Percona

JANUARY 17, 2019

select SQL_CALC_FOUND_ROWS FlightDate, UniqueCarrier, TailNum, FlightNum, Origin, OriginCityName, Dest, DestCityName, DepDelay, ArrDelay FROM ontime_ind o JOIN carriers c on o.carrier = c.carrier_code WHERE (carrier_name like 'United%' or carrier_name like 'Delta%') and ArrDelay > 30 ORDER by DepDelay DESC LIMIT 10G.

Cache 48

Cache C++ AWS Airlines 48

Brendan Gregg

SEPTEMBER 25, 2021

As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c. I also shared setting the clocksource in my talks and in my 2015 [Linux tunables] post. Microbenchmark os::javaTimeMillis() on both systems. us on Centos and 0.68

Speed 103

Speed Java AWS Virtualization 103

J. Paul Reed

SEPTEMBER 24, 2018

That’s why I was fascinated with the #TalkPay movement launched in 2015 by Lauren Voswinkel : people posted their job titles and salaries on Twitter, shattering notions of what was “proper” and “private” information. I’ve always believed that on-the-whole, more information is generally better. Whatever they put is fine.

DevOps 74

DevOps C++ Google Engineering 74

Rigor

JANUARY 13, 2020

Steve Souders, plus Dion Almaer, Doug Crockford, Ben Galbraith, Tony Gentilcore, Dylan Schiemann, Stoyan Stefanov, Nicole Sullivan, Nicholas C. You only have a few seconds to get compelling content onto the screen. Fail, and you can kiss your customers and profits goodbye.” ” – Andy King, 2003. Even Faster Websites.

Performance 75

Performance Social Media Website Website Performance 75

Testsigma

FEBRUARY 19, 2021

XCUITest is a UI testing framework for iOS apps that was launched by Apple in 2015. It helps the developers and QAs to test the UI of native iOS applications by leveraging Swift or Objective C programming language. SeeTest is a popular mobile automation tool in the industry and supports both image-based and object-based recognition.

Testing Tools 57

Testing Tools Mobile Testing Java 57

The Morning Paper

JUNE 2, 2019

The tricky parts then, are (a) figuring out how many samples you need to achieve a given level of reliability, (b) trying to keep that number as low as possible to minimise the data labelling / gathering requirements, and (c ) working out how many CI tests you can do with a given set of samples before they need to be refreshed.

C++ 60

C++ Strategy Testing Servers 60

Percona

JUNE 4, 2023

GA 17 October 2015 10.1.8 GA 21 October 2015 5.7.9 In-development for MySQL 8.0 (now now a release candidate) In-development for MySQL 8.0 (now now a release candidate) SQL – Window Functions Present in MariaDB Server 10.2 In-development for MySQL 8.0 (now now a release candidate) In-development for MySQL 8.0 (now

Open Source 52

Open Source Servers Storage Scalability 52

Brendan Gregg

AUGUST 26, 2021

usr/share/apport/apport %p %s %c %d %P # mkdir /var/cores. A quick look at the killsnoop(8) source reminded me that I wrote it back in 2015, which is practically ancient in eBPF years. Hit Ctrl-C to end. ^C Enabling core dumps I'm guessing it's core dumping and Ubuntu's apport is eating them. echo "/var/cores/core.%e.%p.%h.%t"

Storage 141

Storage C++ Processing Database 141

Smashing Magazine

AUGUST 9, 2021

One question I’ve often encountered is, “Why do we need HTTP/3 so soon after HTTP/2, which was only standardized in 2015?” 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.

Transportation 145

Transportation Internet Internet Network 145

SQL Performance

OCTOBER 14, 2020

Here’s the attempted solution using a CTE: WITH C AS. ( Using our trick with the TOP filter in the inner query, you prevent the unnesting of the table expression, like so: WITH C AS. ( The following code returns only shippers with a maximum order date that is on or after January 1 st , 2018: USE PerformanceV5 ; WITH C AS. (

C++ 52

C++ Servers Code Efficiency 52

Brendan Gregg

JULY 2, 2021

Then, having discovered everything is C or Python, some rewrite it all in a different language. That will be a quick and useful version 1. BPF up and running! I see people think like a programmer instead and feel they must start by learning bcc and BPF programming in depth.

Latency 144

Latency Cache Energy Systems 144

SQL Performance

APRIL 8, 2020

When I read C. For anyone who choses data as their career, I recommend reading SQL and Relational Theory: How to Write Accurate SQL Code 3rd Edition by C. Date (O'Reilly 2015). As mentioned earlier, I use the term table expression following C. My expertise is T-SQL. Dates' use of this term.

C++ 143

C++ Database Azure Servers 143

Brendan Gregg

SEPTEMBER 25, 2021

As (C) looked like a kernel rebuild, I started with (D) and (E). ## 6. I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c I also shared setting the clocksource in my talks and in my 2015 [Linux tunables] post. Microbenchmark os::javaTimeMillis() on both systems. us on Centos and 0.68

Speed 40

Speed Java AWS Virtualization 40

Enprowess

MAY 24, 2022

When one needs to make complex calculations simultaneously, then Swift, Objective-C, and Java have more speed than JavaScript since there are overheads within JavaScript to control native elements. React Native was used for the very first time in the year 2015 by Facebook for developing mobile applications. Abstraction layer issue.

Mobile 52

Mobile Open Source Virtualization Speed 52

Abhishek Tiwari

SEPTEMBER 25, 2017

ECMAScript 2015. ECMAScript 2015 (ES2015 also known as ES6) should be the obvious choice for writing React applications. You can read a detailed overview of various ECMAScript 2015 features here. You can try various ECMAScript 2015 features in the browser using JSBin without any installation. Knowledge map for React.

Architecture 40

Architecture Open Source Design C++ 40

Brendan Gregg

SEPTEMBER 25, 2021

As (C) looked like a kernel rebuild, I started with (D) and (E). I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c I also shared setting the clocksource in my talks and in my 2015 Linux tunables post. Microbenchmark os::javaTimeMillis() on both systems. Try changing the kernel clocksource.

Speed 52

Speed Java AWS Virtualization 52

The Morning Paper

NOVEMBER 21, 2019

This corpus contains every PlanOut script written between 3 August 2015 and 3 August 2017… Facebook also provided us with a corpus of manually specified contrasts that were used in the analysis of the experimentation scripts that were actually deployed.

Programming 52

Programming Internet Internet Design 52

SQL Server According to Bob

JANUARY 5, 2017

As Slava highlights in his recent blog post , he also contacted me in early 2015 to assist with supportability of SQL Server on Linux. int c = a + b; 0134167C 8B 45 F8 mov eax,dword ptr [a]. 01341682 89 45 E0 mov dword ptr [c],eax. Let’s look at a more concrete example of adding two numbers.

Servers 40

Servers Operating System C++ Software Engineering 40

Nick Desaulniers

JANUARY 25, 2015

to be published by CRC Press in time for SIGGRAPH 2015. A book I recently ordered was Scott Meyers’ Effective Modern C++. When C++ undergoes another revolution, Scott’s book may become irrelevant, at which point the adjective modern. Lets say you have three sequential sections: A, B, & C.

C++ 43

C++ Google Games Open Source 43

Enprowess

NOVEMBER 2, 2021

Seamless integration : There is no need to Re-write code because it easily integrates with Swift or Objective C for iOS apps and Java for android. It’s also referred to as a scaffold run by a C/C++ engine and a platform-specific embedder. Flutterday. Stack Overflow. How huge is the community around React Native?

Development 52

Development Social Media Mobile Code 52

Brendan Gregg

AUGUST 26, 2021

Redirecting them to the file system so I can then do core dump analysis using gdb(1) , as root: # cat /proc/sys/kernel/core_pattern |/usr/share/apport/apport %p %s %c %d %P # mkdir /var/cores # echo "/var/cores/core.%e.%p.%h.%t" Hit Ctrl-C to end. ^C Enabling core dumps I'm guessing it's core dumping and Ubuntu's apport is eating them.

Storage 40

Storage C++ Processing Database 40

Brendan Gregg

AUGUST 8, 2017

TABLE OF EXP(-T/C) FOR T = 5 SEC. EXPFF: EXP 0.920043902 ;C = 1 MIN EXP 0.983471344 ;C = 5 MIN EXP 0.994459811 ;C = 15 MIN.

Latency 111

Latency Metrics C++ Systems 111

Randon ASCII

FEBRUARY 25, 2018

The next step was a custom C++ program that opened the just-linked exe and called FlushFileBuffers on it. A twitter user shared a report of them hitting the bug in 2015 , which is not hugely shocking since this bug appears to be 8+ years old. failure rate. 7-second sleep after linking exes: 2% failure rate. Update, October 2018.

Programming 79

Programming Hardware Cache Code 79

Alex Russell

SEPTEMBER 12, 2016

In January 2015 I designed the criteria that Chrome uses to trigger “Add to Homescreen” prompts. In US educational terms, doing well in these criteria will be the difference between a C- and an A-: Mobile-friendly design. Chrome’s Progressive Web App Install prompt on the Polymer Shop demo. I’d know.

Mobile 54

Mobile Network Education Design 54

Brendan Gregg

JULY 2, 2021

Then, having discovered everything is C or Python, some rewrite it all in a different language. That will be a quick and useful version 1. BPF up and running! I see people think like a programmer instead and feel they must start by learning bcc and BPF programming in depth.

Open Source 40

Open Source Latency Cache Energy 40

Brendan Gregg

MAY 8, 2021

Update: Some modern drives after 2015 are sealed with [helium].) Hit Ctrl-C to end. To quote from an article about hard drive [air filters]: "some hard drives are not rated to exceed 7,000 feet while operating because the air pressure would be too low inside the drive to float the heads properly."

Performance 40

Performance Latency Speed Systems 40

Tim Kadlec

JANUARY 10, 2020

The Business of Expertise by David C. What I Read in 2015. The Winter of the Witch by Katherine Arden 5 ⁄ 5 I wrote a full review for The Winter of the Witch. Mismatch by Kat Holmes 5 ⁄ 5 I wrote a full review for Mismatch. Baker 4 ⁄ 5 I wrote a full review for The Business of Expertise. Great stuff! Past years.

Education 8

Education Entertainment C++ 8

Smashing Magazine

JANUARY 6, 2020

In real-life world, most products aren’t even close: an median bundle size today is around 417KB , which is up 42% compared to early 2015. In 2015, Google introduced Brotli , a new open-source lossless data format, which is now supported in all modern browsers. Assets Optimizations. Use Brotli for plain text compression.

Performance 145

Performance Cache Network Servers 145

Smashing Magazine

JANUARY 7, 2019

In real-life world, most products aren’t even close: an average bundle size today is around 400KB , which is up 35% compared to late 2015. In 2015, Google introduced Brotli , a new open-source lossless data format, which is now supported in all modern browsers. We could also go beyond the bundle size budget though.

Performance 105

Performance Cache Network Metrics 105

Smashing Magazine

JANUARY 11, 2021

compared to early 2015. In 2015, Google introduced Brotli , a new open-source lossless data format, which is now supported in all modern browsers. We could offload computationally heavy tasks off to WebAssembly ( WASM ), a binary instruction format, designed as a portable target for compilation of high-level languages like C/C++/Rust.

Performance 145

Performance Cache Media Metrics 145

Percona

JANUARY 14, 2019

codecs','imgur','floppy','codec','adobe','android'] ? ? scala','currency','println'] ? ? voting','maven'] ? ? compose','xamarin','markdown','scrum','comic'] ? ? china','sourceforge','subscription','chinese','kotlin'] ? ? systemd','gitlab','autotldr'] ? ?

Database 40

Database Analytics Blockchain Healthcare 40