The Netflix TechBlog

OCTOBER 16, 2019

Often the data is held in memory by consumers and used as a “total cache”, where it is accessed at runtime by client code and atomically swapped out under the hood. for example Open Connect Appliance cache configuration, supported device type IDs, supported payment method metadata, and A/B test configuration.

Cache 191

Cache Architecture Metrics Java 191

The Netflix TechBlog

JULY 1, 2019

Development As part of developing this type of UI experience on any platform, we knew we would need to think about creating smooth, performant animations with a balance between quality and download size for the images and video previews, all without degrading the performance of the app. images no longer in the viewport).

Cache 167

Cache Design Testing Development 167

Dynatrace

AUGUST 12, 2019

For each statement, we provide you with 14 metrics. Download the execution plan to analyze it. Oracle performance metrics. From the hundreds of available Oracle performance metrics, we’ve selected those that matter most. All metrics, including those related to queries, can be charted using custom charts.

Database 170

Database Metrics Cache Servers 170

Smashing Magazine

NOVEMBER 22, 2021

Better tooling and metrics standardization. Moreover, the industry has primarily standardized on Google’s Core Web Vitals (CWV) performance metrics, and monitoring them is now integrated into services such as the Google Search Console. But which metrics should be measured in order to determine website performance?

Website 141

Website Performance Google Website Performance 141

The Netflix TechBlog

MARCH 7, 2024

Once we have discovered the Parquet files to be processed, MetaflowDataFrame takes over: it downloads data using Metaflow’s high-throughput S3 client directly to the process’ memory, which often outperforms reading of local files. Recently, we added support for the write path, so tables can be updated as well using the library.

Systems 235

Systems Media Cache Open Source 235

Smashing Magazine

MARCH 6, 2025

The Four LCP Subparts LCP subparts split the Largest Contentful Paint metric into four different components: Time to First Byte (TTFB) : How quickly the server responds to the document request. Resource Load Delay : Time spent before the LCP image starts to download. Resource Load Time : Time spent downloading the LCP image.

Website 59

Website Google Speed Metrics 59

Smashing Magazine

MAY 12, 2022

One of the costs that Noam mentions is the increased download size, especially JavaScript bundle sizes, that stem from the use of frameworks and other libraries. In particular, the increase in the amount of downloaded JavaScript can have a direct impact on website performance. Analyzing Per Metric. Large preview ).

Google 136

Google Performance Website Mobile 136

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. Resource Download Time.

Metrics 74

Metrics Social Media Performance Speed 74

Speed Curve

FEBRUARY 10, 2025

Have you ever looked at the page speed metrics – such as Start Render and Largest Contentful Paint – for your site in both your synthetic and real user monitoring tools and wondered "Why are these numbers so different?" And as the graph below shows, even some urban centres can suffer download speeds as low as 20 Mbps.

Hardware 52

Hardware Internet Internet Speed 52

Percona

MAY 10, 2023

If you only have access to Linux metrics, look at the “b” column in vmstat, which corresponds to processes blocked on disk I/O. Download Percona Monitoring and Management Today First, look at application-specific observability.

Cache 145

Cache Monitoring Open Source Processing 145

Percona

JUNE 22, 2023

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. query cache: Disable (query_cache_size: 0, query_cache_type:OFF) innodb_adaptive_hash_index: Check adaptive hash index usage to determine its efficiency.

Performance 136

Performance Monitoring Traffic Database 136

Percona

APRIL 7, 2023

But since retrieving data from disk is slow, databases tend to work with a caching mechanism to keep as much hot data, the bits and pieces that are most often accessed, in memory. In MySQL, considering the standard storage engine, InnoDB , the data cache is called Buffer Pool. In PostgreSQL, it is called shared buffers.

Tuning 145

Tuning Cache Servers Benchmarking 145

CSS - Tricks

APRIL 1, 2021

Site performance is potentially the most important metric. seconds faster on average and it drove 60 million more Firefox downloads per year. Having a slow site might leave you on page 452 of search results, regardless of any other metric. billion if the site slowed down by just one second.

Cache 94

Cache Social Media Media Website 94

Smashing Magazine

JULY 29, 2019

South Korea has the fastest mobile download speed , averaging 52.4 Mbps download and 0.7 The USA ranks 40th in the world for mobile download speeds, at around 34 Mbps, and is at risk of falling further behind as the world moves towards 5G. For reference, the metric is $1.19 Mbps, but Iraq has the slowest, averaging 1.6

Cache 99

Cache Mobile Google Network 99

Smashing Magazine

JUNE 8, 2021

Image optimization , loading behavior and rendering in the browser require understanding of image formats and image compression techniques, image decoding and browser rendering, image CDNs and adaptive media loading, not to mention effective caching and preloading. Jump to the details ↓ Download a free PDF sample (12MB).

Media 124

Media Cache Google Best Practices 124

KeyCDN

AUGUST 29, 2019

While these metrics can be very helpful it is also important to keep this data in perspective. However, as mentioned in the section below, don’t base your efforts solely off of the PageSpeed Insights metrics. Don’t Obsess Over the 100/100 Metric A lot of people try and strive for that 100/100 score on Google PageSpeed Insights.

Google 103

Google Cache Speed Analytics 103

Percona

NOVEMBER 9, 2023

In this blog post, we will discuss how to extend Percona Monitoring and Management (PMM) to get PostgreSQL metrics on checkpointing activity, internal buffers, and WAL usage. With this data, we’ll be able to better understand and tune our Postgres servers. You can search the blog for more information on this if needed.

Monitoring 125

Monitoring Tuning Metrics Servers 125

Smashing Magazine

MAY 16, 2022

The header is constructed via a name with an optional description and/or metric value. Web browsers expose a global Performance Timeline API to inspect details about specific metrics/events that have happened during the page lifecycle. For example, we almost always trigger image downloads by putting an img element in our HTML.

Servers 111

Servers Monitoring Cache Network 111

Percona

AUGUST 8, 2023

Global caches like the InnoDB buffer pool and MyISAM key cache and session-level caches like the sort buffer, join buffer, random read buffer, etc. Global memory caches are static in size as they are defined solely by the configuration of the database itself. Do these queries use more caches?

Traffic 98

Traffic Cache Monitoring Database 98

Dotcom-Montior

AUGUST 5, 2020

including DNS, Connection, SSL, Request, First packet, and Download. As your speed test results will probably show, most of the time spent loading your page is for downloading images and initializing JavaScript. Browser Caching: Although it may seem commonplace, caching is sometimes overlooked. Optimize Your Pages.

Website 92

Website Speed Cache Traffic 92

Smashing Magazine

APRIL 28, 2021

Image optimization , loading behavior and rendering in the browser require understanding of image formats and image compression techniques, image decoding and browser rendering, image CDNs and adaptive media loading, not to mention effective caching and preloading. Jump to the details ↓ Download a free PDF sample (12MB).

Media 105

Media Cache Google Best Practices 105

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 78

Performance Cache Traffic Metrics 78

Smashing Magazine

APRIL 29, 2021

Largest Contentful Paint (LCP) is a Core Web Vitals metric that measures when the largest contentful element (images, text) in a user’s viewport, such as one of these images, becomes visible. Cumulative Layout Shift (CLS, a Core Web Vitals metric) measures the instability of content. Lighthouse. Large preview ). Large preview ).

Media 145

Media Network Metrics Mobile 145

Smashing Magazine

NOVEMBER 17, 2022

Web performance refers to the speed at which a website loads, how fast it’s downloaded, and how an app is displayed on the user’s browser. Key user-centric metrics often depend on the size, number, layout, and loading priority of images on the page. The Benefits Of Using An Image Service CDN. Conclusion. What Is Web Performance?

Media 125

Media Cache Website Mobile 125

MachMetrics

FEBRUARY 22, 2019

It’s one of the most frequently asked questions I see asked, “I’ve tested my site speed, so now what do these metrics mean?” Here we’ll explain what each of the common web performance metrics mean, and how can you use that data to optimize your site and make it faster. Standard Website Speed Metrics.

Speed 56

Speed Metrics Website Cache 56

Smashing Magazine

MAY 17, 2021

There are three Core Web Vitals metrics that Google will use to help rank sites in their upcoming search algorithm update. Chrome is set up to track these metrics across all logged-in Chrome users, and sends anonymous statistics summarizing a customer’s experience on a site back to Google for evaluation. Large preview ).

Google 111

Google Analytics Serverless Metrics 111

Smashing Magazine

JUNE 2, 2021

And while you can usually cache the full page of an article, the same is not true of many shop pages and elements. Some are user-specific, like the shopping cart in the header or the wish list, and due to the personal nature of the data, they should never be cached. But even in the planning phases, traps await. Legacy Support.

Performance 132

Performance Cache Website Mobile 132

Tim Kadlec

MARCH 19, 2018

How well does AMP perform when the library is served using the AMP cache? If you do end up clicking on that AMP page, it’s already been downloaded in the background and as a result, it displays right away. Perhaps the AMP cache will provide a bit of a boost. Let’s see if the Google cache puts it over the top.

Cache 79

Cache Google Speed Metrics 79

SQL Performance

MARCH 30, 2021

I used the public Stack Overflow 2013 database ( download details ). It can be downloaded at the same link. Running a parallel plan on a single thread can also happen when a cached parallel plan is reused by a session that is limited to DOP 1 by an environmental setting (e.g. ( PostTypeId ASC , CreationDate ASC. )

Cache 98

Cache Servers Processing Operating System 98

Smashing Magazine

JUNE 1, 2022

Researchers and major companies have been publishing case studies for years , proving that slower page load experiences impact business metrics, including conversion rate, revenue, bounce rate, and more. Poor performance of third-party services can have other business impacts even if your website does not use advertising.

Website 138

Website Design Network Testing 138

CSS - Tricks

MARCH 2, 2022

And not just defining it in terms of specific metrics (even that is tricky), but answer questions like: What are this discipline’s guiding principles? Caching Header Best Practices — Simon Hearne’s dissertation on Cache headers. What does it look like to practice web performance? How do we do it?

Performance 71

Performance Cache Best Practices Strategy 71

HammerDB

JUNE 27, 2022

HammerDB maintains a web page under the stats link where the number of downloads can be tracked. The NOPM Metric. When reporting TPROC-C workloads the key metric is known as NOPM or New Orders per Minute. Cached vs Scaled Workloads. Instead, most users prefer to implement a cached workload.

Benchmarking 63

Benchmarking Open Source C++ Cache 63

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 73

Google Engineering Speed Mobile 73

Smashing Magazine

MARCH 6, 2025

The Four LCP Subparts LCP subparts split the Largest Contentful Paint metric into four different components: Time to First Byte (TTFB) : How quickly the server responds to the document request. Resource Load Delay : Time spent before the LCP image starts to download. Resource Load Time : Time spent downloading the LCP image.

Website 62

Website Google Speed Metrics 62

Smashing Magazine

NOVEMBER 2, 2021

PWAs have been around for over five years, yet native applications outnumber them both in the quantity ratio and how many times users download them. Moreover, Garten-und-Freizeit, a German e-commerce store that sells furniture, saw an amazing improvement in their metrics after getting a PWA. Image credit: Garten-und-Freizeit.

Code 90

Code Cache Mobile Retail 90

Smashing Magazine

AUGUST 9, 2021

As a second example, TCP sees all of the data it transports as a single “file” or byte stream , even if we’re actually using it to transfer several files at the same time (for example, when downloading a web page consisting of many resources). Connections are then reused to download a new file once the previous has fully transferred.

Transportation 145

Transportation Internet Internet Network 145

Smashing Magazine

APRIL 11, 2022

Loading experience is crucial to the user’s first impression and overall usability, so Google defined Largest Contentful Paint (LCP) metric to measure how quickly the main content loads and is displayed to the user. Let’s focus on how these resources are requested and downloaded. Without priority hints. Large preview ).

Media 78

Media Tuning Metrics Google 78