CSS Wizardry

OCTOBER 16, 2023

Compressing them over the network: Which compression algorithm, if any, will we use? Caching them at the other end: How long should we cache files on a user’s device? In our specific examples above, the one-big-file pattern incurred 201ms of latency, whereas the many-files approach accumulated 4,362ms by comparison.

Cache 291

Cache Latency Strategy Speed 291

The Netflix TechBlog

SEPTEMBER 8, 2020

This allows the app to query a list of “paths” in each HTTP request, and get specially formatted JSON (jsonGraph) that we use to cache the data and hydrate the UI. For example, the artwork service is separate from the video metadata service, but we need the data from both in the detail key.

Latency 233

Latency Cache Java Traffic 233

The Netflix TechBlog

AUGUST 10, 2020

In addition, with 193M members and counting, there is a huge diversity in the networks that stream our content as well as in our members’ bandwidth. It is, thus, imperative that we are sensible in the use of the network and of the bandwidth we require. AV1 being a recent example. 264/AVC Main profile per-title encodes.

Innovation 239

Innovation Traffic Network Efficiency 239

Percona

JUNE 22, 2023

Let’s dive in and learn how (and what) to effectively monitor MySQL performance, along with examples from PMM, by understanding the critical KPIs to watch for. This includes metrics such as query execution time, the number of queries executed per second, and the utilization of query cache and adaptive hash index.

Performance 106

Performance Monitoring Traffic Database 106

HammerDB

APRIL 19, 2023

As database performance is heavily influenced by the performance of storage, network, memory, and processors, we must understand the upper limit of these key components. For example, if you are buying the latest Amazon memory-optimized EC2 instance (R7iz), the AWS page ( [link] ) tells us the following: Up to 3.9 4.22 %usr 38.40

Performance 54

Performance Benchmarking Cache Storage 54

Dynatrace

MAY 2, 2019

This blog post introduces the new REST API improvements and some best practices for streamlining API requests and decreasing load on the API by reducing the number of requests required for reporting and reducing the network bandwidth required for implementing common API use cases. Best practice: Increase result set limits by reducing details.

Best Practices 128

Best Practices Monitoring Cache Speed 128

CSS Wizardry

MAY 19, 2020

It’s widely accepted that self-hosted fonts are the fastest option: same origin means reduced network negotiation, predictable URLs mean we can preload , self-hosted means we can set our own cache-control. For each test, I captured the following metrics: First Paint (FP): To what extent is the critical path affected?

Google 364

Google Media Latency Metrics 364

CSS Wizardry

AUGUST 7, 2019

However, one metric I feel that front-end developers overlook all too quickly is Time to First Byte (TTFB). The reason is because mobile networks are, as a rule, high latency connections. only to find that the resource they’re requesting isn’t in that PoP ’s cache. For example, request collapsing , edge-side includes , etc.).

Latency 269

Latency Ecommerce Servers Mobile 269

Scalegrid

APRIL 16, 2020

Let’s walk through an example: Database: MySQL. A vast majority of the features are the same, outside of these advanced features available through the BYOC model: Virtual Private Clouds / Virtual Networks. This becomes really important for cache solutions like Redis™. Cloud Provider: AWS. Replication Type: Master-Slave-Slave.

Cloud 242

Cloud Azure AWS Database 242

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 82

Cache Government Traffic Network 82

Jos

JUNE 2, 2018

One could argue this is a metric-driven decision. This is difficult to prove because developers will say that “the experience” is what they are seeing on their computers using, for example, Google Chrome. Simulate bad network conditions and slow CPUs and make your project resilient. Well, not so fast. Only then it will be built.

Performance 237

Performance Speed Google Media 237

Adrian Cockcroft

JANUARY 29, 2023

The common way to deal with this is to measure percentiles, and track the 90%, 99% response times for example. For example lets say you have a 99% within 2 seconds SLA, and your current 99%ile measured over one minute is 1 second. However it’s very difficult to decide what the right SLA is, or to tell how close you are to exceeding it.

Lambda 98

Lambda Latency Cache C++ 98

CSS - Tricks

JULY 25, 2019

Cache-Headers missing? Lighthouse records metrics from the browser, applies a scoring model to them, and presents an overall performance score. Guidelines for improvement are suggested based on how specific metrics score. During performance tests, Lighthouse records many metrics focused on what a user sees and experiences.

Google 71

Google Engineering Speed Mobile 71

Smashing Magazine

JANUARY 15, 2019

The key metric for measuring the sustainability of a digital product is its energy usage. This includes the work done by the server, the client and the intermediary communications networks that transmit data between the two. An obvious metric here is CPU usage, but memory usage and other forms of data storage also play their part.

Website Performance 73

Website Performance Website Energy Performance 73

Brendan Gregg

AUGUST 18, 2019

For example, iostat(1), or a monitoring agent, may tell you your average disk latency, but not the distribution of this latency. bpftrace is suited for this kind of analysis: decomposing metrics into distributions or per-event logs, and creating new metrics for visibility into blind spots. For example: # biolatency.bt

Latency 68

Latency C++ Cache Programming 68

All Things Distributed

NOVEMBER 26, 2013

About 5 years ago, I introduced you to AWS Availability Zones, which are distinct locations within a Region that are engineered to be insulated from failures in other Availability Zones and provide inexpensive, low latency network connectivity to other Availability Zones in the same region.

Cloud 145

Cloud AWS Traffic Latency 145

Smashing Magazine

NOVEMBER 2, 2021

Moreover, Garten-und-Freizeit, a German e-commerce store that sells furniture, saw an amazing improvement in their metrics after getting a PWA. Below is an example of the Netatmo PWA. Check out how the “Add to Home Screen” feature works on the example below taken on the Apivita Magento PWA. Image credit: Garten-und-Freizeit.

Code 74

Code Cache Retail Mobile 74

Jos

JUNE 2, 2018

One could argue this is a metric-driven decision. This is difficult to prove because developers will say that “the experience” is what they are seeing on their computers using, for example, Google Chrome. Again, it’s easy to fake performance optimization by leaving out the bad metrics, blocking users who spoil the stats.

Performance 130

Performance Speed Google Media 130

ACM Sigarch

MARCH 18, 2019

Existing systems can be studied with measurement, while prospective systems are most often studied by extrapolating from measurements of prior systems or via simulation software that mimics target system function and provides performance metrics. an instruction or network transaction). Consider an example and literature pointers.

Systems 60

Systems Latency Performance Analytics 60

Scalegrid

DECEMBER 21, 2023

Buckle up as we delve into the world of Redis® monitoring, exploring the most important Redis® metrics, discussing essential tools, and even peering into the future of Redis® performance management. Identifying key Redis® metrics such as latency, CPU usage, and memory metrics is crucial for effective Redis monitoring.

Strategy 130

Strategy Monitoring Latency DevOps 130

The Netflix TechBlog

JUNE 14, 2023

The GraphQL shim enabled client engineers to move quickly onto GraphQL, figure out client-side concerns like cache normalization, experiment with different GraphQL clients, and investigate client performance without being blocked by server-side migrations. So, we relied on higher-level metrics-based testing: AB Testing and Sticky Canaries.

Traffic 353

Traffic Latency Cache Metrics 353

Smashing Magazine

NOVEMBER 22, 2021

While mobile devices have come a long way in terms of network and CPU speed, many of them are still significantly underpowered when compared to desktops, especially in countries where mobile connectivity is still poor. Better tooling and metrics standardization. Measuring And Monitoring.

Website 126

Website Performance Google Media 126

Dynatrace

AUGUST 1, 2022

Interestingly, our partner RedHat reported in 2021 that around 80% of deployed workloads are databases or data caches, storing data in persistent volume claims (PVCs). Famous examples include Redis , PostgreSQL , MySQL, and MongoDB. You quickly realize that it will take ages to fill up the overprovisioned database storage.

Storage 184

Storage Database Network Metrics 184

Smashing Magazine

OCTOBER 31, 2023

But do you know how Lighthouse calculates performance metrics like First Contentful Paint (FCP), Total Blocking Time (TBT), and Cumulative Layout Shift (CLS)? Still, there’s nothing in there to tell us about the data Lighthouse is using to evaluate metrics. But it comes with caveats.

Speed 97

Speed Google Website Metrics 97

Scalegrid

AUGUST 30, 2019

Depending on how it is configured, Redis can act like a database, a cache or a message broker. Session Cache: Many websites leverage Redis Strings to create a session cache to speed up their website experience by caching HTML fragments or pages. Let’s look at an example: LPUSH list x # now the list is "x".

Cache 232

Cache Ecommerce Social Media Database 232

Smashing Magazine

AUGUST 3, 2023

Google’s Core Web Vitals is a set of performance metrics that site owners can use to evaluate performance and diagnose performance issues. These metrics provide a different perspective on user experience: Largest Contentful Paint (LCP) Measures the time it takes for the main content on a webpage to load. One of the key Next.js

Performance 74

Performance Cache Traffic Metrics 74

The Netflix TechBlog

NOVEMBER 23, 2020

Introducing gnmi-gateway: a modular, distributed, and highly available service for modern network telemetry via OpenConfig and gNMI By: Colin McIntosh, Michael Costello Netflix runs its own content delivery network, Open Connect , which delivers all streaming traffic to our members. Some leaves are removed for brevity.

Open Source 186

Open Source Network Transportation Cache 186

CSS - Tricks

APRIL 1, 2021

Site performance is potentially the most important metric. Having a slow site might leave you on page 452 of search results, regardless of any other metric. Using a network request inspector, I’m going to see if there’s anything we can remove via the Network panel in DevTools.

Cache 92

Cache Social Media Media Website 92

Smashing Magazine

FEBRUARY 27, 2024

If you haven’t heard, INP is replacing the First Input Delay (FID) metric, something you can read all about here on Smashing Magazine as a guide to prepare for the change. We can use it to report the load time of elements on the page, even going so far as to report on Core Web Vitals metrics in real time.

Performance 95

Performance Metrics Monitoring Google 95

Smashing Magazine

MAY 16, 2022

In this piece, we will dive deeper to show how Server-Timing headers are so uniquely powerful, show some practical examples by solving challenging monitoring problems with this header, and provoke some creative inspiration by combining this technique with service workers. Let’s look at this in a complete example. Setting Server-Timing.

Servers 92

Servers Monitoring Cache Network 92

MachMetrics

MARCH 21, 2019

Web performance metrics track the efficiency (or lack thereof) of any individual aspect of your website’s performance. Once you have started collecting some of these must-track web performance metrics for your website, inefficiencies will become clearer. Top 10 Web Perf Metrics to Track. Time to First Byte.

Metrics 74

Metrics Social Media Performance Speed 74

Highly Scalable

AUGUST 20, 2013

Consider an example where relation R is joined with relation S on a numerical key k and a simple modulo-based hash function is used to produce the partitions (it is assumes that the data initially distributed among the processors based on some other policy): The divide and broadcast join algorithm is illustrated in the figure below.

Big Data 154

Big Data Processing Lambda Database 154

Smashing Magazine

AUGUST 30, 2021

Even in this basic example, we’ve managed to reduce the overall file size from 76 bytes to 55 bytes, resulting in a 23% reduction. Let’s consider the following example of an unoptimized CSS codebase.page { display: grid; grid-gap: 16px; } @media (min-width: 768px) {.page . /* Before - optimized code with formatting */.container

Media 108

Media Performance Cache Strategy 108

Smashing Magazine

JULY 18, 2022

If users have a slow network or a slow computer, they will see an ugly loader while their joke is being downloaded. The “stale-while-revalidate” cache control strategy can reduce the TTFB issue by serving a cached version of the page until it’s updated. Example: /with-jokes/my-article , /bland/my-article.

Cache 114

Cache Website Energy Servers 114

Dynatrace

AUGUST 30, 2019

A well-established metric we provide is APDEX , which tell us how users are perceiving page load times (time to the first byte, page speed, speed index), errors (JavaScript errors, crashes,) and also factors in the overall user journey (each user interaction) including their environment (browser, geolocation, bandwidth). N+1 Query Pattern.

Cache 195

Cache Architecture Database Government 195

All Things Distributed

SEPTEMBER 3, 2013

For example, even within relational databases, some of the 3rd party apps we use at Amazon are only certified to run using Oracle databases whereas others use MySQL databases. Amazon ElastiCache is a fully managed, in-memory caching service for customers to optimize the latency, performance and cost of their read workloads.

Cache 129

Cache Cloud Performance Retail 129

Smashing Magazine

JANUARY 16, 2023

Largest Contentful Paint (or LCP) is one of three metrics of the Core Web Vitals. These metrics are used by Google to evaluate the quality of user experience. All the explanations will be illustrated by an example that we will iterate on. For simplicity, we will only use the <img> tag in our examples. png 1800w".

Media 104

Media Mobile Website Metrics 104