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

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. 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. The challenge. CREATE TABLE dbo.

C++ 136

C++ Strategy Testing Servers 136

Smashing Magazine

JANUARY 7, 2019

Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. 2019-01-07T12:00:13+00:00. 2019-04-29T18:34:58+00:00. Testing And Monitoring. You can then mimic the 90th percentile’s experience for testing. Vitaly Friedman. Quick Wins.

Performance 103

Performance Cache Metrics Network 103

The Morning Paper

SEPTEMBER 20, 2020

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. Adding a direct dependency to pin a version, even when it’s not truly a direct dependency of the project (another code smell!).

Monitoring 137

Monitoring Java C++ Strategy 137

Percona

MARCH 7, 2019

In other words, the time the CPU was executing user code, such as MySQL. 2019-02-22T18:26:25 Creating triggers. 2019-02-22T18:27:14 Created triggers OK. 2019-02-22T18:27:14 Copying approximately 4924071 rows. clients`: 94% 00:24 remain 2019-02-22T18:34:15 Copied rows OK. 2019-02-22T18:34:15 Analyzing new table.

C++ 101

C++ Traffic Servers Monitoring 101

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. Here’s the code to create the dummy table: DROP TABLE IF EXISTS dbo. BatchMe ON 1 = 0.

C++ 124

C++ Servers Testing Code 124

Smashing Magazine

JULY 16, 2019

2019-07-16T14:30:59+02:00. 2019-07-16T14:35:52+00:00. Note: Windows users will also need Microsoft Visual C++ 14.0, which you can grab from “Microsoft Visual C++ Build Tools” over here. First you’ll need to make sure you have a c-compiler on your system. The following code is to be entered into a python script.

Scalability 87

Scalability Website C++ Servers 87

SQL Performance

OCTOBER 14, 2020

Then, you will probably want to continue reading this section and test the code that I use as I revisit key unnesting examples that I previously demonstrated with derived tables and convert them to use CTEs. Here’s the attempted solution using a CTE: WITH C AS. ( ( SELECT *. FROM Sales. OrderDetails. FROM Sales.

C++ 52

C++ Servers Code Efficiency 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++ 61

C++ Servers Testing Processing 61

Dynatrace

JULY 13, 2020

refers to cloud-based, containerized, distributed systems, made up of cooperating microservices, dynamically managed by automated infrastructure as code. . ? At the start, Docker was mainly use d by developers for testing purpose s , but the main challenge was to manage containers at scale in real-world production environments. . ?

Google 132

Google Ecommerce DevOps Cloud 132

Dynatrace

JULY 13, 2020

refers to cloud-based, containerized, distributed systems, made up of cooperating microservices, dynamically managed by automated infrastructure as code. . ? At the start, Docker was mainly use d by developers for testing purpose s , but the main challenge was to manage containers at scale in real-world production environments. . ?

Google 130

Google Ecommerce DevOps Cloud 130

Brendan Gregg

SEPTEMBER 25, 2021

The broken Java stacks turned out to be beneficial: They helped group together the os::javaTimeMillis() calls which otherwise might have have been scattered on top of different Java code paths, appearing as thin stacks everywhere. Without NMI, some kernel code paths (interrupts disabled) can't be profiled. But I'm not completely sure.

Speed 126

Speed Java AWS Virtualization 126

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. Given the increasing importance of open source and the widespread use of HammerDB, the TPC adopted HammerDB in 2019 and now hosts the project on GitHub.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

SQL Performance

MAY 11, 2022

You can download the source code to create and populate this database here. I ran all the examples on SQL Server ® 2019 Developer, where batch-mode on rowstore is available. The following query, which I’ll refer to as Query 5, illustrates this technique: WITH C AS. ( Environment for Demos. I’ll remind you at the end.

C++ 133

C++ Database Servers Code 133

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. The graph below shows the relationship between the number of lines of code in source files and how long it took to compile them. More on that later.

C++ 87

C++ Code Open Source Programming 87

Sutter's Mill

FEBRUARY 8, 2021

Otherwise, it’s “just an assertion”: As with an assertion, if a postcondition is false then it means there is a bug, likely right there inside the function on which the postcondition is written (or in the postcondition itself), because if prior contracts were well tested then likely this function created the first unexpected state. [2]

C++ 45

C++ Lambda Efficiency Code 45

Enprowess

SEPTEMBER 7, 2021

Unit testing: Node.js has a unit testing framework called Jasmine, which allows unit testing of code during development. It makes code very easy to understand and launch. Stable code: With downward data flow, React.js assurances code stability and better application performance. Easy UI test cases.

Open Source 52

Open Source Virtualization Programming Servers 52

SQL Server According to Bob

MAY 19, 2019

As you can imagine, with a code base as large and vast as SQL Server, there is always room for improvement. There are a bunch of folks with compiler, linker, SQL Server code, testing and other disciplines who provided input. SQL Server 2019 builds DLLs and EXEs with 4KB file alignment to enable better demand paging.

IoT 61

IoT Servers Development Cache 61

HammerDB

JULY 17, 2019

From the previous post we now have source and binary copies of HammerDB for modification and test. The next step is to see if there is an Issue already created for the database we want to add or whether we should create one. > <mariadb> <connection> <maria_host>127.0.0.1</maria_host>

Database 40

Database C++ Testing Metrics 40

Smashing Magazine

AUGUST 9, 2019

2019-08-09T12:30:59+02:00. 2019-08-09T12:36:17+00:00. So typically you have to write custom code to exclude any 3rd party scripts when a headless browser is detected, which depending on your setup, may be tricky. As is the case with all 3rd party dependencies, this means relying on somebody else's code. Luke Harrison.

Performance 94

Performance C++ Media Website 94

Scalegrid

AUGUST 15, 2019

Read on to find out which is the best MongoDB GUI for you, updated for 2019, that contain these key features: A good visual editor to write and edit queries faster. It’s further enhanced by an in-place code editor which is also available in all three views. We’ll be focusing on data visualization, presentation, and editing.

Database 40

Database Servers Monitoring Availability 40

Brendan Gregg

SEPTEMBER 25, 2021

The broken Java stacks turned out to be beneficial: They helped group together the os::javaTimeMillis() calls which otherwise might have have been scattered on top of different Java code paths, appearing as thin stacks everywhere. Without NMI, some kernel code paths (interrupts disabled) can't be profiled. Ubuntu is 5x slower.

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

AUGUST 29, 2021

100.00 ^C I'm looking at the r_await column in particular: the average wait time for reads in milliseconds. Hit Ctrl-C to end. ^C Hit Ctrl-C to end. ^C The developers can also rework the code with the memory constraint in mind to improve performance (e.g., avg-cpu: %user %nice %system %iowait %steal %idle 14.81

Cache 40

Cache C++ AWS Systems 40

Brendan Gregg

SEPTEMBER 25, 2021

The broken Java stacks turned out to be beneficial: They helped group together the os::javaTimeMillis() calls which otherwise might have have been scattered on top of different Java code paths, appearing as thin stacks everywhere. Without NMI, some kernel code paths (interrupts disabled) can't be profiled. But I'm not completely sure.

Speed 40

Speed Java AWS Virtualization 40

HammerDB

OCTOBER 12, 2018

This post complements the previous best practice guides this time with the focus on MySQL and MariaDB and achieving top levels of performance with the HammerDB MySQL TPC-C test. InnoDB is the storage engine that will deliver the best OLTP throughput and should be chosen for this test. . order by c.

Best Practices 40

Best Practices Scalability Performance C++ 40

KeyCDN

OCTOBER 17, 2019

AV1 is the royalty-free video coding format that has most tech experts believing it is the next step in media compression. was released and approved in February of 2019 and is therefore ready to be used in production. Once you choose liabom as your encoder, you should use the typical liabom encoder library known as C API.

Media 43

Media Internet Internet Speed 43

Smashing Magazine

JANUARY 11, 2021

Have we optimized enough with tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, progressive hydration, clients hints, HTTP/3, service workers and — oh my — edge workers? You can then mimic the 90th percentile’s experience for testing. Quick Wins.

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

APRIL 9, 2019

2019-04-09T12:30:59+02:00. 2019-04-29T18:34:58+00:00. This attribute contains seemingly endless alphanumeric junk that you may be tempted to strip out in the quest for cleaner code. If they can compromise that one file, they can very quickly have code running in millions of web pages across the globe. Drew McLellan.

Website 57

Website Servers Code Best Practices 57

Smashing Magazine

JANUARY 6, 2020

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? Testing And Monitoring. You can then mimic the 90th percentile’s experience for testing. Table Of Contents.

Performance 145

Performance Cache Network Metrics 145

SQL Server According to Bob

DECEMBER 18, 2018

Testing shows that by using the Fua bit with the data, write request can reduce the I/O traffic by ~50% for a SQL Server, write-intensive workload. During my investigation, I traced, tested, reviewed, and instrumented the Linux kernel to understand the SQL Server I/O durability needs and associated impacts. Starting with the Linux 4.18

Servers 90

Servers Media Cache Storage 90

The Symphonia

DECEMBER 7, 2018

We spent most of our time chatting to various folk about what they are doing with AWS now, and where they hope to proceed in 2019. Ruby, C++, and Rust are now Lambda languages directly supported by AWS. These artifacts are shared across functions, and so allow for code and data sharing.

Lambda 40

Lambda Serverless AWS Blockchain 40

Smashing Magazine

OCTOBER 26, 2018

2019-04-29T18:34:58+00:00. When it comes down to how WordPress is programmed, one thing is certain: it doesn’t follow the M odel- V iew- C ontroller (MVC) design pattern that many developers are familiar with. Before we delve deeper in the code, a couple more things about WordPress REST API. Let’s create a small test plugin.

Cache 78

Cache Website Speed Database 78

Tasktop

OCTOBER 16, 2019

He casually mentioned that he found a really confusing test failure the other day that we should pair up on. Ready to start digging into some code again, he gave me the broad picture: Internally we use Log4j2 as our logging solution of choice (with the various off-the-shelf adapters to handle 3rd libraries with different log frameworks).

C++ 9

C++ Servers Testing Infrastructure 9

O'Reilly

MARCH 2, 2020

Fetishizing unit testing. It’s not about getting software developers to write code faster. Development timelines for these projects aren’t as predictable as traditional software; they stretch the meaning of “testing” in strange ways; they aren’t deterministic. What is modern Agile? Fetishizing standups.

Artificial Intelligence 21

Artificial Intelligence Software Architecture Programming Infrastructure 21