Brendan Gregg

AUGUST 29, 2021

Reads usually have apps waiting on them; writes may not (write-back caching). biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. total used free shared buff/cache available Mem: 64414 15421 349 5 48643 48409 Swap: 0 0 0. This is a 64-Gbyte memory system, and 48 Gbytes is in the page cache.

Cache 78

Cache C++ AWS Java 78

Smashing Magazine

APRIL 17, 2019

2019-04-17T12:30:16+02:00. 2019-04-29T18:34:58+00:00. The browser caches the results of these lookups, but they can be slow. This typically happens once per server and takes up valuable time — especially if the server is very distant from the browser and network latency is high. Drew McLellan. The as Attribute.

Performance 107

Performance Servers Games Cache 107

KeyCDN

SEPTEMBER 12, 2019

Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 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.

Social Media 106

Social Media Media Google Website 106

KeyCDN

JANUARY 31, 2019

The next closest active POP location to Bucharest was Istanbul which was still almost 900km away; this distance adds up in terms of latency. Before the implementation of our Bucharest POP, Romanian users were delivered content from our surrounding KeyCDN POPs.

Internet 48

Internet Internet Ecommerce Speed 48

SQL Performance

APRIL 27, 2020

Hyperscale achieves high performance from each compute node having SSD-based caches which helps minimize the network round trips to fetch data. There is a lot of awesome technology involved with Hyperscale in how it is architected to use SSD-based caches and page servers. Azure SQL Managed Instance Performance Considerations.

Azure 55

Azure Database Serverless Hardware 55

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

Rigor

JULY 2, 2019

Because HTTP redirection is handled server-side, it is typically faster than client-side redirection, especially if the browser can cache the new location of the requested file. Originally published September 2016, updated July 2019. Using JavaScript Redirection. Keep in mind that all of these methods add time to your page loads.

Mobile 60

Mobile Traffic Google Latency 60

SQL Performance

APRIL 8, 2019

The L3 cache size is 64MB. The L3 cache size is 64MB. They feature low latency, local NVMe storage that can directly leverage the 128 PCIe 3.0 On March 25, 2019, Microsoft announced the availability of higher performance, larger capacity managed disks for Azure VMs. lanes for I/O connectivity. Azure Lsv2 Details.

Azure 42

Azure Virtualization Storage Benchmarking 42

The Morning Paper

DECEMBER 10, 2019

HotStorage 2019. At 0.4ns, we’re in the same ballpark as regular L1 cache reference latency. A tale of two abstractions: the case for object space , Bittman et al., That makes sense, because the test ‘repeatedly deferenced a persistent pointer,’ so we’d expect everything to be in L1. The last word.

Hardware 52

Hardware Virtualization Operating System Programming 52

Brendan Gregg

AUGUST 29, 2021

Reads usually have apps waiting on them; writes may not (write-back caching). biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. This is a 64-Gbyte memory system, and 48 Gbytes is in the page cache (the file system cache). This shows many cache misses, with a hit ratio varying between 6.5

Cache 40

Cache C++ AWS Systems 40

Enprowess

SEPTEMBER 7, 2021

with its low latency I/O operations, gives the benefit of ‘No buffering’ to developers. 12.9.0 – August 20, 2019; 16.8.6 – May 6, 2019. Caching of individual modules. Scalability: Applications developed with Node.js can be scaled vertically and horizontally to improve their performance. Network: Node.js

Open Source 52

Open Source Virtualization Programming Servers 52

CSS Wizardry

MARCH 3, 2019

To this end, having a solid caching strategy can make all the difference for your visitors. ?? How is your knowledge of caching and Cache-Control headers? — Harry Roberts (@csswizardry) 3 March, 2019. Cache-Control. The amount of control we’re granted makes for very intricate and powerful caching strategies.

Cache 266

Cache Latency Strategy Servers 266

The Morning Paper

SEPTEMBER 12, 2019

The Apache MADLib project is still going strong, and the recent (July 2019) 1.16 A pipeline breaker occurs when the output of one operator must be materialized to disk or transferred over the network, as opposed to being directly communicated from operator to operator via CPU cache, or, in the worst case, via RAM.

Network 44

Network Database Programming Hardware 44

KeyCDN

JULY 11, 2019

Using an image CDN, such as KeyCDN, can significantly reduce the latency of your image delivery. Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 width=600&quality=70 Combine this with our WebP caching to automatically deliver the highest performing image format.

Speed 52

Speed Website Mobile Latency 52

Smashing Magazine

JANUARY 7, 2019

Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. 2019-01-07T12:00:13+00:00. 2019-04-29T18:34:58+00:00. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. Vitaly Friedman.

Performance 105

Performance Cache Metrics Network 105

Smashing Magazine

JANUARY 6, 2020

Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. Designed for the modern web, it responds to actual congestion, rather than packet loss like TCP does, it is significantly faster , with higher throughput and lower latency — and the algorithm works differently.

Performance 112

Performance Cache Network Servers 112

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