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 243

Latency Cache Java Traffic 243

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 222

Cloud Energy Best Practices Cache 222

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

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 93

Cache Games Performance Website 93

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 236

Cache Serverless Efficiency Tuning 236

The Netflix TechBlog

NOVEMBER 12, 2024

Best Effort Regional Counter This type of counter is powered by EVCache , Netflix’s distributed caching solution built on the widely popular Memcached. Reducing Code Complexity : We reduce a lot of code complexity in Counter Abstraction by delegating a major portion of the functionality to an existing service.

Latency 253

Latency Cache Infrastructure Strategy 253

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

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 215

Latency Cache Transportation Mobile 215

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 349

Traffic Latency Tuning Systems 349

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 255

Mobile Website Analytics Cache 255

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 205

Cache Database Architecture Government 205

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 249

Benchmarking Metrics Cache Network 249

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 221

Monitoring Mobile Cache Testing 221

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 225

Lambda AWS Serverless Metrics 225

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 184

Cache Architecture Latency Engineering 184

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 193

Cache Architecture Metrics Java 193

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 233

Latency Cache Tuning Efficiency 233

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 259

AWS Efficiency Azure Cloud 259

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.

Cache 248

Cache Database Servers Performance 248

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 167

Cache Design Testing Development 167

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 192

Metrics Open Source Traffic Cache 192

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 211

Best Practices Mobile Metrics Performance 211

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 101

Cache Cloud Performance Retail 101

The Netflix TechBlog

DECEMBER 19, 2024

A natural solution is to make flows configurable using configuration files, so variants can be defined without changing the code. Unlike parameters, configs can be used more widely in your flow code, particularly, they can be used in step or flow level decorators as well as to set defaults for parameters.

Best Practices 145

Best Practices Cache Metrics Code 145

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

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

The Netflix TechBlog

NOVEMBER 23, 2020

For example, Arista’s EOS provides eAPI, a RESTful service using JSON payloads. Here is a example of what some of these leaves may look like: Tree example generated by pyang. The gRPC code is auto-generated from the gNMI protobuf model and gNMI carries the data modeled in OpenConfig, which has some encoding.

Open Source 188

Open Source Network Transportation Cache 188

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 126

Cache Internet Internet Google 126

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 211

Open Source Artificial Intelligence Internet Internet 211

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 230

Open Source Metrics Cloud Transportation 230

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 27

Cache Java Monitoring Tuning 27

Scalegrid

JANUARY 25, 2024

Effective management of memory stores with policies like LRU/LFU proactive monitoring of the replication process and advanced metrics such as cache hit ratio and persistence indicators are crucial for ensuring data integrity and optimizing Redis’s performance. <code> 127.0.0.1:6379> <code> 127.0.0.1:6379>

Metrics 130

Metrics Monitoring Latency Cache 130

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 128

Cache Performance Servers Architecture 128

CSS Wizardry

AUGUST 7, 2019

only to find that the resource they’re requesting isn’t in that PoP ’s cache. Application runtime: It’s kind of obvious really, but the time it takes to run your actual application code is going to be a large contributor to your TTFB. For example, request collapsing , edge-side includes , etc.).

Latency 271

Latency Ecommerce Servers Mobile 271

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. For example, the notions of entry point, controller, filter, and bean.

Java 80

Java Cache Benchmarking Programming 80