Percona

APRIL 10, 2023

Then, each key-value entry will keep in the key the column name surrounded by backticks, and the value will be the masking function definition. mydumper -o data -B test --defaults-file=mydumper.cnf -r 100000 -c real 0m19.964s user 0m48.396s sys 0m7.885s It took near 19.9 sbtest1`] `k`=random_int The backup took 20.7

Testing 113

Testing C++ Open Source Database 113

The Netflix TechBlog

MARCH 2, 2021

We use A/B tests to introduce new product features, such as our daily Top 10 row that help our members discover their next favorite show. David Cameron (Studio Production) [David C.] My academic credentials definitely helped on the technical side. Learning through data is in Netflix’s DNA.

Analytics 219

Analytics C++ Innovation Engineering 219

Alex Podelko

OCTOBER 28, 2016

I am looking forward to share my thoughts on ‘Reinventing Performance Testing’ at the imPACt performance and capacity conference by CMG held on November 7-10, 2016 in La Jolla, CA. Quite often the whole area of load testing is reduced to pre-production testing using protocol-level recording/playback. – Cloud.

Performance Testing 100

Performance Testing Technology Technology Testing 100

SQL Performance

MARCH 10, 2021

I’ll do my testing in tempdb, enabling time statistics: SET NOCOUNT ON ; USE tempdb ; SET STATISTICS TIME ON ; Earlier ideas. BatchMe ( col1 INT NOT NULL , INDEX idx_cs CLUSTERED COLUMNSTORE ) ; And here’s the code with the definition of the dbo.GetNumsAlanCharlieItzikBatch function: CREATE OR ALTER FUNCTION dbo.

C++ 134

C++ Testing Code Servers 134

SQL Performance

JANUARY 13, 2021

L0 AS ( SELECT 1 AS c. ORDER BY rownum ; I used the following code to test the function with "Discard results after execution" enabled in SSMS: SELECT n FROM dbo. Here’s the function’s definition: CREATE OR ALTER FUNCTION dbo. L0 AS ( SELECT 1 AS c. BatchMe ON 1 = 0.

C++ 113

C++ Code Testing Processing 113

SQL Performance

FEBRUARY 10, 2021

I’ll do my testing in tempdb, enabling IO and TIME statistics: SET NOCOUNT ON ; USE tempdb ; SET STATISTICS IO , TIME ON ; The fastest solution from last month applies a join with a dummy table that has a columnstore index to get batch processing. Fastest solution so far. BatchMe ON 1 = 0. ORDER BY rownum ; GO.

C++ 124

C++ Servers Testing Code 124

SQL Performance

DECEMBER 9, 2020

In a comment to my article, Marcos Kirchner mentioned that he tested my solution with varying table value constructor cardinalities, and got different execution times for the different cardinalities. Testing different base table cardinalities is just one dimension to try. Let’s proceed to performance testing.

C++ 114

C++ Servers Testing Processing 114

Dynatrace

NOVEMBER 8, 2021

G2 Research includes a clear definition of APM in its Grid Report for Application Performance Monitoring for Spring 2021. To deliver flawless user experiences, an APM solution should be able to delve into real-user monitoring and synthetic testing, with the ability to replay session-level details. User experience diagnostics.

Artificial Intelligence 240

Artificial Intelligence Monitoring Infrastructure Cloud 240

CSS Wizardry

JULY 21, 2018

le|c|sa|sc)ss$/{print}' | nl. Set Up Regression Tests. For longer-term refactoring or auditing, it can be useful to set up a formal regression testing tool such as BackstopJS. Ideally, we’d have a regression testing suite in-place permanently, so this is as good a time as any to start.

Programming 144

Programming C++ Code Database 144

All Things Distributed

DECEMBER 1, 2016

I was joined by 32,000 James Bonds at the conference today from all around the world, and we introduced new services focused on accelerating this transformation across development, testing and operations, data and analytics, and computation itself. Transformation in Development, Testing, & Operations.

AWS 139

AWS Development Lambda Open Source 139

Percona

NOVEMBER 1, 2023

version, like this: ANALYZE TABLE removes the table from the table definition cache, which requires a flush lock. version, like this: ANALYZE TABLE removes the table from the table definition cache, which requires a flush lock. In short, ANALYZE could lead to nasty stalls in busy production environments. addressing this problem.

Servers 103

Servers Database Cache C++ 103

SQL Performance

APRIL 13, 2022

Note the definition of the primary key constraint based on the composite key (grp, ord), which results in a clustered index based on the same key. To test the performance of your solution, you’ll need to populate the table with larger volumes of sample data. L0 AS ( SELECT 1 AS c. uniquevalues AS INT = 5 ; ALTER TABLE dbo.

C++ 136

C++ Strategy Testing Servers 136

O'Reilly

JANUARY 9, 2024

Python is an interpreted language, so there’s no machine code, but there’s no reason this loop couldn’t incorporate a C or C++ compiler. With C or Python, you can read a program and understand exactly what it does. We still rely on humans to test and fix the errors. Google’s Bard has similar capabilities.

Programming 115

Programming C++ Code Operating System 115

Sutter's Mill

MAY 1, 2023

Simple, mathematically safe, and efficient chained comparisons ( commit ) P0515 “Consistent comparison” (aka “spaceship”) was the first feature derived from this Cpp2 work to be adopted into the ISO Standard for C++, in C++20. Thank you again to everyone who helped land this Cpp2 feature in the ISO C++ Standard.

C++ 97

C++ Virtualization Lambda Code 97

Testsigma

FEBRUARY 3, 2021

Also, how to test the hardware of the mobile phone itself, is it supporting all the software as it should? To answer all these questions we need exhaustive mobile testing in place. Let us have a look at the most popular types of mobile testing for applications and hardware. Functional Testing. Usability Testing.

Mobile 82

Mobile Testing Hardware C++ 82

Sutter's Mill

SEPTEMBER 28, 2023

file compilation looks like when compiled on the command line on my laptop: But note you can still build cppfront as all-today’s-C++ using any fairly recent C++20 compiler because I distribute the sources also as C++ (just as Bjarne distributed the cfront sources also as C). Here’s what that reflect.h2

C++ 100

C++ Cache Code Design 100

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. Here’s the function’s definition: -- Helper dummy table. BatchMe ( col1 INT NOT NULL , INDEX idx_cs CLUSTERED COLUMNSTORE ) ; GO. -- Function definition. BatchMe ; GO.

C++ 112

C++ Servers Testing Code 112

Testsigma

AUGUST 28, 2021

We all know that if we are developing something that runs on the web using browsers then cross-browser testing needs to be done. There is another variation of cross-browser testing – cross-device testing. In this article, we will discuss the scenarios when automating your cross-browser testing would be a good idea.

Testing 75

Testing Cloud C++ Operating System 75

Testsigma

APRIL 8, 2020

The answer is BDD , a framework that allows the business requirements to be converted into test cases that are reviewable by business and users when needed. BDD is a software development process that is driven by the behaviour of an application and is sometimes called as an extension of the Test Driven Development (TDD) approach.

Development 96

Development Programming Testing Java 96

O'Reilly

APRIL 25, 2023

Many of the prompts are about testing: ChatGPT is instructed to generate tests for each function that it generates. At least in theory, test driven development (TDD) is widely practiced among professional programmers. Tests tend to be very simple, and rarely get to the “hard stuff”: corner cases, error conditions, and the like.

Programming 132

Programming Architecture Code Strategy 132

Smashing Magazine

NOVEMBER 23, 2021

John C Barstow. It follows best practices, tries to present a strong visual identity, has good contrast levels, and uses Overpass for headings and body, which provides a unified and legible sans serif family of typefaces: See the Pen [Dyslexia-unfriendly design]([link] by John C Barstow. Adding A Dyslexia-Friendly Mode To A Website.

Website 134

Website C++ Best Practices Design 134

SQL Performance

MARCH 11, 2020

The standard unique constraint definition is a bit different than the T-SQL version. Here's the unique constraint definition from the standard: "A unique constraint on T is satisfied if and only if there do not exist two rows R1 and R2 of T such that R1 and R2 have the same non-NULL values in the unique columns.".

C++ 135

C++ Code Servers Database 135

Percona

JULY 5, 2023

Although there are tools and methods to prepare and test the upgrade before going live, often, not all problems can be anticipated. For example, while it is possible to test read workload, it is pretty difficult to test things write-related. Default database: 'test'. Any changes in system tables made since the 8.0

C++ 123

C++ Database Servers Testing 123

SQL Performance

AUGUST 2, 2019

is out , I thought it might be time to do a bit of testing myself. I restored a copy of WideWorldImporters and then created three stored procedures (definitions below). OrderID , c. Customers c ON o. CustomerID = c. OrderID , c. OrderID , c. Customers c ON o. CustomerID = c. OrderID , c.

Servers 95

Servers C++ Testing Systems 95

SQL Performance

JULY 13, 2022

To test the performance of the solutions, you’ll need a larger set of sample data. L0 AS ( SELECT 1 AS c. GetNums ( 1 , @numrows ) AS N ; Feel free, of course, to test the performance of the solutions with different data loading parameters if you’d like.

C++ 112

C++ Code Azure Database 112

Sutter's Mill

SEPTEMBER 3, 2024

We can hopefully do it even more simply and elegantly in C++26/29. Pre-C++11 answer I recently received this question in email from my friend Christopher Nelson. Perhaps you can relate, if you’ve ever said, “I’m pretty sure the answer is X, but this part of C++ is so complex that I’m not sure of myself.”

C++ 76

C++ Code Programming AWS 76

Smashing Magazine

NOVEMBER 26, 2021

It can also have tests that are flaky and don’t inspire any confidence. checks for type definition during build time. You can think of writing unit test cases for your components or utility functions. You can also use Chromatic along with Storybook for visual testing and catching regression issues during each release.

Cache 144

Cache Code Testing Design 144

Sutter's Mill

JANUARY 11, 2021

C++20 supports two main assertion facilities… For each one, briefly summarize how it works, when it is evaluated, and whether it is possible for the programmer to specify a message to be displayed if the assertion fails. 5] For conditions, it’s up to us to make sure it’s true.) see question 4) if NDEBUG is not set. Bonus: [[assert: ?

C++ 80

C++ Programming Code Testing 80

Randon ASCII

OCTOBER 4, 2020

At this point if Process C came along and called timeBeginPeriod(4) this wouldn’t change anything – Process A would continue to wake up 500 times a second. The other program ( measure_interval.cpp ) runs some tests to see how much its behavior is altered by the behavior of change_interval.cpp. That’s crazy! It’s time to do science.

Programming 145

Programming Games Hardware Operating System 145

O'Reilly

DECEMBER 10, 2024

That seemed like something worth testing outor at least playing around withso when I heard that it very quickly became available in Ollama and wasnt too large to run on a moderately well-equipped laptop, I downloaded QwQ and tried it out. How do you test a reasoning model? But thats hardly a valid test.

C++ 76

C++ Design Google Games 76

Smashing Magazine

JULY 18, 2022

If you think that static rendering is limited to generic, public content that is the same for every user of your website, you should definitely read this article. There are many use cases: personalization, internationalization, theming, multi-tenancy, A/B tests…. There was something he wanted to C.";

Cache 118

Cache Website Servers Energy 118

Testsigma

DECEMBER 27, 2019

We do ‘ Cross Browser Testing ’ to meet the end user expectations across different web browsers. If your application is compatible enough, it will definitely help in obtaining a good business. In this article, we will see how we do cross browser testing in 2 ways: manual browser testing and automated browser testing.

Testing 54

Testing Testing Tools Operating System Mobile 54

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). its results if call sites call it in a way that violates the precondition the assertion is testing.

C++ 73

C++ Programming Lambda Code 73

Percona

OCTOBER 17, 2023

The dynamic allocation might have flaws, but it’s definitely a good addition. As a final note, either upgrading or downgrading, It is always recommended to test the procedure in a lower/QA environment that mirrors the production environment, allowing you to get used to the process and clearing any doubts you may have.

Metrics 108

Metrics C++ Database Storage 108

Scalegrid

FEBRUARY 15, 2024

This approach is particularly useful in testing or development environments. MongoDB® SSL with Self-Signed Certificates in C# Configuring MongoDB Server for SSL/TLS Encryption Once your certificates are ready, the next step is configuring the MongoDB server for SSL/TLS encryption, allowing you to securely connect to MongoDB.

Servers 130

Servers Best Practices Government Network 130

SQL Performance

MAY 11, 2022

Naturally, if a partitioning or ordering element doesn’t appear in the window function, you omit that part from the index definition. The following query, which I’ll refer to as Query 5, illustrates this technique: WITH C AS. ( Consider the following query, which I’ll refer to as Query 6: WITH C AS. ( max3: orderid.

C++ 133

C++ Database Servers Code 133

Sutter's Mill

FEBRUARY 25, 2021

Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for preconditions. [1] The above would be roughly equivalent to writing the test before the call at every call site instead. This has the big benefit that it works using today’s C++.

C++ 68

C++ Code Testing Systems 68