You don't have to worry about the class precedence list for methods and slots inherited from only one superclass or another. The advantage of using auxiliary methods is that it makes it quite clear which methods are primarily responsible for implementing the generic function and which ones are only contributing additional bits of functionality. Of course, if you're going to rely on a coding convention--that every method calls CALL-NEXT-METHOD--to ensure all the applicable methods run at some point, you should think about using auxiliary methods instead. Thus, if you want to be able to reuse the code that prints the savings-account part of the statement, you'll need to break that code into a separate function, which you can then call directly from both the money-market-account and super sport casino savings-account print-statement methods. The more proxy components are located between client and server, the more is the latency’s part in the response time. So Common Lisp uses a second rule that sorts unrelated superclasses according to the order they're listed in the DEFCLASS's direct superclass list--classes earlier in the list are considered more specific than classes later in the list. The problem is that while you can use CALL-NEXT-METHOD to call "up" to the next most specific method, namely, the one specialized on checking-account, there's no way to invoke a particular less-specific method, such as the one specialized on savings-account.

When that method calls CALL-NEXT-METHOD, it will result in running the savings-account method since it will be the next most specific method according to money-market-account's class precedence list. This option is used to specify forms that will be evaluated to provide arguments for specific initialization parameters that aren't given a value in a particular call to MAKE-INSTANCE. Inherited :reader, :writer, and :accessor options aren't included in the merged slot specifier since the methods created by the superclass's DEFCLASS will already apply to the new class. Both of these methods will be applicable to instances of money-market-account, but the one specialized on checking-account will be considered more specific than the one on savings-account because checking-account precedes savings-account in money-market-account's class precedence list. In general, if you find yourself twiddling the order of the direct superclass list as a way of fine-tuning the behavior of specific methods, you probably need to step back and rethink your approach. That is, if classes could have only a single direct superclass, ordering classes by specificity would be trivial--a class and all its superclasses could be ordered in a straight line starting from the class itself, followed by its single direct superclass, followed by its direct superclass, all the way up to T. But when a class has multiple direct superclasses, those superclasses are typically not related to each other--indeed, if one was a subclass of another, you wouldn't need to subclass both directly.

You don't need to worry about :default-initargs for now. 3As when naming functions and variables, it's not quite true that you can use any symbol as a class name--you can't use names defined by the language standard. 11The Meta Object Protocol (MOP), which isn't part of the language standard but is supported by most Common Lisp implementations, provides a function, class-prototype, that returns an instance of a class that can be used to access class slots. Thus the time includes all the processing needed to assemble the request as well as assembling the first part of the response, which in general will be longer than one byte. Gatling defines response time as a time from the moment it tries to resolve DNS and establish connection to a target host till the last byte of the response is received or any error happens. Response time and latency are distinct concepts that play crucial roles in describing performance of the web applications. This article is a gentle introduction to web application performance measurements. They were searching for specifications, PDF manuals, BIOS updates or drivers for audio, VGA, LAN and chipset especially for Windows XP, Windows 7 and Windows 10. So it was obvious to write an article about the non existing Foxconn N15235 motherboard / video card and how to identify the hardware's real model number or name.

There’s an article in this blog about relation between number of components in a distributed system and heavy tails of the response time distribution. Finding the right hotel shuttle for your trip doesn’t have to be difficult if you know what type of service is available and how to book it ahead of time. In other words, response time measurement includes network latency. The new class can, however, create its own accessor functions by supplying its own :reader, :writer, or :accessor options. Other options include shared ride shuttles, which are usually more affordable than private shuttles but can take longer due to multiple stops. Multiple inheritance is easiest to understand when the different superclasses provide completely independent slots and behaviors. This class defines no slots of its own but will inherit slots from both of its direct superclasses, including the slots they inherit from their superclasses. Specifying any parameters as -1 will leave value unchanged. This gives you the most control over the new behavior but will probably require more new code than some other options I'll discuss in a moment. 8Of course, providing an accessor function doesn't really limit anything since other code can still use SLOT-VALUE to get at slots directly.