Dynatrace

DECEMBER 10, 2020

I recently joined two industry veterans and Dynatrace partners, Syed Husain of Orasi and Paul Bruce of Neotys as panelists to discuss how performance engineering and test strategies have evolved as it pertains to customer experience. Dynatrace news. This blog summarizes our great conversation for the posed questions.

Strategy 245

Strategy Performance Logistics Monitoring 245

Dynatrace

APRIL 21, 2022

Using high-fidelity metrics, logs, code-level tracing, and a dynamic topology map of your applications, Davis can identify the precise root cause and prioritize its business impact. With the automated analysis of your code hotspots within Dynatrace, you can quickly identify bottlenecks and help you right-size your cloud resources.

Azure 246

Azure Monitoring Virtualization Metrics 246

DZone

SEPTEMBER 11, 2019

Improving Testing and Fuzz Development with Coverage Analysis. In my previous post, we covered using bncov to do open-ended coverage analysis tasks to inform our testing. If we want to improve our confidence, we can add steps to exercise more of the code.

Programming 113

Programming Testing Code Performance 113

Smashing Magazine

SEPTEMBER 2, 2021

Over the last little while, I’ve been able to collect links to several interactive coding tools and apps that can help you supplement your skills in different areas of web development. This is a straightforward flexbox playground that also generates the code for you. “code golf”). TypeScript Exercises.

Development 145

Development Games Education Programming 145

The Agile Manager

FEBRUARY 28, 2025

Product testing practices havent changed much in thirty years; software testing practices havent changed much in twenty. The benefit of having specifications, whether for the threading of fasteners or scalability of a method, is that they enable components to be individually tested to see whether they meet expectations.

Software 40

Software Software Code Testing 40

Dynatrace

SEPTEMBER 20, 2019

The new version of the application is deployed in the green environment and tested for functionality and performance. Once the testing results are successful, application traffic is routed from blue to green. Let’s assume your team has just pushed new code and it passed pre-deployment testing. Dynatrace Davis in action.

Systems 38

Systems Traffic DevOps Database 38

Dynatrace

JUNE 1, 2023

More than half of CIOs confirmed that they often make tradeoffs among code quality, security, and reliability to meet the need for rapid software delivery. Fitness app : The fitness app should offer a response time of less than 500 milliseconds for exercise tracking and data recording.

Traffic 173

Traffic Website Latency Virtualization 173

Testlodge

AUGUST 9, 2023

Basis path testing in software testing is a white box method where the tester examines the codebase to identify all possible paths that could be taken by the user to achieve their aims. These paths are then written as test cases to ensure all the different identified scenarios in the main branches are covered.

Testing 75

Testing Software Software C++ 75

The Agile Manager

MARCH 31, 2025

Tech services firms are instead applying AI to their own offerings to do things like accelerate the reverse-engineering of existing code and expedite forward engineering of new solutions. That statement doesnt apply just to code. Those firms are developing proprietary products to do this (e.g.,

Technology 40

Technology Technology Design Engineering 40

Dynatrace

APRIL 5, 2024

In other words, where the application code resides. However, it’s essential to exercise caution: Limit the quantity of SLOs while ensuring they are well-defined and aligned with business and functional objectives. Data Explorer “test your Metric Expression” for info result coming from the above metric.

Efficiency 264

Efficiency Traffic Tuning Metrics 264

The Netflix TechBlog

DECEMBER 3, 2019

A key observation was that most of our data scientists had nothing against writing Python code. Data scientists want to retain their freedom to use arbitrary, idiomatic Python code to express their business logic?—?like The steps can be arbitrary Python code. like they would do in a Jupyter notebook.

Open Source 135

Open Source AWS Infrastructure Energy 135

The Netflix TechBlog

FEBRUARY 10, 2021

We wanted a way to ensure that we can have a consistent user experience while also sharing as much code as possible. Depending on which solution you choose, you could be inheriting a ton of issues or something that is battle tested. Do your research and don’t be afraid to ask around! For Hawkins, we decided to take both approaches.

Design 236

Design Systems Engineering Entertainment 236

Sutter's Mill

MARCH 30, 2025

Were addressing UB methodically, starting with addressing the common high-value cases that will do the most to harden our code: uninitialized variables, out-of-bounds access, pointer misuse, and the key UB cases that adversaries need to implement remote code execution. Spoiler: All constexpr / consteval compile-time code is UB-free.

C++ 70

C++ Programming Code Google 70

The Netflix TechBlog

MARCH 6, 2019

Rerun a batch of replays We collect replays from actual MezzFS mounts in production, and we rerun large batches of replays for regression and performance tests. We parallelize rerun jobs with Titus , Netflix’s container management platform, which allows us to exercise many hundreds of replay files in minutes.

Media 218

Media Storage Processing Cache 218

Smashing Magazine

OCTOBER 13, 2021

You can always ask a question live , you can share your screen and get immediate feedback, and you can work on group exercises with people around the world. Live discussions and interactive exercises are at the very heart of every workshop, with group work, homework, reviews and live interaction with people around the world.

Design 105

Design Programming Testing Systems 105

Sutter's Mill

JULY 29, 2024

Safety and simplicity are the two core things I want to try to dramatically improve in C++, and are why I’m doing my cppfront experiment, so although the above absorbed some time away from cppfront coding it all contributes to the same goal. (If Support all C++23 and draft C++26 headers that have feature test flags.

C++ 116

C++ Lambda Code Open Source 116

O'Reilly

OCTOBER 19, 2021

If you peek under the hood of an ML-powered application, these days you will often find a repository of Python code. Let’s start by considering the job of a non-ML software engineer: writing traditional software deals with well-defined, narrowly-scoped inputs, which the engineer can exhaustively and cleanly model in the code.

DevOps 145

DevOps Software Engineering Open Source Infrastructure 145

O'Reilly

JANUARY 17, 2023

Figuring out what kinds of problems are amenable to automation through code. So it behooves a software developer to spot what portions of human activity can be properly automated away through code, and then build that. Because if companies use code to automate business rules, they use ML/AI to automate decisions.

Tuning 145

Tuning Open Source Software Software 145

Particular Software

SEPTEMBER 11, 2023

Now go rewrite all your code… we’ll wait…are you done yet? the mobile app) can be built using modern, cloud-based technology while still leveraging the tried-and-true code in the various legacy systems. Imagine if any issues arose during testing or ( shudder ) in production, and you had to pinpoint where the problem lay.

Cloud 126

Cloud Systems Azure Airlines 126

SQL Performance

APRIL 14, 2021

I’ll do my testing in tempdb, enabling I/O and time statistics: SET NOCOUNT ON ; USE tempdb ; SET STATISTICS TIME , IO ON ; Limitations of earlier ideas. Use the following code to test the function with the variable assignment technique: DECLARE @n AS BIGINT ; SELECT @n = n FROM dbo. Well, he did , and it’s fascinating!

Servers 112

Servers C++ Testing Code 112

O'Reilly

JUNE 13, 2023

It also generated a short program that implemented the widely used Miller-Rabin primality test. After fixing some obvious errors, I ran the program–and while it told me (correctly) that my number was non-prime, when compared to a known good implementation of Miller-Rabin, ChatGPT’s code made many mistakes.

Google 122

Google Programming Database Testing 122

The Morning Paper

MARCH 15, 2020

See also: ‘ Simple testing can prevent most production failures ‘ and ‘[What bugs cause cloud production incidents?][]’ 48% of partial failures result in some part of the system being unable to make progress (‘stuck’). All in, OmegaGen is about 8Kloc of Java code, making use of the Soot analysis framework.

Systems 98

Systems Software Software Programming 98

The Netflix TechBlog

MAY 27, 2020

From failure injection testing to regularly exercising our region evacuation abilities, Netflix engineers invest a lot in ensuring the services that comprise Netflix are robust and reliable. Reliability, formally speaking, is the ability of a system to function under stated conditions for a period of time.

Engineering 105

Engineering Innovation Systems Architecture 105

Sutter's Mill

JANUARY 11, 2021

Assertions have been a foundational tool for writing understandable computer code since we could write computer code… far older than C’s assert() macro, they go back to at least John von Neumann and Herman Goldstine (1947) and Alan Turing (1949). 1,2] How well do we understand them… exactly? GUIDELINE: Assert liberally. [3]

C++ 81

C++ Programming Code Testing 81

Percona

AUGUST 30, 2023

If a PostgreSQL user wants to change these values, they need to recompile the PostgreSQL from the source code. This can be changed later using the pg_checksums utility, but that will be a painful exercise on a big database. Here is an example of the function definition to test the function-level settings.

Database 120

Database Servers Open Source Tuning 120

SQL Performance

JANUARY 12, 2022

Despite the poor performance, working on the solution is an interesting exercise. Use the following code to create the table and populate it with a small set of sample data: DROP TABLE IF EXISTS dbo. ( ID INT NOT NULL IDENTITY ( 1 , 1 ) CONSTRAINT pk_Auctions PRIMARY KEY CLUSTERED , Code CHAR ( 1 ) NOT NULL.

Code 116

Code Servers Performance Azure 116

O'Reilly

JUNE 27, 2023

When a person clicked “submit,” the website would pass that form data through some backend code to process it—thereby sending an e-mail, creating an order, or storing a record in a database. That code was too trusting, though. Red-team exercises can uncover weaknesses in the system while it’s still under development.

Social Media 128

Social Media Media Website Database 128

Sutter's Mill

JANUARY 25, 2021

We want a way to enable checking for some assertions but not others in the same code, because we may not always be able to afford expensive checks. That’s true whether we’re enabling checking at test time (e.g., Some conditions are so expensive that we may never check them without a good reason, even in testing. in production).

C++ 63

C++ Programming Cache Testing 63

Smashing Magazine

JULY 22, 2021

In my records for the entire day, I put one color code for my work hours and will have a separate diagram specifically to break up my work hours. Exercise/outdoors. In the image above, I have outlined three sample days which may or may not be from my own days. Large preview ). Completing actual work. Creating presentations. With Teams.

Games 141

Games Availability Software Software 141

Speed Curve

DECEMBER 13, 2023

Background For this performance audit, I looked at this synthetic test for the LEGO.com home page. (We You can drill down into the test details for each site and learn how the fastest sites stay fast.) Looking at the synthetic test results, we see that while Start Render time is an impressive 0.3 Use code splitting judiciously.

Performance 78

Performance Retail Benchmarking Ecommerce 78

The Agile Manager

OCTOBER 31, 2020

It had licensed a workflow technology and contracted a large number of people to code and configure a custom solution around it. This was no small task given the mismatch between a fine granularity of rules on the one hand and a coarse granularity of test cases on the other. In just about every circumstance, it was false results.

Programming 59

Programming Testing Code Technology 59

Sutter's Mill

MAY 1, 2023

Examples like the following now work… see test file pure2-break-continue.cpp2 for more examples. For example, see the test case pure2-types-order-independence-and-nesting.cpp2. outer: while i<M next i++ { // loop named "outer" //. inner: while j<N next j++ { // loop named "inner" //.

C++ 97

C++ Virtualization Lambda Code 97

Particular Software

MARCH 28, 2022

You can create a class that is a lousy saga but is still perfectly valid C# code. With Roslyn analyzers and code fixes , we can now do a lot better and help guide you toward the pit of success. This will save you time, as you won’t have to run your code to find out that you can’t use DateTime as a correlation property type.

Development 52

Development C++ Virtualization Metrics 52

Sutter's Mill

JUNE 3, 2021

Briefly, what is the difference among: (a) undefined behavior Undefined behavior is what happens when your program tries to do something whose meaning is not defined at all in the C++ standard language or library (illegal code and/or data). You’ll get some valid result, but you won’t know what the result is until your code looks at it.

C++ 73

C++ Programming Lambda Code 73

Sutter's Mill

FEBRUARY 17, 2020

Otherwise, you’ll either get the implicitly generated move functions, or else requests to move will automatically just do a copy instead, since copy is always a valid implementation of move (it just doesn’t exercise the non- const option). Yes, in my view it does make it a buggy class that shouldn’t pass code review.

C++ 98

C++ Testing Design Strategy 98

The Morning Paper

SEPTEMBER 24, 2019

There are four main parts to the story here: The testing environment that runs apps in a ‘honeypot’ and figures out which of those apps are leaking data they don’t have permission to obtain. The test mobile phones run an instrumented version of Android Marshmallow, on top of a custom Linux kernel which records all file I/O.

Systems 74

Systems Traffic Network Google 74

Testsigma

MARCH 6, 2020

Regression testing comprises re-running the test cases of already stable features and finding out if the new code changes attributed to the new release led to any negative impacts on the existing functionalities. When is Regression Testing done? Read here to know how to implement different types of regression testing.

Best Practices 52

Best Practices Testing Code Testing Tools 52