separator +
            "Numero Operazione: " + status.numOperazione + "\r\n" +
            separator;
    },

    log: function(type, data, includeFormattedState) {
        includeFormattedState = includeFormattedState !== false; 
        var template = this.messages[type];
        if (!template) return;
        
        var message = separator + this.formatMessage(template, data || {});
        if (includeFormattedState && (type === 'Initialization Complete' || type === 'LevelChange')) {
            message += this.formatState(BookStateManager.getBookState(UserContext.book));
        }
        Log(message);
    }
};

var Helper = {
    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: [], Quantities: [] };
        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 calculateTick(bidPrices, askPrices) {
    var MINIMUM_TICK = 0.005, DECIMAL_PLACES = 3;
    if (!bidPrices || !askPrices || bidPrices.length < 2 || askPrices.length < 2) {
        logger.log('message', { message: 'Tick calcolato: 0' });
        return 0;
    }
    var minDiff = Infinity;
    var len = Math.min(bidPrices.length, askPrices.length);
    for (var i = 0; i < len - 1; i++) {
        var bidDiff = Math.abs(bidPrices[i + 1] - bidPrices[i]);
        var askDiff = Math.abs(askPrices[i + 1] - askPrices[i]);
        var currentMin = (bidDiff < askDiff) ? bidDiff : askDiff;
        if (currentMin > 0 && currentMin < minDiff) {
            minDiff = currentMin;
            if (minDiff <= MINIMUM_TICK) break; 
        }
    }
    if (minDiff === Infinity) {
        logger.log('message', { message: 'Tick calcolato: 0' });
        return 0;
    }
    var tick = (Math.floor(minDiff / MINIMUM_TICK) * MINIMUM_TICK).toFixed(DECIMAL_PLACES);
    logger.log('message', { message: 'Tick calcolato: ' + tick });
    return parseFloat(tick);
}

function logFullBook() {
    var book = UserContext.book;
    var logParts = ["BID:\n"];
    var bidLevels = CONFIG.LEVELS.BID + 1;
    for (var level = 0; level < bidLevels; level++) {
        logParts.push("Level " + level + ": Price = " + book.BID.Prices[level] + ", Quantity = " + book.BID.Quantities[level] + "\n");
    }
    logParts.push(separator, "ASK:\n");
    var askLevels = CONFIG.LEVELS.ASK + 1;
    for (var level = 0; level < askLevels; level++) {
        logParts.push("Level " + level + ": Price = " + book.ASK.Prices[level] + ", Quantity = " + book.ASK.Quantities[level] + "\n");
    }
    logger.log('message', { message: logParts.join('') }, false);
}

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

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] },
            ASK: { current: pricesASK[0], oldLevel: pricesASK[sideLevels.ASK] }
        },
        targetPriceLevels: sideLevels
    };
}

function initializeOrder() {
    var originalBook = UserContext.book;
    var sideLevels = UserContext.targetPriceLevels;
    var initialPrice = BookUtils.getData(originalBook, CONFIG.ORDER_SIDE, sideLevels[CONFIG.ORDER_SIDE], 'Price');
    var initialOrder = OrderUtils.processOrModOrder(CONFIG.ORDER_SIDE, stock, initialPrice);
    return initialOrder;
}

function logInitialization(initialOrder) {
    logger.log('Initialization Complete', { 
        bidPrice: UserContext.prices.BID.current, 
        askPrice: UserContext.prices.ASK.current 
    }, true);
    logger.log('Order Action', { action: 'inserito', orderCode: initialOrder.OrderCode }, false);
    logFullBook();
}

function initializeOrderAndLog() {
    var initialOrder = initializeOrder();
    logInitialization(initialOrder);
}

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

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

function manageCycle() {
    var userCtx = UserContext;
    var status = userCtx.status;
    if (checkOperations()) return;

    status.secondCount += 1;
    if (status.secondCount < CONFIG.SECONDS) return;

    var book = mapBookData(Book(ps));
    userCtx.book = book;
    priceUpdate(CONFIG.ORDER_SIDE, book, status, userCtx);
    status.secondCount = 0;
}

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

    if (targetPrice === oldPrice) return;
    
    var newOrder = OrderUtils.processOrModOrder(side, ps, targetPrice);
    if (!newOrder) return;
    
    prices.current = targetPrice;
    var direction = Helper.priceDirection(targetPrice, oldPrice);
    var levelDifference = CONFIG.LEVELS[side] + direction;
    logger.log('LevelChange', { lastLevel: levelDifference, priceLevel: targetPriceLevel }, true);
    status.secondCount = 0;
    status.numOperazione++;
}

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

function onPriceEvent(ctx) {
    var price = Val(ps, "LAST");
    if (ctx.lastPrice === price) return;
    logger.log('PriceChange', {
        previousPrice: ctx.lastPrice,
        currentPrice: price,
        currentTime: Now().ToString("HH:mm:ss.ff")
    });
    ctx.lastPrice = 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 marketEvent(Book, mapBookData, handleEvent, UserContext, SystemContext) {
    return function() {
        if (!UserContext.status.run) return;
        var originalBook = Book(ps);
        var mappedBook = mapBookData(originalBook);
        UserContext.book = mappedBook;
        handleEvent(UserContext, SystemContext.EventType);
    };
}

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

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

marketEventInstance();