Brendan Gregg

OCTOBER 8, 2018

eBPF was created by Alexei Starovoitov while at PLUMgrid (he's now at Facebook) as a generic in-kernel virtual machine, with software defined networks as the primary use case. See the [reference guide] for more details. ## Script Comparison I could pick scripts that minimize or maximize the differences, but either would be misleading.

C++ 105

C++ Virtualization Programming Latency 105

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. Network: Node.js Now, let us make a comparison between React and Node.js. Node JS vs. React JS Comparison. Today, we will cover: Node.js React Overview. Which is better?

Open Source 52

Open Source Virtualization Programming Servers 52

The Netflix TechBlog

JANUARY 24, 2022

so are power levels and network bandwidth. 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 208

Performance Performance Testing Metrics Testing 208

Scalegrid

AUGUST 15, 2019

Query Code for converting queries to five target language: Java, Python, C#, PHP, and JavaScript (Node.js). Their free plan offers limited features, including connection, shell management, monitoring, data manipulation, and support, and you can compare them here on their plan comparison page.

Database 40

Database Servers Availability Monitoring 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. 90491 N|rnberg (Germany) Consulting+Networking+Programming+etc'ing 42. Network I/O? kernel/sched.c.orig Fri Oct 29 10:31:11 1993 kernel/sched.c Which type of I/O? File system I/O?

Latency 111

Latency Metrics C++ Systems 111

Highly Scalable

MAY 1, 2012

Frequencies of 100 most frequent elements can be estimated with 4% precision using Count-Min Sketch structure that uses about 48KB (12k integer counters, based on the experimental result), assuming that data is skewed in accordance with Zipfian distribution that models well natural texts, many types of web events and network traffic.

Analytics 191

Analytics Traffic Big Data Efficiency 191

The Morning Paper

JUNE 20, 2019

Most Azure code is written in.Net managed languages such as C#, reducing memory leak bugs. Microsoft is also using fuzz testing, cloud contract checking, and network configuration verification tools. In comparison, automatically generating mitigation steps has not been well studied and is worth more attention in the future.

Cloud 81

Cloud Azure Cache C++ 81

O'Reilly

SEPTEMBER 19, 2023

Hadoop’s value—being able to crunch large datasets—often paled in comparison to its costs. And that brings our story to the present day: Stage 3: Neural networks High-end video games required high-end video cards. And harder to sell a data-related product unless it spoke to Hadoop. The elephant was unstoppable.

Hardware 135

Hardware Storage Big Data Blockchain 135

Smashing Magazine

SEPTEMBER 6, 2021

Next, we’ll look at how to set up servers and clients (that’s the hard part unless you’re using a content delivery network (CDN)). Using just a few (but still more than one), however, could nicely balance congestion growth with better performance, especially on high-speed networks. Servers and Networks. Network Configuration.

Network 120

Network Servers Cache Traffic 120

SQL Server According to Bob

MAY 19, 2019

Networking Pump Threads. SQLPAL uses a dynamic set of networking, I/O pump threads to handle network requests. Disable dynamic creation of network, I/O pump threads and cap to a single background thread while allowing all threads to cooperate in network I/O pump activities. Async Pump Threads. Super Latching.

IoT 61

IoT Servers Development Cache 61

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 63

Benchmarking Database Network C++ 63

The Morning Paper

AUGUST 29, 2019

We group the DBMS design choices and tradeoffs into three broad categories, which result from the need for dealing with (A) external storage; (B) query executors that are spun on demand; and (C) DBMS-as-a-service offerings. Key findings.

Architecture 76

Architecture Cloud Storage Serverless 76

Testsigma

JANUARY 18, 2021

Network Throttling – If your app is built for a global audience, it is important to test the app features in varied network conditions (e.g. Along with testing on different network conditions, you should also check the app’s behaviour with different UL (Upload) and Download (DL) speeds.

Testing 55

Testing Operating System Website Internet 55

O'Reilly

MAY 19, 2020

However, a notable minority—some 15%—occupy C-level or executive roles. network engineer, at >2%) and management positions (IT manager, at close to 3%; operations manager at >1%). A comparison of respondent organization size and share of applications hosted in the cloud.

Cloud 144

Cloud Serverless AWS DevOps 144

Tech News Gather

SEPTEMBER 7, 2022

For instance, iPhone uses Swift or Objective C for development whereas, for Android app development, it uses Java or Kotlin as its programming language. There, when Objective C, Swift, Java, and Kotlin are mixed with their corresponding devices, they are deemed native languages. UI/UX Experience. Over To You.

Development 52

Development Mobile Java C++ 52

Brendan Gregg

NOVEMBER 3, 2020

Right now there are many BPF (eBPF) startups building networking, security, and performance products (and more in stealth), yet requiring customers to install the LLVM, Clang, and kernel header dependencies – which can consume over 100 Mbytes of storage – is an adoption drag. It adds about 1.5 Ubuntu 20.10 What about bpftrace?

C++ 40

C++ Programming Storage Code 40

Brendan Gregg

NOVEMBER 3, 2020

Right now there are many BPF (eBPF) startups building networking, security, and performance products (and more in stealth), yet requiring customers to install the LLVM, Clang, and kernel header dependencies – which can consume over 100 Mbytes of storage – is an adoption drag. It adds about 1.5 Ubuntu 20.10 What about bpftrace?

C++ 40

C++ Programming Storage Code 40

The Morning Paper

DECEMBER 8, 2019

Traditionally one of the major costs when moving data in and out of memory (be it to persistent media or over the network) is serialisation. The Twizzler KVS (key-value store) is just 250 lines of C code, and uses one persistent object for the index structure, and a second one for the data. The FOT structure has some pros and cons.

Hardware 56

Hardware Programming Media Storage 56

Brendan Gregg

OCTOBER 7, 2018

eBPF was created by Alexei Starovoitov while at PLUMgrid (he's now at Facebook) as a generic in-kernel virtual machine, with software defined networks as the primary use case. See the [reference guide] for more details. ## Script Comparison I could pick scripts that minimize or maximize the differences, but either would be misleading.

C++ 40

C++ Virtualization Programming Latency 40

Alex Russell

MAY 9, 2022

Reduced network and device capacity correlate with other access challenges. This blindspot usually extends up to the C-suite. Folks with powerful laptops, new iPhones, and low-latency networks are noticing, which is a very bad sign. Do they have a device-class or network condition target ? Management Attributes #.

Performance 99

Performance Latency Metrics Engineering 99

Brendan Gregg

SEPTEMBER 5, 2017

Hit Ctrl-C to end. ^C C operation = 'read' usecs : count distribution 0 -> 1 : 0 | | 2 -> 3 : 0 | | 4 -> 7 : 4479 | *| 8 -> 15 : 1028 | | 16 -> 31 : 14 | | 32 -> 63 : 1 | | [.]. At my employer we sometimes use SR-IOV for direct network interface access, and NVMe for direct disk access. Tracing ZFS operation latency.

Virtualization 75

Virtualization AWS Engineering Hardware 75

Percona

MAY 2, 2023

Especially if going into or out of storage types that may throttle bandwidth/network traffic. Storage destination: Backups stored on the same disk as the database can impact read and write operations, while backups stored on a remote server can increase network traffic and cause latency.

Best Practices 52

Best Practices Database Storage Servers 52

Smashing Magazine

AUGUST 22, 2021

As we will see, QUIC and HTTP/3 indeed have great web performance potential, but mainly for users on slow networks. If your average visitor is on a fast cabled or cellular network, they probably won’t benefit from the new protocols all that much. An often used metaphor is that of a pipe used to transport water. Congestion Control.

Performance 109

Performance Network Latency Servers 109

Smashing Magazine

AUGUST 9, 2019

You can see timings like these for any asset in Chrome in Developer Tools via Network -> Click on your asset -> Timing tab. You can also view this here , where real network conditions will be applied, so you can run your own tests. c-button { // styles et al } // any other class declarations }. This means a whopping 94.8%

Performance 97

Performance C++ Media Website 97

The Morning Paper

DECEMBER 7, 2020

Say we want to know whether a word embedding for a concept $c$ has a gender bias. We can take the cosine distance between $c$ and ‘Man’ and subtract the cosine distance between $c$ and ‘Woman’. Measuring bias in word embeddings. A call to action.

Social Media 78

Social Media Media C++ Architecture 78

Smashing Magazine

OCTOBER 26, 2018

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. Comparison graph depicting response times of using WordPress REST API vs using the decoupled approach with added plugins. Security concerns.

Cache 88

Cache Website Speed Testing 88

SQL Server According to Bob

JANUARY 11, 2020

url=/library/en-us/fileio/fs/sparse_files.asp ) ​​ on the ​​ Microsoft Developer Network ​​ (MSDN). Note: ​​ Pages that are nev er modified ( never​​ dirtied) remain in the clean state until they are dis c arded at which time the checksum is validated for the constant page.

Servers 40

Servers Cache Database Media 40

Smashing Magazine

JANUARY 11, 2021

Networking, HTTP/2, HTTP/3 OCSP stapling, EV/DV certificates, packaging, IPv6, QUIC, HTTP/3. Alternatively, you can also use: Addy Osmani’s Chrome UX Report Compare Tool , Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). 300ms RTT, 1.6

Performance 145

Performance Cache Metrics Media 145

Smashing Magazine

AUGUST 26, 2021

A bookshop makes for a decent real-world comparison point for an online publication. If you run a shoe store and let a social network track your users so you can target ads to them there later, know that that data, which reveals who is interested in shoes, will also be used to show them shoe ads for your competitors.

Social Media 143

Social Media Technology Technology Website 143

Smashing Magazine

JANUARY 6, 2020

Alternatively, you can also use Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). Paddy Ganti’s script constructs two URLs (one normal and one blocking the ads), prompts the generation of a video comparison via WebPageTest and reports a delta.

Performance 112

Performance Cache Servers Network 112

Smashing Magazine

JANUARY 7, 2019

To get a good first impression of how your competitors perform, you can use Chrome UX Report ( CrUX , a ready-made RUM data set, video introduction by Ilya Grigorik), Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). 150ms RTT, 1.5 Mbps down, 0.7

Performance 111

Performance Cache Network Metrics 111

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. Blame The Network The next theory was that the network between the web browser UI (on the laptop) and the JupyterLab server was slow.

Latency 214

Latency Virtualization Traffic Processing 214