SQL Performance

FEBRUARY 12, 2020

In Part 1 I covered the meaning of the NULL marker and how it behaves in comparisons. In Part 1 in the series I explained how NULLs behave in comparisons and the complexities around the three-valued predicate logic that SQL and T-SQL employ. Often in practice you want NULLs to behave just like non-NULL values for comparison purposes.

C++ 120

C++ Code Servers Database 120

Sutter's Mill

FEBRUARY 17, 2020

C++ “move” semantics are simple, and unchanged since C++11. Move: What it is, and how to use it In C++, copying or moving from an object a to an object b sets b to a ’s original value. This post is an attempt to shed light on that situation. That’s it for what advanced users need to know. Yes, but don’t.

C++ 98

C++ Testing Design Strategy 98

SQL Performance

DECEMBER 9, 2020

Use the following code to run a test with base CTE cardinality of 2 (requires 5 additional levels of CTEs): DECLARE @low AS BIGINT = 1 , @high AS BIGINT = 100000000 ; WITH. Make sure that you enable Discard results after execution in your SSMS Query Options dialog under Grid, Results.

C++ 114

C++ Servers Testing Processing 114

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). By definition, if a function’s preconditions are violated, then the results are not specified.

C++ 54

C++ Programming Lambda Code 54

SQL Performance

APRIL 13, 2022

Use the following code to create a table called T1 and populate it with a small set of sample data: SET NOCOUNT ON ; USE tempdb ; DROP TABLE IF EXISTS dbo. Use the following code to create the helper function GetNums: CREATE FUNCTION dbo. L0 AS ( SELECT 1 AS c. I recommend you try to find a solution before implementing mine.

C++ 136

C++ Strategy Testing Servers 136

SQL Performance

DECEMBER 11, 2019

Like them or not, as a database practitioner you often have to deal with them, and given that NULLs do add complexity to your SQL code writing, it's a good idea to make it a priority to understand them well. I start with coverage of what NULLs are and how they behave in comparisons. Comparisons involving NULLs.

Best Practices 117

Best Practices C++ Database Code 117

The Netflix TechBlog

APRIL 17, 2019

Reference software serves as the basis for standard development, a framework, in which the performance of video coding tools is evaluated. However, rav1e is written in Rust programming language, whereas an encoder written in C has a much broader base of potential developers. Furthermore, unit tests will cover new code.

Open Source 166

Open Source Scalability Speed Efficiency 166

Percona

JUNE 4, 2023

In this blog, we’ll provide a comparison between MariaDB vs. MySQL (including Percona Server for MySQL ). MariaDB vs. MySQL vs Percona Server for MySQL: General Comparisons MariaDB, MySQL, and Percona Server for MySQL are all very popular choices for relational database management systems. In-development for MySQL 8.0 (now

Open Source 52

Open Source Servers Storage Scalability 52

The Morning Paper

MAY 16, 2019

bugs you do let slip into your code. The six applications studied were Docker, Kubernetes, etcd, CockroachDB, gRPC, and BoltDB, so that’s a lot of important real-world Go-code right there. An especially interesting comparison can be made in the case of gRPC, which has both a C implementation and a Go implementation.

Programming 100

Programming C++ Design Code 100

HammerDB

OCTOBER 23, 2023

HammerDB has always used stored procedures as a design decision because the original benchmark was implemented as close as possible to the example workload in the TPC-C specification that uses stored procedures. Additionally, reviewing official TPC-C full disclosure reports highlighted that all vendors also use stored procedures.

Benchmarking 62

Benchmarking Database Network C++ 62

The Morning Paper

SEPTEMBER 20, 2020

In comparison, this ratio is only 0.03% for Java projects managed by Maven following the same investigation method. For example, think of the classic diamond pattern where A depends on B and C, and B and C both in turn depend on D, but there is no version of D that satisfies the constraints of both B and C.

Monitoring 137

Monitoring Java C++ Strategy 137

Tech News Gather

SEPTEMBER 7, 2022

The technology is open-source therefore any developer can go to the react-native.dev platform and get the code from the vast pool of developers’ community for a simpler and better user experience. There, when Objective C, Swift, Java, and Kotlin are mixed with their corresponding devices, they are deemed native languages.

Development 52

Development Mobile Java C++ 52

SQL Performance

JULY 1, 2021

Here is a query to help you track them down using the sys.columns catalog view, but you're on your own for any explicit references that might exist in your application code: SELECT [ Schema ] = s. name , [ Column ] = c. name , [ Data Type ] = TYPE_NAME ( c. system_type_id <> c.

C++ 58

C++ Database Servers Performance 58

SQL Performance

DECEMBER 9, 2020

Use the following code to run a test with base CTE cardinality of 2 (requires 5 additional levels of CTEs): DECLARE @low AS BIGINT = 1 , @high AS BIGINT = 100000000 ; WITH. Make sure that you enable Discard results after execution in your SSMS Query Options dialog under Grid, Results.

C++ 61

C++ Servers Testing Processing 61

Nick Desaulniers

SEPTEMBER 5, 2017

Active contributors over 60 days cuts out folks who do commit to either code bases, just not as often. Also, the comparison is not quite fair since the overlap in front-end-language and back-end-target support in these two massive projects does not overlap in a lot of places. Lies, damn lies, and statistics, right?

Development 75

Development C++ Open Source Engineering 75

Smashing Magazine

NOVEMBER 26, 2021

However, there are a few ways in which you can make a large code-base easy to maintain. In certain cases, the build will fail if there are type mismatches in your code as Next.js We recommend using code editor type checking during development.”. Use Code Generators Like Hygen To Generate Boilerplate Code.

Cache 143

Cache Code Testing Design 143

Highly Scalable

JUNE 5, 2012

In this article I describe several useful techniques that are based on SSE instructions and provide results of performance testing for Lucene, Java, and C implementations. Performance of this procedure both in C and Java will be evaluated in the last section.

C++ 102

C++ Java Performance Testing Efficiency 102

DZone

FEBRUARY 27, 2021

The legacy languages — be it ASM or C still rule in terms of performance. There were languages I briefly read about, including other performance comparisons on the internet. Considering all aspects and needs of current enterprise development, it is C++ and Java which outscore the other in terms of speed. Ahem, Slow!

Java 207

Java C++ Benchmarking Programming 207

Sutter's Mill

AUGUST 13, 2023

Thanks again to C++ Now for inviting me to speak this year in glorious Aspen, Colorado, USA! The talk I gave there was just posted on YouTube, you can find it here: At CppCon 2022, I argued for why we should try to make C++ 10x simpler and safer , and I presented my own incomplete experimental compiler, cppfront.

C++ 89

C++ Efficiency Design Virtualization 89

Brendan Gregg

OCTOBER 8, 2018

C @ns: [256, 512) 10900 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1k) 18291 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [1k, 2k) 4998 |@@@@@@@@@@@@@@ | [2k, 4k) 57 | | [4k, 8k) 117 | | [8k, 16k) 48 | | [16k, 32k) 109 | | [32k, 64k) 3 | |. Here's a comparison for an average-sized DTraceToolkit script (seeksize.d)

C++ 110

C++ Virtualization Programming Latency 110

Sutter's Mill

JANUARY 25, 2021

Not only is the integer comparison operation cheap, but min and max are already being accessed by this function and so they’re already “hot” in registers or cache. 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. in production).

C++ 45

C++ Programming Cache Testing 45

The Morning Paper

JUNE 20, 2019

Most Azure code is written in.Net managed languages such as C#, reducing memory leak bugs. 7% of all software bug incidents are caused by mistakes in constants: hard-code configuration, special purpose strings such as URLs, and enum-typed values. Tools like CHESS and PCT [[link] are used to expose shared-memory concurrency bugs.

Cloud 81

Cloud Azure Cache C++ 81

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. Consider using a class instead. is_reachable?

C++ 45

C++ Design Code Systems 45

SQL Performance

AUGUST 2, 2019

There are a few additional coding recommendations that Pam Lahoud discusses in her very informative post, TEMPDB – Files and Trace Flags and Updates, Oh My! OrderID , c. Customers c ON o. CustomerID = c. OrderID , c. OrderID , c. Customers c ON o. CustomerID = c. OrderID , c. CustomerID.

Servers 95

Servers C++ Testing Systems 95

SQL Performance

JANUARY 8, 2020

I also explained how comparisons involving NULLs work with constants, variables, parameters and columns. Another option is to explicitly replace NULL inputs with an empty string using the ISNULL or COALESCE functions, but this usually results in lengthy verbose code. 3 C NULL 4 D 150.00 Contacts ; GO. CREATE TABLE dbo.

Design 65

Design C++ Code Database 65

Nick Desaulniers

MAY 25, 2015

The other programs that might be compiled are C, C++, and to some extent Java and C#. Taking the time to do translation to native machine code ahead of time can result in better performance at runtime, but an interpreter can get to work right away without spending any time translating. const char * const prologue =. "

C++ 73

C++ Programming Code Architecture 73

Testsigma

JULY 31, 2021

You can write your test scripts in simple English as it’s a codeless testing tool; your test scripts are translated into code by its NLP capabilities. This low-code testing tool comes with a Screener that seamlessly integrates visual testing into functional testing workflows. Source: Testsigma. Signup now. Source: Ranorex.

Testing 52

Testing Testing Tools Analytics Java 52

CSS Wizardry

OCTOBER 16, 2023

Concatenate Concatenation is probably the trickiest bit to get right because, even though the three C s happen in order, decisions we make later will influence decisions we make back here. In our specific examples above, the one-big-file pattern incurred 201ms of latency, whereas the many-files approach accumulated 4,362ms by comparison.

Cache 291

Cache Latency Strategy Speed 291

Testsigma

APRIL 16, 2021

Appium gives us the freedom to write scripts in any language of our choice, like Java, Ruby, C#, Javascript, PHP, Python. Simple set-up process and offers synchronization capabilities which means we don’t have to write any extra code for waiting until activity/fragment are loaded or completed. Test cases are executed fast.

Testing 52

Testing Open Source Mobile Java 52

Testsigma

JANUARY 18, 2021

The usage of Selenium requires understanding about the framework and programming languages like C#, Python, Java, PHP, etc. On the other hand, codeless automation tools like Testsigma enable team members to come up with stable test automation scripts without writing any code. You can read more about Testsigma here.

Testing 55

Testing Operating System Website Internet 55

ACM Sigarch

OCTOBER 4, 2018

Order preserving encryption is only useful when simple comparisons such as less than/greater than need to be applied to data and reveals the outcome of these comparisons to an attacker, but is reasonably efficient. For Further Study: Applied Cryptography: Protocols, Algorithms, and Source Code in C by Schneier.

Systems 47

Systems Hardware Storage Healthcare 47

Testsigma

JUNE 26, 2021

Gone are the days when automation testers had to learn coding to write test scripts. As the name suggests, codeless automation testing is a testing methodology that doesn’t require writing the code. Testers don’t have to learn to code as codeless automation testing tools can translate their inputs into scripts.

Testing Tools 52

Testing Tools Testing Analytics Mobile 52

The Netflix TechBlog

FEBRUARY 13, 2020

By Aditya Mavlankar, Jan De C**k¹, Cyril Concolato, Kyle Swanson, Anush Moorthy and Anne Aaron TL; DR We need an alternative to JPEG that a) is widely supported, b) has better compression efficiency and c) has a wider feature set. Brief overview of image coding formats The JPEG format was introduced in 1992 and is widely popular.

Code 212

Code Metrics Efficiency Open Source 212

SQL Performance

MARCH 9, 2022

Auctions ( Code , ID ) INCLUDE ( Quantity ) ; -- Enable batch-mode Window Aggregate. Auctions ( ID ) WHERE ID = - 1 AND ID = - 2 ; When describing the logic behind the solutions, I’ll assume the Auctions table is populated with the following small set of sample data: ID Code Quantity -- -. Code = 'D'. )

C++ 138

C++ Code Efficiency Performance 138

Daniel Lemire

FEBRUARY 8, 2019

I believe that all optimizing C/C++ compilers know how to pull this trick and it is generally beneficial irrespective of the processor’s architecture. In concrete terms, here is the C code to compute the remainder of the division by some fixed divisor d : uint32_t d =. ; // your divisor > 0. count5 + = 1 ; }.

C++ 279

C++ Benchmarking Hardware Testing 279

Brendan Gregg

OCTOBER 7, 2018

C @ns: [256, 512) 10900 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1k) 18291 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [1k, 2k) 4998 |@@@@@@@@@@@@@@ | [2k, 4k) 57 | | [4k, 8k) 117 | | [8k, 16k) 48 | | [16k, 32k) 109 | | [32k, 64k) 3 | |. Here's a comparison for an average-sized DTraceToolkit script (seeksize.d)

C++ 40

C++ Virtualization Programming Latency 40

SQL Performance

NOVEMBER 11, 2020

WITH C AS ( SELECT SYSDATETIME ( ) AS dt ) SELECT @i += 1 FROM C WHERE dt = dt ; PRINT @i ; GO. -- Batch 3. WITH C AS ( SELECT SYSDATETIME ( ) AS dt ) SELECT @i += 1 WHERE ( SELECT dt FROM C ) = ( SELECT dt FROM C ) ; PRINT @i ; GO. dt and the other with C2.dt.

C++ 122

C++ Code Storage Processing 122