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Category: Performance

Whether you are a system designer, developer or tester, to build a high-performance system, you need to understand the following concepts: 1. Response time is the time for the system to respond to user requests, and response time is the user’s most intuitive experience of system performance. Therefore, the performance of the system is directly expressed. 2. Concurrent users, within a certain time frame, the largest number of simultaneous online users, that is, the number of peak online users 3. System throughput refers to the number of requests processed by the system within a unit time 4. Think Time, From a business perspective, this time refers to the time interval between each request when the user performs an operation. In order to simulate this time interval during performance testing, the concept of thinking time is introduced to more realistically simulate the user’s operate. In the formula of throughput, F=VU * R / T shows that throughput F is a function of the number of VUs, the number of requests issued by each user R, and time T, and R can be calculated by time T and user thinking time TS Calculation: R = T / TS

Disable welding in Wildfly reduces JSF performance

In wildfly 8.x or even jboss 7.x, disabling soldering will cause the JSF performance to be very low.

I discussed before this question Solved my performance problem and managed to solve it by

October 2, 2021By Simo Performance disabling, land, performance, reduced JSF, Strange, welding, WildflyLeave a Comment

Is there a performance principle in the byte order of hybrid binaries?

I am writing a parser for the most common type of geographic data storage. This is a set of files called “shapefiles”. This is my first project and I have to consider Endianness.

It turns out

October 2, 2021By Simo Performance Binary, bytes, Document, existent, mixing, order, performance, principle, whetherLeave a Comment

Performance test – instance explains VU, RPS, RT formula conversion

Overview I saw an article explaining VU, RPS, RT today, and there is a formula in the middle as shown below

Concurrent number = RPS * Response time

So I did several experiments locally

October 2, 2021By Simo Performance conversion, explanation, Formula, instance, performance, RPS, RT, test, VULeave a Comment

Performance test using the registrator

I am trying to use Protractor to get decent numbers from the terminal timing. I have tried using a protractor – but the time since then seems to really reflect the actual page load time. It says th

October 2, 2021By Simo Performance angleon, performance, test, useLeave a Comment

Performance Test – Vegeta Load Test: Different subjects of each post request in the attack

Is there a way to change the load test of the json body in the vegetable in the later request load test in the vegetable.

I want to send in the json body for each request A request with diffe

October 2, 2021By Simo Performance attack, Different, each, load, Main, Medium, performance, POST, Request, test, VegetaLeave a Comment

Performance – Use Selenium UI test speed (using XVFB) on Jenkins on Firefox

I am using the Firefox driver to run Selenium UI tests on Jenkins, and their execution speed is very slow compared to local execution. Specifically, it is almost the time required for local executi

October 2, 2021By Simo Performance Firefox, Jenkins, performance, Selenium, speed, test, Too Slow, UI, Used, XVFBLeave a Comment

Performance – The query is very slow when loading on PostgreSQL

We are using PostgreSQL version 9.4 database on Amazon EC2. All of our queries ran very slow on the first attempt, until after it was cached they were very fast, but it was not Mediation because it

October 2, 2021By Simo Performance First, loading, performance, PostgreSQL, query, running, speed, time, very slowLeave a Comment

Store two ancestors of the world and their descendants! ! !

1. The two ancestors of the storage world: RAM & ROM {Note: The level of performance is based on the premise of other specifications In the case of the same, comparatively speaking! }

RAM: Vo

October 2, 2021By Simo Performance ancestors, descendants, storage, they, two, worldLeave a Comment

Performance Test Tool Gnu Gprof

1 Introduction
Improving the performance of an application is a very time-consuming and labor-intensive work, but it is usually not very obvious which functions in the program consume most of the

October 2, 2021By Simo Performance GNU, GPROF, performance, test, toolLeave a Comment

Performance – Accelerate compilation time using USB key?

Since the compilation is mainly to read small files, I would like to know whether buying a fast USB key can speed up the compilation time, compared with standard SATA drives, and the price is lower

October 2, 2021By Simo Performance compile, key, performance, speed, time, USB, useLeave a Comment

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