Alex Russell

FEBRUARY 28, 2022

The chief effect of the architectural difference is to shift the distribution of latency within the loop. Herein lies the source of our collective anxiety about front-end architectures: traversing networks is always fraught, but the costs to deliver client-side logic to cushion users from variable network latency remain stubbornly high.

Performance 104

Performance Latency Architecture Network 104

Percona

MARCH 29, 2023

Snappy Data size: 14.95GB Data size after compression: 10.75GB Avg latency: 12.22ms Avg cpu usage: 34% Avg insert ops rate: 16K/s Time taken to import 120000000 document: 7292 seconds Zstd (with default compression level 6) Data size: 14.95GB Data size after compression: 7.69GB Avg latency: 12.52ms Avg cpu usage: 31.72% Avg insert ops rate: 14.8K/s

Storage 105

Storage Network Open Source Latency 105

The Netflix TechBlog

NOVEMBER 2, 2021

Perceptual quality measurements are used to drive video encoding optimizations , perform video codec comparisons , carry out A/B testing and optimize streaming QoE decisions to mention a few. This enables us to use our scale to increase throughput and reduce latencies. VQS is called using the measureQuality endpoint.

Media 171

Media Innovation Metrics Latency 171

IO River

NOVEMBER 2, 2023

‍What Comprises Video Streaming - Traffic CharacteristicsWith the emphasis on a high-quality streaming experience, the optimization starts from the very core. Fundamentally, internet traffic can be broadly categorized into static and dynamic content. Let’s analyze how you can achieve this win-win as effectively as possible!‍What

Architecture 52

Architecture Performance Internet Internet 52

IO River

NOVEMBER 2, 2023

What Comprises Video Streaming - Traffic CharacteristicsWith the emphasis on a high-quality streaming experience, the optimization starts from the very core. Fundamentally, internet traffic can be broadly categorized into static and dynamic content. Let’s analyze how you can achieve this win-win as effectively as possible!‍What

Architecture 52

Architecture Performance Internet Internet 52

KeyCDN

FEBRUARY 4, 2021

A quick way to fix this is simply by temporarily changing the TTL (time to live) setting for the DNS record, and route your traffic to the second DNS server until the outage is fixed. Using a fast DNS hosting provider ensures there is less latency between the DNS lookup and TTFB. Speed Speed also plays a role with DNS.

Cache 134

Cache Website Internet Internet 134

The Morning Paper

NOVEMBER 15, 2020

When used in prevention mode (IPS), this all has to happen inline over incoming traffic to block any traffic with suspicious signatures. This makes the whole system latency sensitive. The baseline for comparison is Snort 3.0 , “the most powerful IPS in the world” according to the Snort website.

Servers 128

Servers Hardware Latency Design 128

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. How long is each time call? us on Centos and 0.68

Speed 126

Speed Java AWS Virtualization 126

Smashing Magazine

AUGUST 10, 2023

In contrast, tools like DebugBear and WebPageTest use more realistic throttling that accurately reflects network round trips on a higher-latency connection. It’s another type of real-user monitoring takes real traffic from your site and sends the information over for extremely accurate results.

Speed 81

Speed Monitoring Testing Network 81

Alex Russell

MAY 9, 2022

This is a complex topic, but to borrow from a recent post , web performance expands access to information and services by reducing latency and variance across interactions in a session, with a particular focus on the tail of the distribution (P75+). Consistent performance matters just as much as low average latency.

Performance 86

Performance Latency Metrics Engineering 86

HammerDB

OCTOBER 23, 2023

With a simple example such as this, it would not necessarily be expected for the additional network traffic to be significant between the 2 approaches. Stored Procedures and Client SQL comparison To test the stored procedures and client implementations, we ran both workloads against a system equipped with Intel Xeon 8280L.

Benchmarking 62

Benchmarking Database Network C++ 62

CSS - Tricks

NOVEMBER 1, 2019

TTFB mobile speed distribution comparison between all web and CMS (CrUX, July 2019). And here are the FCP results: FCP mobile speed distribution comparison between all web and CMS (CrUX, July 2019). At least the FID results are a bit better: FID mobile speed distribution comparison between all web and CMS (CrUX, July 2019).

Speed 46

Speed Mobile Metrics Scalability 46

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. us on Centos and 0.68 us on Ubuntu. Ubuntu is 5x slower.

Speed 52

Speed Java AWS Virtualization 52

Testsigma

JANUARY 30, 2021

Test how user-friendly an application is: Google search engine gives high priority to websites in comparison to desktop apps. Testing helps in finding latency time of an application: Users prefer to use mobile phones over desktop when they are looking for any query, booking flight/movie ticket.

Mobile 52

Mobile Testing Website Internet 52

Highly Scalable

MAY 1, 2012

This approach often leads to heavyweight high-latency analytical processes and poor applicability to realtime use cases. There is a system that monitors traffic and counts unique visitors for different criteria (visited site, geography, etc.) A group of several such sketches can be used to process range query. Case Study. Case Study.

Analytics 191

Analytics Traffic Big Data Efficiency 191

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. us on Centos and 0.68 us on Ubuntu. Ubuntu is 5x slower.

Speed 40

Speed Java AWS Virtualization 40

Percona

MAY 2, 2023

Especially if going into or out of storage types that may throttle bandwidth/network traffic. Storage destination: Backups stored on the same disk as the database can impact read and write operations, while backups stored on a remote server can increase network traffic and cause latency.

Best Practices 52

Best Practices Database Storage Servers 52

Alex Russell

JULY 14, 2021

Meanwhile, on Android, the #2 and #3 sources of web traffic do not respect browser choice. On Android today and early iOS versions, WebViews allow embedders to observe and modify all network traffic (regardless of encryption). Users can have any browser with any engine they like, but it's unlikely to be used. How can that be?

Google 121

Google Mobile Engineering Internet 121

Smashing Magazine

JANUARY 11, 2021

Alternatively, you can also use: Addy Osmani’s Chrome UX Report Compare Tool , Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). CrUX generates an overview of performance distributions over time, with traffic collected from Google Chrome users.

Performance 145

Performance Cache Media Metrics 145

Brendan Gregg

SEPTEMBER 5, 2017

Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist. Tracing ZFS operation latency. Oracle have a similar useful page as well: the Linux to Oracle Solaris 11 comparison, as well as a [procedure] for migrating from Solaris to Linux. Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

Smashing Magazine

JANUARY 7, 2019

To get a good first impression of how your competitors perform, you can use Chrome UX Report ( CrUX , a ready-made RUM data set, video introduction by Ilya Grigorik), Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). Large preview ).

Performance 103

Performance Cache Metrics Network 103

Smashing Magazine

JANUARY 6, 2020

Alternatively, you can also use Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). Paddy Ganti’s script constructs two URLs (one normal and one blocking the ads), prompts the generation of a video comparison via WebPageTest and reports a delta.

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

AUGUST 22, 2021

Because we are dealing with network protocols here, we will mainly look at network aspects, of which two are most important: latency and bandwidth. Latency can be roughly defined as the time it takes to send a packet from point A (say, the client) to point B (the server). Two-way latency is often called round-trip time (RTT).

Performance 105

Performance Network Latency Servers 105

Smashing Magazine

AUGUST 9, 2021

You’ve probably heard things like: “HTTP/3 is much faster than HTTP/2 when there is packet loss”, or “HTTP/3 connections have less latency and take less time to set up”, and probably “HTTP/3 can send data more quickly and can send more resources in parallel”. HTTP/2 versus HTTP/3 protocol stack comparison ( Large preview ).

Transportation 145

Transportation Internet Internet Network 145

Smashing Magazine

SEPTEMBER 6, 2021

Finally, not inlining resources has an added latency cost because the file needs to be requested. Note that there is an Apache Traffic Server implementation, though.). Traffic for one connection must, of course, always be routed to the same back-end server (the others wouldn’t know what to do with it!).

Network 104

Network Servers Cache Traffic 104