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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

Performance – Combination (N Select K) Parallelization and Efficiency

Recently I have been using word combinations to make “phrases” in different languages, and I have noticed some things I can do with more professional input.

Define some constants for this,

October 2, 2021By Simo Performance chemical, combination, efficiency, parallel, performance, selectionLeave a Comment

Performance – In the React Single Page Appset, what method can be measured to measure the full display of the page?

Or, if it is difficult to make precise measurements, is there a measurement that is proportional to the front-end improvement? We want to initiate an event when this happens (for real user monitori

October 2, 2021By Simo Performance application, complete, Measure, method, mode, option, page, performance, program, React, Show, single, time, VisionLeave a Comment

Performance – Open multiple SQLite database instances on different threads (QT)

Is there any problem with using multiple open connections from different threads at the same time?

From what I have seen it is thread-safe by default, but, could this hurt performance rather

October 2, 2021By Simo Performance at the same time, DB, different thread, instance, multiple SQLITE, open, performance, QTLeave a Comment

Analysis of performance test strategies and applicable scenes

In the face of increasingly complex business scenarios and different system architectures, preliminary requirements analysis and preparation work , It takes a lot of time. And different test strate

October 2, 2021By Simo PerformanceLeave a Comment

Optimization – Collect service performance indicators with time

I want to collect the performance metrics of each ServiceStack service, and write a service that reports these metrics. Specifically, I ultimately want to present a report similar to this:

Se

October 2, 2021By Simo Performance at any time, collection, indicator, Optimize, performance, room, serviceLeave a Comment

AS3 large stage edge performance is poor

When using a large stage with a size of 3840 x 2160, I will see performance issues when setting the sprite animation to the edge of the stage.

I can Add hundreds of these to the stage without

August 22, 2021By Simo Performance AS3, edge, large, performance, poor, stageLeave a Comment

.NET 4.0 Dictionary: Value Class Type button for invalid ‘null’ check. Is this harmful?

For example:

.method private hidebysig instance void Insert(!TKey key, !TValue’value’, bool add ) cil managed
{
.maxstack 3
.locals init (
[0] int32 num,
[1] int32 num2,
[2] int32 num3,

August 22, 2021By Simo Performance 4.0, check, Dictionary, for, hurt, invalid, key, null, performance, type, valueLeave a Comment

.NET – How to construct the performance of the LINQ expression?

Is there a difference in performance based on the position of the where clause in the linq expression?

Look at the following code:

dbContext.AnEntity.Include(“AnotherEntity”).Where(e =>

August 22, 2021By Simo Performance expression, How to construct, linq, performance, why notLeave a Comment

4 common cache problems and solutions

Foreword Using cache can alleviate the pressure of large traffic, significantly Improve the performance of the program. When we use the cache system, especially in the case of large concurrency

August 22, 2021By Simo Performance caching, common, detailed, plan, problem, solution, speciesLeave a Comment

Azure Additional BLOB Slow Read Performance

I have observed that when the blob is appended thousands of times or more, the read speed from Azure Append Blob is very slow. The write/append speed is fast, but the read Thousands of typical log

August 22, 2021By Simo Performance additional, Azure, blob, performance, read, slowLeave a Comment

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