Why is the reverse while loop faster than the forward loop in AS3? 10

Let's take a look at the range of i values in these two groups.

The first i belongs to [0, the second i belongs to [1, the operation runs one less time, haha

Well, the above is a joke.

However, the fact that the execution time of these two functions should be comparable, and the possible reason for the difference is the CPU load and memory usage of the computer at that time. Try running the second segment first, and then executing the first segment, and the results may be different

Is it interesting to be brainless like this, the difference is a matter of milliseconds, and it has no effect on your program at all.

You can use it as you get used to it, and you should be careful not to enter the dead loop to be true.

SWF is getting slower and slower, and those who listen, and the sound, the bitmap is not clean enough, alas.

var t:int

var i:int

i = 0;

t = gettimer();

while (i<99999999)

i++;trace(gettimer()-t);

i=99999999;

t = gettimer();

while (i>0)

i--trace(gettimer()-t);

It should be seen in the ** in the "". Test a few more times. The result should be the same.

These questions are considered by the masters. As a newbie, you don't have to think about it that much.

So many questions, the lecture is opened.

Rates: Priced over time periods.

Needless to say, there is merit and reactive power.

Phase: ABC three-phase.

Combination: According to the combination of characteristic words, is it positive + negative? Positive-negative ?..Wait for the attached page after the standard.

Four-quadrant: phase angle position.

I'm dizzy! Too much ...

Reverse electric energy: It is generally used in power plants and other occasions where there is electric energy output, and only reverse electric energy exists, and other situations are positive electric energy.

Demand: Power over a period of time. Generally, it is aimed at large users, such as factories, shopping malls and other large electricity consumers, or electricity consumption in a small community.

Rates: At present, 4 rates (peak and valley) are generally used in China to adopt different rates for electricity consumption at different times, with the purpose of reducing electricity consumption during peak hours and encouraging electricity consumption during low peak hours. Example:

Every night from 6 o'clock to 11 o'clock is the peak of electricity consumption, using the sharp rate, at this time 2 yuan per kilowatt-hour, but from 0 o'clock to 6 o'clock in the morning, at this time there are few electricity users, for the valley rate, per kilowatt-hour of electric yuan. That is, different ** is used at different times.

Positive active energy: the rate of electricity consumed by the user;

Reverse active energy: the rate of electric energy output by the user, which is generally used in power plants and other occasions where there is electric energy output;

Split-phase electric energy: for multi-phase instruments, generally three-phase instruments, there is ABC three-phase split-phase electric energy;

Forward voltage, which is not used in most cases, indicates the voltage drop across the diode when the maximum forward current flows through the diode. This parameter is generally valued at low pressures.

The forward current is the maximum current flowing through the diode when the diode is working normally, and the current direction is a k, that is, the current flowing from the triangle in the symbol to the straight line. This is the limit value, and exceeding it will damage the diode.

The reverse voltage is only the maximum voltage that the diode can withstand when the potential of the K terminal is higher than the A terminal, which is also the limit value, and the diode will have irreversible reverse breakdown when it is exceeded.

Diode: Forward Conduction, Reverse Cut-off, What Does It Mean? The old electrician taught you.

A diode is equivalent to a large resistance under normal conditions. The potential at both ends can be considered to be the same when analyzed.

Forward conduction means that when the current direction is positive, the diode is on, and reverse cut-off means that when the current direction is reversed, the diode is disconnected.

A diode, an electronic component, is a device with two electrodes that allows only a single direction of current to flow through it, and many are used to apply its rectification function. Varactor diodes (VAFIC diodes) are used as electronic tunable capacitors. The current directivity of most diodes is often referred to as "rectifying".

The most common function of a diode is to allow only current to pass through a single direction (known as forward bias) and to block it in reverse direction (known as reverse bias). Therefore, the diode can be thought of as an electronic version of the check valve.

The unidirectional conductivity of the diode is utilized.

Use a DNS server.

There are two areas in it, namely the "forward search area" and the "reverse search area" in the short and blind "forward search area" is what we usually call domain name resolution, and the reverse search area is the IP reverse resolution mentioned here, and its function is to query the IP address.

ptr record to get the IP address pointing to the domain name of Clear.

Forward search area"--From domain name resolution to IP address What is the forward search area? The so-called forward search area refers to the process of resolving a domain name into an IP address. In other words, when a user enters a server domain name, the domain name can be resolved to an IP address with the help of this record, so as to achieve access to the server.

Reverse search area"--Resolve from IP address to domain name In most DNS searches, the client typically performs a forward search. DNS also provides reverse search, allowing a client to search for a computer's DNS name based on its IP address. The domain name information for the reverse search is saved in the reverse search area.

Forward: It is to search down from the current location Reverse: It is to search up from the current location Establishing a reverse search area allows users to use the IP address to reverse query the DNS name of the computer.

The forward power is the useful work of the absorption system, and the reverse power is the useful work delivered to the system. The national grid is connected, the simplest is like a mouth-shaped power grid, not our general users see that the end of the electricity is transmitted to one end.

One can be measured in positive and negative power, and the other is protection. When there is a short circuit, it is decided which circuit breakers of the toroidal power grid are short-opened, and the fault section is separated.

(+) is a positive score, that is, one point is added for answering "yes", and no points are added for answering "no"; (- is a reverse score, i.e. the answer is "yes".)

No points are added, and one point is added for answering "no".

E-scale (21 items):

P-scale (23 items):

n-scale (24 items):

): None. l Scale (20 questions):

Typical questions are scored in the forward direction, with occasional reverse scores.

For example, a questionnaire has 10 questions. The final score result is explained by the higher the score, the more pronounced the symptoms. For example, question 5 is a reverse scoring question, and the score in this questionnaire is 5 points, that is, choose one of them.

So if you choose 4 points, then it should be converted to 2. In this way, all the reverse questions can be converted before the total score can be counted, so that the total score can be counted.

Got it?

Reverse registration is only available by invitation, and the traffic at the top of the ranking is relatively large. The positive is the independent choice of registration traffic and ranking is inferior to the reverse! The same is true for Double Twelve.