The Netflix TechBlog

SEPTEMBER 8, 2020

Over the course of this post, we will talk about our approach to this migration, the strategies that we employed, and the tools we built to support this. 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.

Latency 233

Latency Cache Java Traffic 233

The Morning Paper

OCTOBER 18, 2020

Radix Sort is carefully designed to make effective use of the L2 cache and sequential memory accesses, whereas Learned Sort is making random accesses all over the destination array. How can learned sort be adapted to make it cache-efficient? If it’s high performance you’re after, you can’t ignore mechanical sympathy.

Cache 137

Cache C++ Java Tuning 137

Brendan Gregg

APRIL 14, 2022

I've also used and helped develop many other technologies for debugging, primarily perf, Ftrace, eBPF (bcc and bpftrace), PMCs, MSRs, Intel vTune, and of course, [flame graphs] and [heat maps]. This diverse environment has always provided me with interesting things to explore, to understand, analyze, debug, and improve.

Java 145

Java Cloud Cache AWS 145

Sutter's Mill

JUNE 10, 2010

I forgot to blog about this until now because of focusing on the Effective Concurrency course in Stockholm a few weeks ago, but to answer those who wonder if I’ll be giving it again in North America too: Yes, I’m also giving the public Effective Concurrency course again at the end of this month at the Construx facility in Bellevue, WA, USA.

Best Practices 40

Best Practices Scalability Cache Architecture 40

Percona

JANUARY 9, 2023

NOTE : All tests were applied for MySQL version 8.0.30, and in the background, I ran every query three to five times to make sure that all of them were fully cached in the buffer pool (for InnoDB) or by the filesystem (for MyISAM). But why we can’t just cache the actual number of the rows? sec) What flash speed we saw there!

Cache 80

Cache Engineering Storage Speed 80

High Scalability

NOVEMBER 2, 2018

And, of course, Satoshi proposing Bitcoin, 10 years ago today. Then please recommend my well reviewed (30 reviews on Amazon and 72 on Goodreads!) book: Explain the Cloud Like I'm 10. They'll love it and you'll be their hero forever. $10 Some favorites…2/ Tim Berners Lee, proposing the World Wide Web in 1991.3/

Internet 126

Internet Internet Scalability Azure 126

Smashing Magazine

SEPTEMBER 2, 2021

Knights of the Flexbox Table is another well-designed interactive course to help you learn the different aspects of the flexbox specification. This course is unique because you’re not writing pure CSS, but instead, you’re using Tailwind CSS classes, which means you’ll learn flexbox along with the syntax for Tailwind utility classes.

Development 145

Development Games Education Programming 145

Dynatrace

JUNE 16, 2020

In that way, you could try to cache requests so that not every request hits the mainframe. Once you have completed the multidimensional analysis, you’ll of course want to monitor key metrics on a dashboard, detect trends, and get alerts when anomalies are discovered.

Innovation 152

Innovation Metrics Infrastructure Programming 152

Percona

MAY 1, 2023

Connection pooling: Minimizing connection overhead and improving response times for frequently accessed data by implementing mechanisms for connection pooling and caching strategies. This parameter sets how much dedicated memory will be used by PostgreSQL for the cache. However, the problem is not always the database itself!

Tuning 52

Tuning Efficiency Database Performance 52

MachMetrics

DECEMBER 20, 2018

Did you order a 5 course meal, but then only eat 2 of them? Of course not, that would be a waste. Now let’s upload our lazy-loading updates and try again: (Note that you’ll have to do hard-reload, clear cache, or use a new private browser to ensure we’re not taking advantage of the browser cache in our testing).

Cache 75

Cache Speed Internet Internet 75

Randon ASCII

SEPTEMBER 8, 2019

The fact that this shows up as CPU time suggests that the reads were all hitting in the system cache and the CPU time was the kernel overhead (note ntoskrnl.exe on the first sampled call stack) of grabbing data from the cache. This means that there is no caching between RuntimeBroker.exe and this file.

Latency 79

Latency Cache Programming Operating System 79

Smashing Magazine

MARCH 19, 2021

Gael Metais suggested to more aggressively subset web fonts and look into caching issues with our AVIF files. If a browser doesn’t support AVIF, it gets a JPEG file (properly cached), The content negotiation happens via <picture> + srcset in the browser. The next day we subset the fonts and pushed them live.

Mobile 140

Mobile Design Cache Code 140

Smashing Magazine

SEPTEMBER 20, 2021

And of course, scrapers could scrape your site to look for security vulnerabilities or exposed contact or sales lead details. Search Engine And Web Archive Cached Results. Another common category of imposter domains are domains used by search engines for delivering cached results or archived versions of page views. Ad Scraping.

Website 89

Website Analytics Google Cache 89

Brendan Gregg

APRIL 14, 2022

I've also used and helped develop many other technologies for debugging, primarily perf, Ftrace, eBPF (bcc and bpftrace), PMCs, MSRs, Intel vTune, and of course, flame graphs and heat maps. This diverse environment has always provided me with interesting things to explore, to understand, analyze, debug, and improve.

Java 52

Java Cache Cloud AWS 52

The Morning Paper

FEBRUARY 23, 2020

Caching of query results on the other hand, looks like a good business model, at large enough scale these might amount to pretty much the same thing). " And the answer of course, is the by now familiar move of keeping most of this off of the blockchain using off-chain protocols ( state channels ).

Blockchain 94

Blockchain Internet Internet IoT 94

Smashing Magazine

SEPTEMBER 9, 2021

The solution used in Scrapbook was to use the SWR library of React hooks to update the cached page from the server with client side data fetching. The client is first served the cached statically generated page (generated with getStaticProps() ), in the background the server also begins the process of revalidating that page (read more here ).

Cache 102

Cache Internet Internet Servers 102

Speed Curve

JUNE 14, 2021

To overcome some of these challenges, we built our own Java-based player, complete with caching, content compression, and even bandwidth detection so it could switch between video, audio, and text versions of a course depending on network speed. And, of course, what can actually be done to make a site faster?

Retail 52

Retail Internet Internet Education 52

The Morning Paper

JUNE 16, 2019

The challenging thing of course, is efficiently maintaining all of these parallel universes. The amount of computation required on a base update can be reduced by sharing computation and cached data between universes. Thus an application can issue any query, and we can rest safe in the knowledge that it will only see permitted data.

Database 90

Database Cache Benchmarking Efficiency 90

Percona

AUGUST 31, 2018

This parameter sets how much dedicated memory will be used by PostgreSQL for cache. If your working set of data can easily fit into your RAM, then you might want to increase the shared_buffer value to contain your entire database, so that the whole working set of data can reside in cache. wal_buffers. effective_cache_size.

Tuning 58

Tuning Database Performance Benchmarking 58

The Morning Paper

DECEMBER 1, 2019

Memory might be durable, but… …it is expected that caches and registers will remain volatile. That means of course that we have to have a way to recover the control plane structure after a crash, and we’ll be trading off slightly longer recovery times while we recreate it, for faster operation in the normal case.

Efficiency 60

Efficiency Cache C++ Performance 60

The Morning Paper

SEPTEMBER 24, 2019

This, of course, positions privacy as a luxury good… Finding apps that leak data. Other apps access the router mac address either by reading the ARP cache (opening the file /proc/net/arp and reading its content) or by simply requesting the igd.xml (Internet gateway device configuration file) directly from the router itself.

Systems 74

Systems Traffic Network Google 74

MachMetrics

FEBRUARY 27, 2020

It offers audits for best practices, accessibility, progressive web apps, SEO and of course, performance. The Best Practices audit will run checks for things like SSL certificates (HTTPS), caching, and outbound link safety. While PageSpeed Insights focuses solely on speed/performance, Lighthouse offers even more. Best Practices.

Google 82

Google Speed Testing Tools Testing 82

MachMetrics

JUNE 1, 2020

Of course not. This can be done by implementing browser caching, combining JavaScript and CSS files, and minimizing redirects. The point is there are tons of visitors who are going to come to your site who won’t be on an ultra-fast connection. Do you want to alienate everyone who comes to you on anything less than 4G LTE?

Speed 67

Speed Mobile Testing Google 67

Randon ASCII

OCTOBER 15, 2018

And, of course, this post will also cover how to detect and avoid this problem. A long-standing correctness bug in the Windows file cache: Compiler bug? This is a CPU bound problem because all of the relevant disk data is cached. Unplanned serialization that lead to full-system UI hangs: 24-core CPU and I can’t move my mouse.

Processing 57

Processing Cache Programming Virtualization 57

KeyCDN

SEPTEMBER 12, 2019

The file size of your images of course is very important, but SEO and social media also play an important part in helping your website perform and convert better. KeyCDN’s Cache Enabler plugin is fully compatible the HTML attributes that make images responsive. jpg 480 KB 407 KB 43 KB 89% jpg-to-webp-2.jpg

Social Media 106

Social Media Media Google Website 106

ACM Sigarch

FEBRUARY 23, 2018

Architects were always aware of the impact speculative execution has on the performance of microarchitectural structures from branch predictors to caches. I recall heated discussions 20+ years ago on whether speculative data in caches improves or degrades cache performance.

Architecture 47

Architecture Cache Hardware Virtualization 47

MachMetrics

JULY 31, 2020

Many caching plugins like WPRocket also offer Gzip compression right out of the box. The best course of action is to pre compress your files and serve them alongside your regular files. For our WordPress readers out there, the above methods will still work for you as well! How Do I Implement Brotli? This can be pretty CPU intensive.

Speed 67

Speed Servers Google Tuning 67

SQL Performance

OCTOBER 20, 2022

This is true, of course, but there’s a bit more to say. The test procedure includes extra statements to prevent plan caching in another attempt to make the tests more repeatable. With caching, an extra intent-share object lock can be acquired on the dropped test table during the schema-changed recompilation process.

Testing 91

Testing Servers Cache Engineering 91

Brendan Gregg

MARCH 16, 2024

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. It shouldn't be 10%, unless it's cache effects. But I'd rather the cost be zero, of course!

Java 145

Java Cache Google Hardware 145

The Morning Paper

OCTOBER 6, 2019

Booking.com go to some lengths to minimise the latency introduced by models, including horizontally scaled distributed copies of models, a in-house developed custom linear prediction engine, favouring models with fewer parameters, batching requests, and pre-computation and/or caching. Lesson 5: get early feedback on model quality.

Latency 102

Latency Metrics Cache Design 102

Smashing Magazine

JANUARY 15, 2019

I, for one, have typically added Google Analytics to every site I manage as a matter of course. I predominantly use Nginx, and I have a particular fondness for FastCGI cache and have found it to be especially efficient. A particular favorite in the WordPress space is WP Super Cache. We should use HTTP2 over HTTPS.

Website Performance 73

Website Performance Website Energy Performance 73

The Symphonia

MAY 22, 2018

Of course publishing it on Martin Fowler’s site was always going to get it to a wider audience (thanks Martin!), Because of course it did. Finally, of course, there’s the community section. I thought a few folks might be interested. but I didn’t realize quite how wide. I rewrote the “ State ” section?—?I

Serverless 40

Serverless Architecture Lambda Azure 40

The Symphonia

JANUARY 21, 2019

We even put CI/CD front and center in our training courses ?—?we You can use various different sizes of build host (small, medium, large); you can use one of the predefined images as your build environment, or you can define your own docker image to use; and you can, if you want, cache data across build runs.

AWS 40

AWS Open Source Lambda Serverless 40

Percona

APRIL 24, 2023

The more indexes, the more the requirement of memory for effective caching. Indexes need more cache than tables Due to random writes and reads, indexes need more pages to be in the cache. Cache requirements for indexes are generally much higher than associated tables. Learn more about Percona Training

Tuning 130

Tuning Cache Storage Database 130

All Things Distributed

AUGUST 17, 2011

Of course the easiest would have been to just install Wordpress on a Amazon EC2 micro instance and use a plugin to convert wordpress php to static pages and then sync that to S3. My templates and blog posts are now located in DropBox and thus locally cached at each machine I use. at 30,000 feet).

Servers 126

Servers Social Media AWS Website 126

Percona

MAY 10, 2023

In reality, though, of course, nothing changed for our first workload — it continues to be I/O-bound; it just became invisible when we look at “IOWait”! IOWait is completely gone and now this system does not look I/O-bound at all!

Cache 144

Cache Monitoring Open Source Processing 144

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. The main minus of parameter embedding optimization is you don’t get efficient plan caching and reuse behavior like you do for parameterized plans. plan_handle , Q. SELECT TOP (@n).WHERE

Cache 144

Cache Strategy C++ Code 144