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

DZone

NOVEMBER 9, 2021

Saving several hours preparing and doing a design review will cost hundreds (if not thousands of hours) of fixing issues down the road.nn> unit testsnnI don’t believe that I have to say that in 2021, but I have never seen a quality product without unit tests. We live in a time when everybody is irked by manual testing.

Software 245

Software Software Code Energy 245

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

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

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

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 207

Analytics C++ Innovation Engineering 207

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

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

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

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++ 61

C++ Servers Testing Processing 61

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++ 58

C++ Programming Code Testing 58

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++ 54

C++ Programming Lambda Code 54

Tasktop

SEPTEMBER 3, 2020

The corresponding key results could be (a) 60% mobile usage OR (b) Improve the % of product NPS score OR (c) The number of new users increase by 30%. Clear definitions and boundaries around resources and skill sets needed. It’s definitely possible to set some or all of your key results as outputs. Easy to track and manage.

C++ 59

C++ Innovation Strategy Mobile 59

SQL Performance

JULY 27, 2021

As well as the nonclustered index correctness checks, if there’s a persisted computed column in the definition of a table, then for each data record in the table, DBCC CHECKDB has to check that the persisted value is correct, regardless of whether that column is part of a nonclustered index or not. columns [ c ] JOIN sys.

C++ 54

C++ Servers Database Code 54

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

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 229

Artificial Intelligence Monitoring Infrastructure Cloud 229

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 142

Programming C++ Database Code 142

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 143

Cache Code Testing Design 143

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++ 49

C++ Code Testing Systems 49

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 162

AWS Development Lambda Open Source 162

DZone

FEBRUARY 27, 2021

The legacy languages — be it ASM or C still rule in terms of performance. But these are definitely ruled out for enterprise applications due to the complexity in development, maintainability, need for object orientation, and interoperability. Input The input will contain several test cases (not more than 10).

Java 207

Java C++ Benchmarking Programming 207

Sutter's Mill

JANUARY 25, 2021

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. The first place to look for the bug is in this same function, because if prior contracts were well tested then likely this function created the first unexpected state.

C++ 45

C++ Programming Cache Testing 45

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

Nick Desaulniers

MAY 12, 2019

Prefer f(void) in C to potentially save a 1B instruction per function call when targeting x86_64 as a micro-optimization. Doesn’t matter for C++. While messing around with some C code in godbolt Compiler Explorer , I kept noticing a particular funny case. For example, the following C code: 1. Wstrict-prototypes can help.

C++ 111

C++ Code Testing 111

Percona

MARCH 7, 2019

There could be more, but this particular query was definitely hurting the performance of the server. c) From there you can divert into the areas that are related to that resource and start to narrow down the issue. Have realistic load tests. From that point, we were confident that we had identified the problem.

C++ 102

C++ Traffic Servers Monitoring 102

Randon ASCII

MARCH 30, 2020

My test builds took up to 6.2 I did my tests on an October 2019 version of Chromium’s code because that gave me the most flexibility about which build options to use. Wouldn’t it be nice if there was some way to test this? What of our jumbo build with up to five C++ files per compilation: python. count_costs.py

C++ 87

C++ Code Open Source Programming 87

SQL Performance

JUNE 10, 2020

Recall that a relation’s body—being a set of tuples—by definition has no duplicates. Customers AS C WHERE EXISTS ( SELECT * FROM Sales. custid = C. Customers AS C LEFT OUTER JOIN Sales. Orders AS O ON C. custid , C. orderid , ROW_NUMBER ( ) OVER ( PARTITION BY C. Orders AS O ON C.

C++ 109

C++ Database Servers Code 109

Sutter's Mill

MARCH 25, 2021

This is more obvious when the precondition involves multiple parameters (or ordinary variables for that matter); a poster child is the STL’s pervasive use of iterator pairs, which have long been crying out to be encapsulated using a range abstraction, and fortunately we now have that in C++20. Definitely. is_reachable?

C++ 45

C++ Design Code Systems 45

SQL Performance

JUNE 10, 2020

Recall that a relation’s body—being a set of tuples—by definition has no duplicates. Customers AS C WHERE EXISTS ( SELECT * FROM Sales. custid = C. Customers AS C LEFT OUTER JOIN Sales. Orders AS O ON C. custid , C. orderid , ROW_NUMBER ( ) OVER ( PARTITION BY C. Orders AS O ON C.

C++ 93

C++ Database Servers Code 93

The Morning Paper

NOVEMBER 7, 2019

The definition of root cause itself is taken from Wilson : “Root cause is that most basic reason for an undesirable condition or problem which, if eliminated or corrected, would have prevented it from existing or occurring.” Kairux sets breakpoints at all of these locations and runs the test that reproduces the failure.

Programming 47

Programming Java C++ Testing 47

The Morning Paper

OCTOBER 29, 2019

Today we’re taking a closer look at CORELS, the C ertifiably O ptimal R ul E L ist S algorithm that we encountered in Rudin’s arguments for interpretable models earlier this week. ” Instead of finding a good-enough rule list, we have to find the best rule list (for some definition of best, which we’ll get to in a moment).

C++ 45

C++ Design Testing Code 45

The Agile Manager

AUGUST 31, 2021

The obvious conclusions are (a) every individual drives to the collective output of the team; (b) every individual must strive to perform a high state of excellence; and (c) a team cannot maintain a level of performance any higher than the level of excellence achieved by its weakest performing member.

Metrics 52

Metrics Design Engineering C++ 52

The Agile Manager

DECEMBER 31, 2019

A good litmus test of growth: "Beware of fake growth like market-share growth: If you sell seat cushions for a 50,000-seat stadium, you can double sales every year but eventually you’ll run out of seats. By this definition, consulting firms are not tech firms: because they rent bodies, they have direct costs proportional to sales.

Entertainment 52

Entertainment Transportation Energy Innovation 52

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

KeyCDN

OCTOBER 17, 2019

High Dynamic Range is also known as HDR and wide color gamut is akin to what people now call “Ultra High Definition” photos and videos. While you can choose between liabom, rav1e, SVT-AV1 only the liabom seems to pass both the technical requirements and the “eye” test.

Media 43

Media Internet Internet Speed 43

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 112

Programming C++ Code Operating System 112

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