---
title: "Perfwizardry"
url: https://daily.dev/posts/perfwizardry-qijfw6psl
source_url: https://hidde.blog/perfwizardry
type: article
source: "Hidde de Vries — hidde.blog"
published: 2026-05-31T07:48:44.323Z
updated: 2026-05-31T09:03:20.145Z
tags: ["webdev"]
reading_time: 6
upvotes: 0
comments: 0
language: en
---

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# Perfwizardry

**[Hidde de Vries — hidde.blog](https://daily.dev/sources/hiddedevries)** · 6 min read · 0 upvotes · 0 comments

## Summary

Notes from a web performance workshop by Harry Roberts covering how to sell performance internally, key metrics to measure (especially Speed Index and RUM), network fundamentals like latency vs bandwidth and head-of-line blocking, resource hints (DNS prefetch, preconnect, preload), common anti-patterns like Base64 encoding and domain sharding, and how HTTP/2 and Service Workers change performance best practices.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://hidde.blog/perfwizardry>

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---

Tags: [#webdev](https://daily.dev/tags/webdev)

[View this post on daily.dev](https://daily.dev/posts/perfwizardry-qijfw6psl)