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 338

Cache Latency Strategy Speed 338

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++ 83

C++ Efficiency Design Virtualization 83

Highly Scalable

SEPTEMBER 18, 2012

In comparison with pure anti-entropy, this greatly improves consistency with a relatively small performance penalty. C) In the previous schema, failures can be handled better using the hinted handoff technique [8]. Consider an example: there are 3 nodes A, B, and C and increment operation was applied 3 times, once per node.

Database 213

Database Latency C++ Scalability 213

Sutter's Mill

NOVEMBER 24, 2024

On Saturday, the ISO C++ committee completed the third-last design meeting of C++26, held in Wrocaw, Poland. There are just two meetings left before the C++26 feature freeze in June 2025, and C++26 is on track to be completed two more meetings after that in early 2026. is the nutshell synopsis. Thank you, Hana!

C++ 61

C++ Code Education Design 61

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

Dynatrace

AUGUST 14, 2023

With a single source of truth, organizations can align cross-functional teams from areas such as IT, product, marketing, customer support, and the C-suite toward a shared vision of delivering the best customer experience possible. An advanced analytics solution should include the following capabilities.

Analytics 238

Analytics Social Media Website IoT 238

Brendan Gregg

NOVEMBER 4, 2020

Mbytes to the kernel image (this is tiny in comparison to DWARF debuginfo, which can be hundreds of Mbytes). The BCC tools should eventually be switched from Python to libbpf C under the hood, but will work the same. However, **Appendix C's Python programming examples are now considered deprecated.** It adds about 1.5

C++ 143

C++ Programming Storage Code 143

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. ) SELECT C1. orderid , C1.

C++ 122

C++ Code Storage Processing 122

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. async-hide { opacity: 0 !important important }.

Performance 145

Performance C++ Google Retail 145

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

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

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

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

SQL Performance

DECEMBER 11, 2019

I start with coverage of what NULLs are and how they behave in comparisons. Comparisons involving NULLs. I'll first cover comparisons involving constants. Later I'll cover comparisons involving variables, parameters and columns. This way you can avoid unnecessary bugs and pitfalls.

Best Practices 117

Best Practices C++ Database Code 117

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 160

Metrics Open Source Tuning Speed 160

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 160

Open Source Efficiency C++ Speed 160

SQL Performance

MARCH 9, 2022

) , C AS ( -- fill in NULLs with next supply / demand. -- FIRST_VALUE(ID) IGNORE NULLS OVER. -- would be better, but this will work because the IDs are in CumulativeQuantity order. 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

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. In the figure below, you can see a comparison of two versions of the SVT-AV1 codec, the blue plot representing SVT-AV1 version from March 15, 2019, and the green one from March 19, 2019.

Open Source 167

Open Source Scalability Speed Efficiency 167

SQL Performance

DECEMBER 9, 2020

L0 AS ( SELECT 1 AS c. Figure 1: Plan for base CTE cardinality of 2.

C++ 114

C++ Servers Testing Processing 114

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

JavaScript and TypeScript , Python , Java , C# 14. Here, we put the comparisons down as a summary for you: Features Testsigma Cypress Playwright Puppeteer TestCafe Webdriver IO Who can use it? Test cases are written in simple English Javascript only JavaScript and TypeScript , Python , Java , C# Node.js Supported Integrations?

Open Source 52

Open Source Mobile Google Infrastructure 52

SQL Performance

APRIL 13, 2022

L0 AS ( SELECT 1 AS c. Following is the first solution to our challenge, which is based on a technique that has been known for a while: WITH C AS. ( ) SELECT grp , ord , val , ROW_NUMBER ( ) OVER ( PARTITION BY grp , val , island ORDER BY ord ) AS seqno FROM C ; I’ll refer to it as Known Solution 1. . )

C++ 136

C++ Strategy Testing Servers 136

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. Now, let us make a comparison between React and Node.js. Node JS vs. React JS Comparison. The post Node vs React Comparison: Which to Choose for Your JS Project?

Open Source 52

Open Source Virtualization Programming Servers 52

The Morning Paper

MAY 16, 2019

An especially interesting comparison can be made in the case of gRPC, which has both a C implementation and a Go implementation. The following table shows the ratio of the number of goroutines created in gRPC-Go compared to gRPC-C, when processing the same number of requests.

Programming 100

Programming C++ Design Code 100

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). You’ll get some valid result, but you won’t know what the result is until your code looks at it.

C++ 73

C++ Programming Lambda Code 73

Dynatrace

JANUARY 31, 2024

Surveys from our recent Automation Pulse Report underscore this sentiment: 57% of C-level executives say the absence of data observability and data flow analysis makes it difficult to drive automation in a compliant way. Consequently, the importance of continuously observing data quality, and ensuring its reliability, is paramount.

DevOps 203

DevOps Analytics Airlines Metrics 203

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. in requires clauses, in general code).

C++ 98

C++ Testing Code Systems 98

Nick Desaulniers

SEPTEMBER 5, 2017

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. Either way, I’m thankful to have not one, but two high quality open source C/C++ compilers. Lies, damn lies, and statistics, right?

Development 75

Development C++ Open Source Engineering 75

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

Smashing Magazine

JULY 19, 2021

By adding automated visual testing , we can eliminate those flaky tests , leveling up our testing pipelines providing that coverage (and more) by taking advantage of smart image comparisons using screenshots of our website or app. Image Comparisons. An interesting thing about Visual Testing is there are different ways to handle this.

Testing 142

Testing Code Design Strategy 142

The Netflix TechBlog

JANUARY 24, 2022

Regressive build is above alert threshold Subsequent build is easily below alert threshold c) Performance tests against PRs, which had been almost constantly red (because the probability of at least one static threshold being breached was always high), are now mostly green.

Performance 210

Performance Performance Testing Metrics Testing 210

The Netflix TechBlog

OCTOBER 14, 2024

Upon closely examining the user’s Notebook, we noticed a library called pystan , which provides Python bindings to a native C++ library called stan, looked suspicious. In comparison, the terminal handler used only 0.47% CPU time. Naturally, you would think that there must be something wrong with the code running in it.

Latency 217

Latency Virtualization Traffic Processing 217

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

Smashing Magazine

AUGUST 9, 2021

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 see, because TCP is a much older protocol and not made for just loading web pages, it doesn’t know about A, B, or C. For HTTP/1.1, Large preview ). This is illustrated below.)

Transportation 145

Transportation Internet Internet Network 145

SQL Performance

AUGUST 2, 2019

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. OrderLines ol ON o. OrderID = ol. OrderDate = @OrderDate ; SELECT o. CustomerID.

Servers 95

Servers C++ Testing Systems 95

Smashing Magazine

OCTOBER 25, 2021

A comparison of a user avatar without object-fit and with object-fit: cover. c-avatar { object-fit: cover; }. A perfect use case for object-fit: cover is user avatars. The aspect ratio allowed for an avatar is often square. Placing an image in a square container could distort the image. Large preview ).c-avatar Logos List.

C++ 143

C++ Website Systems Design 143