#### article
## Learn everything about third party JS performance
[Milica Mihajlija](https://twitter.com/bibydigital) is back with an incredibly comprehensive, three-part guide to third party JavaScript performance. Dealing with external JavaScript can be difficult, especially when we need extra tooling. Make sure to read the follow up on [identifying](https://web.dev/identify-slow-third-party-javascript) and [efficiently loading](https://web.dev/efficiently-load-third-party-javascript) third party code.
[Third-party javascript performance →](https://web.dev/third-party-javascript)
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## Choose the fastest rendering method for your app
[Addy Osmani](https://twitter.com/addyosmani) and [Jason Miller](https://twitter.com/_developit) explain the differences between all flavours of server and client-side rendering so you can make informed decisions when choosing your app architecture. Rehydration? Prerendering? Which one is going to make your product the fastest it can be?
[Rendering on the Web →](https://developers.google.com/web/updates/2019/02/rendering-on-the-web)
#### article
## Performance and accessibility are your MVP
Performance and accessibility have been on the backburner for a long time, resulting in the Web becoming increasingly hostile to its viewers. In his article, [Robin Rendle](https://css-tricks.com/accessibility-and-web-performance-are-not-features-theyre-the-baseline/) shares his thoughts on why performance and accessibility have to become a crucial requirement when launching new products and sites.
[Accessibility and web performance are not features, they’re the baseline →](https://css-tricks.com/accessibility-and-web-performance-are-not-features-theyre-the-baseline/)
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## What are the consequences of slow code?
More and more [people in the mainstream tech press](https://daringfireball.net/linked/2019/08/16/wayne-performance-matters) are noting the importance of perceived speed. [Hillel Wayne](https://twitter.com/hillelogram) describes a sobering example of how a minor lag in software can affect emergency medical technician’s work of saving lives.
[performance matters →](https://www.hillelwayne.com/post/performance-matters/)
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## Understand the impact of lossy network on speed
We’re used to tracking performance through the lens of front-end and user-experience metrics, but a lot can be discovered when we begin to investigate the network. [Tobias Baldauf](https://twitter.com/tbaldauf) explains how Trivago improved their performance by through looking into packet loss.
[The Web Performance Impact Of Lossy Network Conditions →](https://tech.trivago.com/2019/08/08/the-web-performance-impact-of-lossy-network-conditions/)
