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5G Will Definitely Make the Web Slower, Maybe

CSS - Tricks

as it matures 5G is predicted to improve network speeds dramatically. Carriers are predicting download speeds in 2019 for anywhere from 100Mb to 1 Gbit per second on average. But Scott continues: Faster networks should fix our performance problems, but so far, they have had an interesting if unintentional impact on the web.

Network 84
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7 Best Performance Testing Tools to Look Out for in 2021

DZone

Performances testing helps establish the scalability, stability, and speed of the software application. Confirming scalability, dependability, stability, and speed of the app is crucial. For example, the gaming app has to present definite actions to bring the right experience.

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Measure What You Impact, Not What You Influence

CSS Wizardry

As I see it, there are two main issues when it comes to measuring performance changes (note, not improvements , but changes) in the lab: Site-speed is nondeterministic 1. I can reload the exact same page under the exact same network conditions over and over, and I can guarantee I will not get the exact same, say, DOMContentLoaded each time.

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Amplify PowerUP: From APM to Observability

Dynatrace

The general agreed-upon definition of. We start with metrics, traces, and logs (that’s table stakes) but also provide context and enrichment through topology, behavior, code, metadata, and network, combined with data from application programming interfaces (API) and OpenTelemetry. Figure 2 The scope of Observability compared to APM.

DevOps 214
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Critical CSS? Not So Fast!

CSS Wizardry

Note that the CSS file is marked as blocking (see the orange cross), and thus carries Highest priority and hits the network first. priority request, and hits the network after the JavaScript. We’ve fetched the file asynchronously but had zero impact on performance, because anything synchronous in the is render-blocking by definition.

Media 351
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Optimizing Video For Size And Quality

Smashing Magazine

A video with large dimensions or a high bitrate will take longer to download and will require a higher speed network to play back smoothly. This leads to longer startup times, and if the network cannot supply the video fast enough, the video will stall during video playback. Bitrate is the playback speed of the video.

Network 143
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How to use Server Timing to get backend transparency from your CDN

Speed Curve

Cue server-timing headers Historically, when looking at page speed, we've had the tendency to ignore TTFB when trying to optimize the user experience. The use of server-timing headers by content delivery networks closes a big gap. Definitely worth a read! I mean, why wouldn't we? But what happens when it doesn't?

Servers 57