Dynatrace

AUGUST 14, 2023

A/B testing allows organizations to compare two versions of a web or app experience and then determine which one performs better. Types of behavior analytics tools Organizations can use various tools to better understand certain aspects of user behavior. The following are some of the most frequently used behavior analytics tools.

Analytics 246

Analytics Social Media Website IoT 246

SQL Performance

AUGUST 1, 2022

One of the complexities that is of a specific importance to this section is comparisons that potentially involve NULL comparands, such as ones that you use in filter and join predicates. Most operators that you use in such comparisons, including the equals (=) and different than (<>) operators, use three-valued logic.

Servers 142

Servers Testing C++ Code 142

The Netflix TechBlog

MARCH 13, 2020

SVT-AV1 is written in C and can be compiled on major platforms, such as Windows, Linux, and macOS. In addition to the pure C function implementations, which allows for more flexible experimentation, the codec features extensive assembly and intrinsic optimizations for the x86 platform.

Open Source 159

Open Source Efficiency C++ Speed 159

The Netflix TechBlog

APRIL 17, 2019

However, rav1e is written in Rust programming language, whereas an encoder written in C has a much broader base of potential developers. The open-source encoder should also enable easy experimentation and a platform for testing new coding tools. Added a unit tests framework based on Google Test.

Open Source 167

Open Source Scalability Speed Efficiency 167

Speed Curve

APRIL 27, 2022

But as you can see in these filmstrips of Wiggle, a UK cycling retailer, hiding the page can have a dramatic impact on a visitor's experience: Comparison of a site loading with (top) and without (bottom) the anti-flicker snippet enabled. The test in top row has the anti-flicker snippet in place. before the hero image. important }.

Performance 145

Performance C++ Google Retail 145

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

The Netflix TechBlog

JANUARY 24, 2022

Why do we run Performance Tests on commits? By running performance tests against every commit (pre- and post-merge), we can detect potentially regressive commits earlier. What are the Performance Tests? There are roughly 50 performance tests, each one designed to reproduce an aspect of member engagement.

Performance 208

Performance Performance Testing Metrics Testing 208

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 Programming 98

Sutter's Mill

MAY 1, 2023

This update covers Acknowledgments, and highlights of what’s new in the compiler and language since last time, including: simple, mathematically safe, and efficient chained comparisons named break and continue “simple and safe” starts with. In today’s C++, this kind of comparison silently compiles but is a bug.

C++ 97

C++ Virtualization Lambda Code 97

The Netflix TechBlog

DECEMBER 7, 2020

For historical reasons, the libvmaf C library has been a minimal solution to integrate VMAF with FFmpeg. The examples above demonstrate an original frame (a) and its enhanced versions by sharpening (b), and histogram equalization (c), and their corresponding VMAF scores. This year, we invested heavily on revamping the API.

Metrics 159

Metrics Open Source Tuning Speed 159

SQL Performance

APRIL 13, 2022

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. numgroups AS INT = 1000 , @rowspergroup AS INT = 10000 , -- test with 1000 to 10000 here. My test machine has four logical CPUs, running SQL Server ® 2019 Enterprise.

C++ 136

C++ Strategy Testing Servers 136

HammerDB

JULY 6, 2024

This is a brief post to highlight the metrics to use to do the comparison using a separate hardware platform for illustration purposes. sysbench-tpcc offers the ability to build multiple schemas to work around scalability issues, however the TPC-C specification uses a single set of tables which can be built as follows. idle%-99.97

C++ 52

C++ Hardware Benchmarking Virtualization 52

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

JANUARY 31, 2024

In the age of AI, data observability has become foundational and complementary to AI observability, data quality being essential for training and testing AI models. Data observability is crucial to analytics and automation, as business decisions and actions depend on data quality.

DevOps 272

DevOps Analytics Airlines Metrics 272

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

Testsigma

MAY 21, 2021

Protractor is an end-to-end test framework made for angular and angularJS applications. It uses angular-specific locator strategies to make it easier to automate the end-to-end test cases on these applications. Nonetheless, Protractor is not able to leverage such technology without forcing users to rewrite their tests.

Open Source 52

Open Source Mobile Google Infrastructure 52

SQL Performance

MARCH 9, 2022

I tested all solutions in this article against the Auctions input table with 100K, 200K, 300K, and 400K rows, and with the following indexes: -- Index to support solution. Here are the contents of C: DemandID SupplyID TradeQuantity. -- 1 1000 5.000000. Performance Comparison. Figure 6: Performance comparison.

C++ 138

C++ Code Efficiency Performance 138

Sutter's Mill

SEPTEMBER 25, 2022

[Edited to add pre-publication link to next draft of P2392, revision 2, and correct iterator comparison] Brief background As I presented at CppCon 2021 starting at 11:15 , I’m proposing is (a general type or value query) and as (a general cast, for only the safe casts) for C++ evolution. null test (currently at line 298 ).

C++ 98

C++ Testing Code Systems 98

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

Enprowess

SEPTEMBER 7, 2021

Quick summary : Node vs React Comparison is not correct because both technologies are entirely different things. Node JS vs. React JS Comparison. Unit testing: Node.js has a unit testing framework called Jasmine, which allows unit testing of code during development. Node JS vs. React JS Comparison.

Open Source 52

Open Source Virtualization Programming Servers 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). 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

Smashing Magazine

NOVEMBER 26, 2021

It can also have tests that are flaky and don’t inspire any confidence. You can think of writing unit test cases for your components or utility functions. You can take a look at their comparison and features to decide which one you should use. Write Maintainable Tests From The Start. Writing tests consumes time.

Cache 145

Cache Code Testing Design 145

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

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++ 105

C++ Virtualization Programming Latency 105

SQL Performance

AUGUST 2, 2019

is out , I thought it might be time to do a bit of testing myself. OrderID , c. Customers c ON o. CustomerID = c. OrderID , c. OrderID , c. Customers c ON o. CustomerID = c. OrderID , c. OrderID , c. Customers c ON o. CustomerID c. OrderID , c. OrderID = ol.

Servers 95

Servers C++ Testing Systems 95

Scalegrid

AUGUST 15, 2019

Query Code for converting queries to five target language: Java, Python, C#, PHP, and JavaScript (Node.js). NoSQLBooster also has a test data generator , which is not something you usually expect when trying to buy a GUI tool, but nonetheless a handy tool. A Task Scheduler to automate repetitive MongoDB jobs. MongoDB Compass.

Database 40

Database Servers Availability Monitoring 40

Highly Scalable

MAY 1, 2012

This process is shown in the figure below: It is clear that if sketch is large in comparison with the cardinality of the data set, almost each value will get an independent counter and estimation will precise. A user ID from each incoming event is tested against the per-tag filters – does it satisfy the required combination of tags or not.

Analytics 191

Analytics Traffic Big Data Efficiency 191

SQL Performance

MARCH 11, 2020

In the previous articles ( Part 1 , Part 2 , and Part 3 ), I covered the meaning of the NULL as a marker for a missing value, how NULLs behave in comparisons and in other query elements, and standard NULL handling features that are not yet available in T-SQL. T3 ( col1 , flag ) ; Let's test this solution.

C++ 135

C++ Code Servers Database 135

Testsigma

JANUARY 18, 2021

Does this mean that enough effort was not spent in the automation testing process? The possibility is that the web developer and test automation engineer did not do thorough cross browser testing! However, choosing a scalable, secure, and reliable cross browser testing infrastructure should not be overlooked in the process.

Testing 55

Testing Operating System Website Internet 55

HammerDB

JUNE 27, 2022

Also, when testing a database with a De-Witt clause, it was then possible to produce your own results without having to rely on a particular vendor to publish results of interest. When testing database performance there are 2 distinct workloads, transactional or OLTP and analytic (data warehouse, decision support) or OLAP.

Benchmarking 63

Benchmarking Open Source C++ Cache 63

Smashing Magazine

AUGUST 9, 2021

This explains the challenges involved in deploying and testing HTTP/3 yourself. HTTP/2 versus HTTP/3 protocol stack comparison ( Large preview ). For example, if we have files A, B, and C, we would have three TCP connections. You might think that’s not a big problem, as we see there is no loss for resources A and C.

Transportation 145

Transportation Internet Internet Network 145

Brendan Gregg

SEPTEMBER 25, 2021

As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. There's also a test and println() in the loop to, hopefully, convince the compiler not to optimize-out an otherwise empty loop. This will slow this test a little.) I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c.

Speed 103

Speed Java AWS Virtualization 103

SQL Performance

MAY 8, 2019

GetNums ( 1 , 100 ) AS C WHERE C. GetNums ( 1 , 100 ) AS C WHERE C. But for customers 17 and 59, the IN predicate yields UNKNOWN since all comparisons with non-NULL values yield FALSE, and the comparison with the NULL yields UNKNOWN. custid , C. custid = C. CREATE TABLE dbo.

Best Practices 68

Best Practices C++ Code Servers 68

SQL Performance

SEPTEMBER 5, 2019

CREATE CLUSTERED COLUMNSTORE INDEX c ON #T WITH ( MAXDOP = 1 ) ; Run the following test queries against the new columnstore table: SELECT. c = COUNT_BIG ( * ) FROM #T AS T WHERE 1 = ( SELECT 1 ) -- Avoid trivial plan. Aggregate pushdown still works for the COUNT_BIG aggregate only in the second test.

Performance 81

Performance C++ Storage Servers 81

Testsigma

JULY 31, 2021

The Shift Left testing approach is not a new term. This testing approach expedites testing and helps detect bugs in the early stages of development. But, First, What’s Shift Left Testing? Shift Left is a testing approach where testing begins right from the software development phase.

Testing 52

Testing Testing Tools Analytics Java 52

O'Reilly

SEPTEMBER 19, 2023

Hadoop’s value—being able to crunch large datasets—often paled in comparison to its costs. You can see a simulation as a temporary, synthetic environment in which to test an idea. Millions of tests, across as many parameters as will fit on the hardware. Other groups have tested evolutionary algorithms in drug discovery.

Hardware 135

Hardware Storage Big Data Blockchain 135

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. 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.

C++ 63

C++ Programming Cache Testing 63