[雙語翻譯]計算機外文翻譯--開發(fā)人員視角下的java web服務性能評估

1、3500 英文單詞， 英文單詞，17500 英文字符，中文 英文字符，中文 5600 字文獻出處： 文獻出處：Ahuja S, Yang J L. Performance Evaluation of Java Web Services: A Developer’s Perspective[J]. Communications some are to show the transparency and abstraction. This

2、 section explains these metrics.3.1. LatencyIn terms of network, latency is an expression of how much time it takes for data to be sent back to a request. This includes the time for the request to be sent to the server,

3、the time the server spends on processing the task, and the time for the results to be sent back. The network latency is contributed by many factors, such as propagation, transmission, modem and router processing, and sto

4、rage delays. The propagation is the time it takes for an object, such as data, to transfer from a location to another in the speed of light. Transmission is the delay from the medium like optical fiber or wireless networ

5、ks. Modems and routers take time to check the headers of a packet. The storage delay is the time it takes for the actual hardware storage, such as hard drives, to store the received data. In this project, the latency is

6、tested with different scenarios such as requesting 1, 2, 3, 4, and 5 MB of data, and 1, 5,10, 15, 20 clients simultaneous requesting data. From the results of such testing, trends can be found and compared for each frame

7、work.3.2. ThroughputThroughput is the amount of clients or data processed within a certain unit of time, like a second. It is highly related to latency, since scenarios with high latency would result in low throughput, a

8、nd scenarios with low latency would result in high throughput. However, by viewing the latency graph, we can only tell the trends of response time, while we can determine the most efficient scenario for a framework throu

9、gh viewing a throughput graph.3.3. Memory UsageIn computing, memory is data storage to temporarily store data for calculations of the computer. There is a wide variety of memory, such as cache memory, flash memory, ran

10、dom access memory (RAM), virtual memory, etc. Either memory, they are all limited in server due to the cost and space. A framework that uses less memory would have an advantage of allowing higher capacity for the server.

11、3.4. CPU UsageCentral Processing Unit (CPU), also known as processor, is a component in a computer used to interpret program instructions and process data. Although it is only able to process one task at a time, when the

12、re are multiple tasks to be done, instead of finishing a task then going to an- other, the CPU is designed to switch to other tasks before finishing one if necessary, so that it would act like if it is executing multiple

13、 tasks at the same time. However, large tasks might occupy a lot of CPU time, which de- creases the time scheduled for other tasks. A framework that uses less CPU would allow the server to have more time to execute other

14、 tasks.3.5. Source Lines of CodeThe source lines of code (SLOC) used in a framework can indicate the transparency and abstraction of the framework. The main goal of a framework is to save the developer’s time and effort

15、by not having to write the entire code from scratch. Thus the less lines of code that is required for a framework, the more time and effort is saved by this framework. However, lines of code cannot be exactly accurate si

16、nce some lines might be long while some lines are short. So the number of files and size of files also is a consideration.4. Statistical Analysis MethodsAfter retrieving the test data to compare the performances, we need