Dynatrace

DECEMBER 21, 2023

Evaluating these on three levels—data center, host, and application architecture (plus code)—is helpful. And while these examples were resolved by just asking a few questions, in many cases, the answers are more elusive, requiring real-time and historical drill-downs into the processes and dependencies specific to each host.

Cloud 264

Cloud Energy Best Practices Cache 264

Dynatrace

JULY 16, 2020

I wanted to leverage Dynatrace’s Environment APIs, for example to export timeseries data, get problem stats, or change configuration settings, like enforcing a certain data privacy setting. TenantCache: a cache to store tenant information and API token information and semi-permanent data to avoid unnecessary roundtrips. ?

Cache 289

Cache Serverless Efficiency Tuning 289

John McCalpin

FEBRUARY 17, 2025

Sustainable memory bandwidth using multi-threaded code has closely followed the peak DRAM bandwidth, typically delivering best case throughput of 75%-85% of the peak DRAM bandwidth in each generation. The example below is for a 2005-era processor with 60 ns memory latency and 6.4 Units of nanoseconds (ns) are most convenient.

Latency 68

Latency Hardware Cache Systems 68

The Netflix TechBlog

OCTOBER 29, 2020

You only need to write platform-specific code where it’s necessary, for example, to implement a native UI or when working with platform-specific APIs. Almost 50% of the production code in our Android and iOS apps is decoupled from the underlying platform. Debugging Kotlin source code from Xcode.

Mobile 279

Mobile Cache Network Technology 279

CSS Wizardry

MAY 31, 2019

A classic example is jQuery, that we might link to like so: There are a number of perceived benefits to doing this, but my aim later in this article is to either debunk these claims, or show how other costs vastly outweigh them. Users might already have the file cached. Penalty: Caching. Myth: Cross-Domain Caching.

Cache 277

Cache Latency Infrastructure Website 277

Smashing Magazine

MAY 9, 2022

Performance Game Changer: Browser Back/Forward Cache. Performance Game Changer: Browser Back/Forward Cache. With that caveat out of the way, let’s get to the guts of the article: What is the Back/Forward Cache and why does it matter so much? Didn’t The HTTP Cache Do All That Anyway? Barry Pollard.

Cache 106

Cache Games Performance Website 106

Smashing Magazine

FEBRUARY 12, 2025

We can see an example of this in this request waterfall visualization. Half of the time is instead spent on a cross-origin redirect — a separate HTTP request that returns a redirect response before we can even make the request that returns the websites HTML code. TCP: Establishing a reliable connection to the server.

Servers 78

Servers Latency Cache Website 78

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. For example, the artwork service is separate from the video metadata service, but we need the data from both in the detail key.

Latency 237

Latency Cache Java Traffic 237

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. You can find more examples on “ React Higher Order Components in depth “ by Fran Guijarro. < div >.

Code 147

Code Performance Media Google 147

Alex Russell

MARCH 31, 2022

Browsers will cache tools popular among vocal, leading-edge developers. There's plenty of space for caching most popular frameworks. The best available proxy data also suggests that shared caches would have a minimal positive effect on performance. Browsers now understand the classic shared HTTP cache behaviour as a privacy bug.

Cache 89

Cache Government Traffic Network 89

CSS Wizardry

SEPTEMBER 16, 2024

Here is a neat example of observing the parallelisation in DevTools: note that Initial connection and (the incorrectly labelled) SSL are parallelised and identical: This means that HTTP/3’s worst-case model mimics TLS 1.3+0⁠-⁠RTT’s Take this client for example: the requests to their API endpoint carry a non-standard Accept-Version header.

Latency 244

Latency Cache Transportation Mobile 244

Dynatrace

MAY 17, 2023

But its underlying goal is quite humble and straightforward: it wants to enable you to observe an IT system (for example, a web application, infrastructure, or services) and gain insight to its behavior, such as performance, error rates, hot spots of executed instructions in code, and more.

Metrics 245

Metrics Open Source Traffic Cache 245

Dynatrace

DECEMBER 23, 2020

For example, you might want to move certain user action naming rules from one application to the other. Let’s take a look at two example use cases. Use the GET /applications/web/{id} endpoint to retrieve application configuration for both applications and open them in a code editor of your choice.

Monitoring 246

Monitoring Mobile Cache Testing 246

CSS Wizardry

AUGUST 24, 2022

Most metrics are not atomic: FCP, for example, isn’t a metric we can optimise in isolation—it’s a culmination of other more atomic metrics such as connection overhead, TTFB, and more. For the sake of ease, I’m going to use Largest Contentful Paint (LCP) as the example. For example, continuing our task to reduce CSS size: performance.

Benchmarking 276

Benchmarking Metrics Cache Network 276

Dynatrace

NOVEMBER 29, 2021

With Lambda, you are charged based on the number of requests for your functions and their duration (the time it takes for your code to execute) with millisecond granularity. For example, you can apply filters on different tag values by using a combination of AWS tags to identity Graviton2 versus x86 Lambda functions as shown below.

Lambda 246

Lambda AWS Serverless Metrics 246

Dynatrace

SEPTEMBER 13, 2023

For example, optimizing resource utilization for greater scale and lower cost and driving insights to increase adoption of cloud-native serverless services. Using an interactive no/low code editor, you can create workflows or configure them as code.

AWS 305

AWS Efficiency Azure Cloud 305

Dynatrace

AUGUST 30, 2019

Missing Cache Settings – Make sure you cache resources that don’t change often on the browser or use a CDN. Missing caching layers, e.g. provide a read-only cache for static data. MAMPU showed two great examples for this section; database connectivity and web-server threats.

Cache 214

Cache Database Architecture Government 214

Dynatrace

DECEMBER 20, 2021

What users see in their browser window and the underlying HTML code are both governed by the DOM, which creates a tree-like structure for all HTML elements. For example, the <body> element of your page exists on one branch of this tree structure, with any <img> assets branching off. Quicker response. The caveat?

Mobile 264

Mobile Website Analytics Cache 264

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. You can find more examples on “ React Higher Order Components in depth “ by Fran Guijarro.

Code 130

Code Performance Google Media 130

Dynatrace

DECEMBER 13, 2023

From the customer perspective, mobile devices have become the singular touchpoint between businesses and users, for example, the new storefront, office, and customer support line. For example, an app that does not crash often but is frequently slow from a user’s perspective is providing a poor user experience.

Best Practices 246

Best Practices Mobile Metrics Performance 246

Dynatrace

JUNE 18, 2019

Moreover, features like Instant Run and the Gradle Build Cache weren’t supported. Out-of-the-box support for Instant Run and the Gradle Build Cache make the auto-instrumentation process barely noticeable. To understand the new capabilities, have a look at the examples below. Example 1 shows the most basic configuration.

Cache 35

Cache Java Monitoring Tuning 35

The Netflix TechBlog

MAY 4, 2023

Adding forking logic and complexity to the device code can create dependencies on device application release cycles that generally run at a slower cadence than service release cycles, leading to bottlenecks in the migration. There is also an increased risk that bugs in the replay logic have the potential to impact production code and metrics.

Traffic 343

Traffic Latency Tuning Systems 343

The Netflix TechBlog

JULY 12, 2019

The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses. Near : the cache exists in RAM on any instance which requires access to the dataset.

Cache 183

Cache Architecture Engineering Latency 183

Speed Curve

JANUARY 19, 2025

This slide really stuck out to me as an example of how we collectively have a huge impact on the user experience: You know when you are measuring success in 'years of time saved' that you've had a meaningful impact. Of course writes were much less common than reads, so I added a caching layer for reads, and that did the trick.

Performance 98

Performance Google Speed Metrics 98

The Netflix TechBlog

OCTOBER 16, 2019

One example displaying the need for dataset propagation: at any given time Netflix runs a very large number of A/B tests. For example, you could configure a topic to retain 10 versions or 10 days of versions. for example by region, application, or cluster. for example to train machine-learned models.

Cache 189

Cache Architecture Metrics Java 189

Dynatrace

MARCH 22, 2023

For these, it’s important to turn off auto-completing forms, encrypt data both in transit and at rest with up-to-date encryption techniques, and disable caching on data collection forms. To avoid these problems, set up automated DevSecOps release validation and security gates so that no insecure code progresses to production.

Open Source 246

Open Source Artificial Intelligence Internet Internet 246

The Netflix TechBlog

SEPTEMBER 10, 2024

As the scale of the messages being processed increased and we were making more code changes in the message processor, we found ourselves looking for something more flexible. For example, for a recent 24 hour period, direct messages averaged around 160,000 messages per second and indirect averaged at around 50,000 messages per second.

Latency 230

Latency Cache Tuning Efficiency 230

SQL Performance

OCTOBER 13, 2021

I also compare them with stored procedures, mainly focusing on differences in terms of default optimization strategy, and plan caching and reuse behavior. In my examples I’ll use a sample database called TSQLV5. An Example. GetTopCustOrders ( 1 , 3 ) ; I’ll refer to this example as Query 1. iTVFs vs.

Cache 144

Cache Strategy C++ Code 144

The Netflix TechBlog

JULY 1, 2019

Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory. Surface Cache Surface cache is a reserved pool in main memory (or separate graphics memory on a minority of systems) that the Netflix app uses for storing textures (decoded images and cached resources).

Cache 166

Cache Design Testing Development 166

Smashing Magazine

DECEMBER 23, 2020

You’ll also find example code or references to more specific guides so you can implement these tips to your PWA. The service workers enable the offline usage of the PWA by fetching cached data or informing the user about the absence of an Internet connection. Cached content with IndexedDB. Service Workers.

Cache 136

Cache Internet Internet Google 136

The Netflix TechBlog

NOVEMBER 4, 2019

As an example, our data is centered around a creative service to keep track of the creatives we build. Best of all, our page can load much faster since everything is cached in Elasticsearch. For example, if a title ranking changes, we need to find the related show, then its corresponding creative, and reindex it.

Database 243

Database Cache Servers Performance 243

All Things Distributed

SEPTEMBER 3, 2013

Get it wrong and you’re looking at sleepless nights, struggling to keep up with growth and fighting to keep your app available while you rewrite critical portions of your code. Amazon ElastiCache is a fully managed, in-memory caching service for customers to optimize the latency, performance and cost of their read workloads.

Cache 99

Cache Cloud Performance Retail 99

Smashing Magazine

SEPTEMBER 28, 2022

Every unnecessary bit of JavaScript code you bundle and serve will be more code the client has to load and process. How will you serve blazingly fast code, then? Jamstack is popular with documentation sites that usually compile code to HTML files and host them on the CDN. Active Memory Caching. Caching Schemes.

Cache 141

Cache Performance Servers Architecture 141

Testsigma

JUNE 3, 2021

Example: An e-commerce website is unable to process the payment part. For example, a user has submitted a form, and the progress bar is showing no progress or activity then the user will get confused if the form has been submitted successfully or not. Example: divide by zero, multiplication of 2 large numbers, etc.

Software 82

Software Software Testing Hardware 82

Dynatrace

OCTOBER 15, 2021

Traces are the act of following a process (for example, an API request or other system activity) from start to finish, showing how services connect. Here are the steps the solution takes, and the data it generates along the way: Instruments your code with APIs, telling system components what metrics to gather and how to gather them.

Open Source 246

Open Source Metrics Cloud Transportation 246

CSS Wizardry

NOVEMBER 9, 2018

This is best illustrated with an example. 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. 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 279

Network Performance Media Cache 279

Smashing Magazine

NOVEMBER 2, 2021

Creating A Magento PWA: Customizing Themes vs. Coding From Scratch. Creating A Magento PWA: Customizing Themes vs. Coding From Scratch. One of the reasons for that is because a PWA has the same code base. So unlike the case with native applications, the progressive web app needs to be coded only once. Alex Husar.

Code 90

Code Cache Mobile Retail 90