Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 Reads usually have apps waiting on them; writes may not (write-back caching). This is "cache busting." 17 48011 [.]

Cache 40

Cache C++ AWS Systems 40

ACM Sigarch

MARCH 18, 2019

How many buffers are needed to track pending requests as a function of needed bandwidth and expected latency? Can one both minimize latency and maximize throughput for unscheduled work? These models are useful for insight regarding the basic computer system performance metrics of latency and throughput (bandwidth). Little’s Law.

Systems 60

Systems Latency Performance Analytics 60

ACM Sigarch

MARCH 25, 2019

How many buffers are needed to track pending requests as a function of needed bandwidth and expected latency? Can one both minimize latency and maximize throughput for unscheduled work? The M/M/1 queue will show us a required trade-off among (a) allowing unscheduled task arrivals, (b) minimizing latency, and (c) maximizing throughput.

Systems 53

Systems Latency Performance C++ 53

KeyCDN

OCTOBER 24, 2018

Although both countries are relatively close to one another, they are separated by a distance of approximately 500km, which adds up in terms of latency. As of August 2018, Helsinki alone had a population of almost 650,000 people. As for Finland, it covers an area of over 338,000 square kilometers and has a population of over 5.5

Internet 48

Internet Internet Speed Network 48

Dean Hume

APRIL 24, 2018

Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user. They allow you to cache resources on the user's device when they visit your site for the first time. CPU Utilization and Power Consumption (Source: Blackburn 2008).

Energy 40

Energy Cache Traffic Website 40

Dean Hume

APRIL 24, 2018

Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user. They allow you to cache resources on the user's device when they visit your site for the first time. CPU Utilization and Power Consumption (Source: Blackburn 2008).

Energy 40

Energy Cache Traffic Website 40

Dean Hume

APRIL 24, 2018

Without effective caching on the client, the server will see an increase in workload, more CPU usage and ultimately increased latency for the end user. They allow you to cache resources on the user's device when they visit your site for the first time. CPU Utilization and Power Consumption (Source: Blackburn 2008).

Energy 40

Energy Cache Traffic Website 40

KeyCDN

SEPTEMBER 12, 2019

KeyCDN’s Cache Enabler plugin is fully compatible the HTML attributes that make images responsive. The main reason is because it decreases the latency to the user where they are located by serving your images from a POP physically closest to them. The Cache Enabler plugin then delivers WebP images based to supported browsers.

Social Media 106

Social Media Media Google Website 106

Percona

AUGUST 10, 2018

sec < 2018-08-06 07:22:35.199 EDT > LOG: automatic analyze of table "vactest.scott.employee" system usage: CPU 0.00s/0.02u sec elapsed 0.15 sec < 2018-08-06 07:22:35.199 EDT > LOG: automatic analyze of table "vactest.scott.employee" system usage: CPU 0.00s/0.02u sec elapsed 0.15 1 second = 1000 milliseconds).

Tuning 44

Tuning Cache Database Storage 44

High Scalability

JULY 20, 2018

That means multiple data indirections mean multiple cache misses. Mark LaPedus : MRAM, a next-generation memory type, is being touted as a replacement for embedded flash and cache applications. Cliff Click : The JVM is very good at eliminating the cost of code abstraction, but not the cost of data abstraction. They are very expensive.

Internet 121

Internet Internet Scalability Automotive 121

CSS - Tricks

APRIL 1, 2021

Google’s industry benchmarks from 2018 also provide a striking breakdown of how each second of loading affects bounce rates. Source: Google /SOASTA Research, 2018. I’m going to update my referenced URL to the new site to help decrease latency that adds drag to the initial page load. Compressing, minifying and caching assets.

Cache 92

Cache Social Media Media Website 92

Abhishek Tiwari

DECEMBER 27, 2017

There are several emerging data trends that will define the future of ETL in 2018. In 2018, we anticipate that ETL will either lose relevance or the ETL process will disintegrate and be consumed by new data architectures. In contrast, Alluxio a middleware for data access - think Alluxio storage layer as fast cache.

Big Data 49

Big Data Artificial Intelligence Storage Hardware 49

Smashing Magazine

OCTOBER 31, 2023

The truth is that the two tools were fairly distinct until PSI was updated in 2018 to use Lighthouse reporting. INP is a measure of the latency for all interactions on a given page, where the highest latency — or close to it — informs the final score. It’s right there in the name!

Speed 97

Speed Google Website Metrics 97

KeyCDN

MARCH 10, 2021

The image below shows a significant drop in latency once we've launched the new point of presence in Israel. In fact, latency has been reduced by almost 50%! With a total of 5 POPs in Oceania, this continent benefits from lower latency with every POP added. With a population of 2.5 What's next?

Latency 110

Latency Internet Internet Tuning 110

Alex Russell

APRIL 29, 2021

After years of standards discussion and the first delivered to other platforms in 2018, iOS 14.5 April 2018 , but not usable until several releases later). For heavily latency-sensitive use-cases like WebXR, this is a critical component in delivering a good experience. finally shipped Audio Worklets this week. Pointer Lock.

Media 145

Media Games Education Engineering 145

HammerDB

NOVEMBER 5, 2018

Additionally for the log disk component it is latency for an individual write that is crucial rather than the total I/O bandwidth. To illustrate the data reads on Oracle we can flush the buffer cache. Consequently we now need to increase the buffer cache in size if we are to see more CPU activity. so what are your options?

Benchmarking 40

Benchmarking Database C++ Virtualization 40

The Netflix TechBlog

DECEMBER 17, 2019

This way, log event processing can resume event-by-event afterwards, eventually discovering the watermarks, without ever needing to cache log event entries. Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low.

Database 197

Database Traffic Transportation Open Source 197

The Netflix TechBlog

DECEMBER 17, 2019

This way, log event processing can resume event-by-event afterwards, eventually discovering the watermarks, without ever needing to cache log event entries. Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low.

Database 212

Database Traffic Transportation Open Source 212

Alex Russell

MARCH 6, 2021

A then-representative $200USD device had 4-8 slow (in-order, low-cache) cores, ~2GiB of RAM, and relatively slow MLC NAND flash storage. India became a 4G-centric market sometime in 2018. Sadly, data on latency is harder to get, even from Google's perch, so progress there is somewhat more difficult to judge.

Performance 124

Performance Network Cache Metrics 124

Alex Russell

OCTOBER 22, 2017

It simulates a link with a 400ms RTT and 400-600Kbps of throughput (plus latency variability and simulated packet loss). Simulated packet loss and variable latency, however, can make benchmarking extremely difficult and slow. Our baseline, then, should probably trade lower throughput/higher-latency for packet loss.

Performance 68

Performance Benchmarking Network Mobile 68

Smashing Magazine

SEPTEMBER 6, 2021

This approach was touted to be better for fine-grained caching because each subresource could be cached individually and the full bundle didn’t need to be redownloaded if one of them changed. Finally, not inlining resources has an added latency cost because the file needs to be requested. Large preview ). What Does It All Mean?

Network 104

Network Servers Cache Traffic 104

Smashing Magazine

JANUARY 11, 2021

Build Optimizations JavaScript modules, module/nomodule pattern, tree-shaking, code-splitting, scope-hoisting, Webpack, differential serving, web worker, WebAssembly, JavaScript bundles, React, SPA, partial hydration, import on interaction, 3rd-parties, cache. This improves page load time and caching during navigations.

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

Globally in 2018–2019, according to the IDC, 87% of all shipped mobile phones are Android devices. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. So additionally conducting research on common devices in your target group might be a good idea.

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 7, 2019

Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. PRPL stands for Pushing critical resource, Rendering initial route, Pre-caching remaining routes and Lazy-loading remaining routes on demand. In 2018, the Alliance of Open Media has released a new promising video format called AV1.

Performance 103

Performance Cache Metrics Network 103