The Netflix TechBlog

SEPTEMBER 8, 2020

On the Android team, while most of our time is spent working on the app, we are also responsible for maintaining this backend that our app communicates with, and its orchestration code. Image taken from a previously published blog post As you can see, our code was just a part (#2 in the diagram) of this monolithic service.

Latency 233

Latency Cache Java Traffic 233

Brendan Gregg

MARCH 16, 2024

Apart from library code, maybe your application doesn't have frame pointers either, in which case everything is broken. Only in extreme circumstances does the cost (in processor time and I-cache footprint) translate to a tangible benefit - circumstances which usually resort to hand-coded assembly anyway.

Java 145

Java Cache Google Hardware 145

Jos

APRIL 6, 2018

We are explicit about our dependencies, so we know what code we need to run to run a specific component. Lazy-loading and bundle splitting can have a huge impact on page performance: less code requested, parsed, and executed. Componentizing generally makes testing and maintenance easier.

Code 147

Code Performance Media Google 147

Jos

APRIL 5, 2018

We are explicit about our dependencies, so we know what code we need to run to run a specific component. Lazy-loading and bundle splitting can have a huge impact on page performance: less code requested, parsed, and executed. Componentizing generally makes testing and maintenance easier.

Code 130

Code Performance Google Media 130

Dynatrace

NOVEMBER 28, 2022

For AWS Lambda, the largest contributor to startup latency is the time spent initializing an execution environment, which includes loading function code and initializing dependencies. With SnapStart enabled, function code is initialized once when a function version is published. What is Lambda? What is Lambda SnapStart?

Lambda 225

Lambda AWS Serverless Latency 225

CSS Wizardry

MAY 31, 2019

Users might already have the file cached. If website-a.com links to [link] , and a user goes from there to website-b.com who also links to [link] , then the user will already have that file in their cache. Penalty: Caching. This makes it very safe and sensible to enforce a reasonably aggressive cache policy. to just 3.6s.

Cache 274

Cache Latency Infrastructure Website 274

The Morning Paper

SEPTEMBER 24, 2020

Static analysis of Java enterprise applications: frameworks and caches, the elephants in the room , Antoniadis et al., Being static , it has the advantage that analysis results can be produced solely from source code without the need to execute the program. PLDI’20. Enterprise applications have (more than?) sound-modulo-analysis.

Java 80

Java Cache Benchmarking Programming 80

Testsigma

JUNE 3, 2021

These are the errors that also need attention during the testing phase. We can divide the errors during software development into two sections for easy understanding: Software errors Testing errors. These errors are caught during software documentation testing. Testing errors. Software errors. User interface errors.

Software 82

Software Software Testing Hardware 82

Percona

SEPTEMBER 1, 2023

Per-Row Execution : For each affected row, the trigger’s code is executed. This code can include SQL statements, procedures, or other actions defined within the trigger. Access to OLD and NEW Values : Within the trigger code, you can access the OLD and NEW values for each column of the current row.

Cache 61

Cache Database Games Healthcare 61

Smashing Magazine

NOVEMBER 26, 2021

It can also have tests that are flaky and don’t inspire any confidence. However, there are a few ways in which you can make a large code-base easy to maintain. In certain cases, the build will fail if there are type mismatches in your code as Next.js We recommend using code editor type checking during development.”.

Cache 143

Cache Code Testing Design 143

Dynatrace

DECEMBER 23, 2020

Use the GET /applications/web/{id} endpoint to retrieve application configuration for both applications and open them in a code editor of your choice. In your code editor, insert the extracted action naming rules and placeholders into the configuration of the production environment.

Monitoring 208

Monitoring Mobile Cache Testing 208

ScaleOut Software

MAY 15, 2014

We have spent a great deal of time at ScaleOut Software re-architecting our in-memory data grid (IMDG)’s code base to make best use of many cores and large memory. Testing Scale-Up Performance. So our comments will be confined to what testing we felt was valuable and how well SOSS performed. That’s actually quite fast. (We

Cache 40

Cache Servers Network Design 40

Smashing Magazine

JULY 18, 2022

There are many use cases: personalization, internationalization, theming, multi-tenancy, A/B tests…. If anything makes the JavaScript code fail, the paid user won’t have their dose of fun and might get angry. implements those Edge Handlers as “middlewares,” so you can code them in JavaScript. Congratulations On Your New Job.

Cache 116

Cache Website Energy Servers 116

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

Speed Curve

DECEMBER 6, 2023

At a glance you can see: The status of the deploy The status of your performance budgets (if you have created budgets) An aggregate metric for all of the URLs tested in the deploy (set to Largest Contentful Paint by default) Clicking on any deployment in the list brings up your Deployment Details dashboard.

Cache 57

Cache Retail Testing Code 57

Dynatrace

SEPTEMBER 13, 2023

Using an interactive no/low code editor, you can create workflows or configure them as code. Storing frequently accessed data in faster storage, usually in-memory caching, improves data retrieval speed and overall system performance. Beyond If so, test against the response time objective under the same Site Reliability Guardian.

AWS 246

AWS Efficiency Azure Cloud 246

CSS - Tricks

FEBRUARY 3, 2021

Back/forward cache — I always assumed browsers just do fancy stuff with the back/forward buttons and us developers had very little control. Philip Walton tells us it’s critical that we understand “what makes pages eligible (and ineligible) for bfcache to maximize their cache-hit rates.”

Performance 91

Performance Cache Testing Code 91

SQL Performance

MARCH 29, 2022

Simple parameterization has a number of quirks in this area, which can result in more parameterized plans being cached than expected, or finding different results compared with the unparameterized version. Reputation = 252552 ; These statements result in six cached plans, three Adhoc and three Prepared : Different guessed types.

Cache 90

Cache Servers Database Testing 90

Smashing Magazine

OCTOBER 26, 2021

Nx is an open-source build framework that helps you architect, test, and build at any scale — integrating seamlessly with modern technologies and libraries, while providing a robust command-line interface (CLI), caching, and dependency management. Nx provides standard tools for testing and styling in your Next.js

Cache 111

Cache Servers Code Storage 111

MachMetrics

JUNE 30, 2021

Many people often confuse site speed with page speed grades of performance testing tools, which are actually calculated based on multiple factors of a page including its loading speed. Average page loading time varies based on the testing environment. Check this image – Average page load time in 2021.

Cache 78

Cache Speed Google Website 78

John McCalpin

APRIL 25, 2023

For most high-end processors these values have remained in the range of 75% to 85% of the peak DRAM bandwidth of the system over the past 15-20 years — an amazing accomplishment given the increase in core count (with its associated cache coherence issues), number of DRAM channels, and ever-increasing pipelining of the DRAMs themselves.

Benchmarking 97

Benchmarking Cache Latency Tuning 97

KeyCDN

DECEMBER 8, 2022

Many factors affect the speed of your WordPress website; some of them are: Your web host Server-side optimizations (PHP version, compression, caching, etc.) Page loading speed test Before conducting any further tests, a website owner must determine at what speed his website loads. So let's discuss the process one step at a time.

Cache 52

Cache Website Speed Website Performance 52

SQL Performance

MARCH 22, 2022

In this first part, after a quick introduction, I look at the effects of simple parameterization on the plan cache. Still, you should write code with both close to the front of your mind. For legacy applications or other third-party code that cannot be easily changed, explicit parameterization may not always be possible.

Cache 61

Cache Servers Database Code 61

KeyCDN

AUGUST 29, 2019

Running speed tests with tools like Google PageSpeed Insights , WebPageTest , or KeyCDN’s Website Speed Test are always a good way to help gauge your website’s performance. We decided to experiment with our test site and after some tweaking, we were easily able to achieve a 100/100 score on PageSpeed Insights.

Google 103

Google Cache Speed Analytics 103

Dynatrace

APRIL 21, 2022

Using high-fidelity metrics, logs, code-level tracing, and a dynamic topology map of your applications, Davis can identify the precise root cause and prioritize its business impact. Missing caching layers. Instead, it remains up to human experts to correlate and analyze the data in time-consuming war rooms. Reliability.

Azure 188

Azure Monitoring Virtualization Metrics 188

Smashing Magazine

MAY 16, 2022

Examples of non-timing information you could send: HTTP Response status code, regions, request ids, etc. This is how they offer drop-in monitoring of all requests being made without us needing to change our code to monitor a request. Code used to monitor resources (fetch, XHR, images, stylesheets, scripts, HTML, etc.)

Servers 94

Servers Monitoring Cache Network 94

Percona

DECEMBER 20, 2023

The InnoDB buffer pool acts as a powerhouse for MySQL, caching frequently accessed data and index pages in memory to accelerate query performance. The following is a sample PMM dashboard that shows the multiple buffer pool resize operations during my tests. Importance of monitoring the InnoDB buffer pool resize Since MySQL 5.7.5,

Monitoring 89

Monitoring Code Open Source Cache 89

MachMetrics

FEBRUARY 27, 2020

However, you have likely used the Web UI that Google uses to allow you to test websites for speed – Google PageSpeed Insights. Lighthouse is a completely open-source tool that allows users to test any website in a multitude of ways. Finally, decide if you want to throttle your test to a certain speed, and run the audit.

Google 82

Google Speed Testing Tools Testing 82

Dotcom-Montior

AUGUST 5, 2020

Running a website speed test can help to determine what factors may be slowing your pages down. There are tools available such as Dotcom-Monitor’s free speed test that you can utilize to gauge performance. The tool gives you the option to run a speed test from 25 locations around the world. Optimize Your Pages.

Website 92

Website Speed Cache Traffic 92

Sutter's Mill

SEPTEMBER 28, 2023

Started self-hosting I haven’t spent a lot of time yet converting cppfront’s own code from today’s syntax 1 to my alternate syntax 2 (which I’m calling “Cpp1” and “Cpp2” for short), but I started with all of cppfront’s reflection API and metafunctions which are now mostly written in Cpp2.

C++ 94

C++ Cache Code Design 94

CSS Wizardry

NOVEMBER 9, 2018

In fact, Google Analytics even tell us what to do, and they’re right: Copy and paste this code as the first item into the of every webpage you want to track. Test, test, test. We’re also able to adopt a more deliberate caching strategy, only cache busting the files that need it and leaving the rest untouched.

Network 278

Network Performance Media Cache 278

SQL Performance

APRIL 13, 2020

His version can be used for the plan cache – the only challenge there is the information is transient, so you may not capture every query that uses a particular index. If possible, I'll also consider execution counts (from Query Store or the plan cache) to not just understand what query uses an index, but how frequently that query executes.

Tuning 137

Tuning Cache Metrics Testing 137

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

FEBRUARY 5, 2018

FILE cache type was the default leading to incorrect principal errors. The klist utility is helpful to show things like the currently cached Kerberos information. Ticket cache: KEYRING:persistent:0:0. Hint: On testing systems (use with extreme caution) I often set the KDC policy to disable password updates for machine accounts.

Servers 40

Servers Code Cache Traffic 40

Speed Curve

JUNE 18, 2019

Some sort of performance gateway that only allows changes to production code if they meet performance requirements? With sufficient automated testing, you can have a high level of confidence that an isolated change can be built and integrated without breaking anything else. So where in a CI/CD pipeline do we put performance testing?

Performance Testing 49

Performance Testing Testing Performance Cache 49

Dotcom-Montior

MARCH 6, 2022

Some of those factors include the following: URL Test Location Browser (Chrome, Firefox, Internet Explorer, mobile browsers etc…) Connection Number of Tests Repeat View Elements Used in Waterfall Charts Interactive Slider : The Interactive Slider is an indicator of the performance of each element in terms of milliseconds.

Performance 52

Performance Cache Website Speed 52

Smashing Magazine

JUNE 2, 2021

Add to that the payment provider drop-in, and you have yourself some pages that no one will want to touch once they have been properly tested and work. And while you can usually cache the full page of an article, the same is not true of many shop pages and elements. Large preview ). Large preview ).

Performance 117

Performance Cache Website Mobile 117