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Alex MacArthur

Bossing around computers in made-up languages.

Location Nashville, TN Joined Joined on  Personal website https://picperf.io github website twitter website

Education

Concordia College - Moorhead, MN

Work

Senior Software Engineer at Ramsey Solutions

Seven Year Club
Writing Debut
Six Year Club
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Why I Like Using Maps (and WeakMaps) for Handling DOM Nodes
alexmacarthur profile

Why I Like Using Maps (and WeakMaps) for Handling DOM Nodes

#javascript #performance
1
Comments 1
6 min read
When a JavaScript WeakMap() Actually Came in Handy
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When a JavaScript WeakMap() Actually Came in Handy

#javascript #ecmascript #weakmap #performance
4
Comments 1
5 min read
I think the ergonomics of generators is growing on me.
alexmacarthur profile

I think the ergonomics of generators is growing on me.

#javascript #generators #iterables
Comments
11 min read

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There are a lot of ways to break up long tasks in JavaScript.
alexmacarthur profile

There are a lot of ways to break up long tasks in JavaScript.

#performance #javascript
Comments
10 min read
Using Forced Reflows, the Event Loop, and the Repaint Cycle to Slide Open a Box
alexmacarthur profile

Using Forced Reflows, the Event Loop, and the Repaint Cycle to Slide Open a Box

#performance #dom #animation
Comments
7 min read
You Might As Well Use a Content Security Policy
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You Might As Well Use a Content Security Policy

#csp #security #xss
Comments
7 min read
Avoiding a "Host Permission" Review Delay When Publishing a Chrome Extension
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Avoiding a "Host Permission" Review Delay When Publishing a Chrome Extension

#chrome #chromium #extension
Comments
4 min read
Collect All Requested Images on a Website Using Puppeteer
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Collect All Requested Images on a Website Using Puppeteer

#puppeteer #images
Comments
5 min read
TIL: inline event handlers still fire when passed to React's dangerouslySetInnerHTML
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TIL: inline event handlers still fire when passed to React's dangerouslySetInnerHTML

#react #xss #security
Comments
5 min read
Streaming Text Like an LLM with TypeIt (and React)
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Streaming Text Like an LLM with TypeIt (and React)

#typewriter #animation
Comments
3 min read
I didn't know you could use sibling parameters as default values in functions.
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I didn't know you could use sibling parameters as default values in functions.

#javascript #functions #parameters #arguments
Comments
3 min read
JamComments Now Offers AI-Powered Moderation
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JamComments Now Offers AI-Powered Moderation

#ai #blogging
Comments
3 min read
It’s Probably Worth Converting that GIF to an Animated WebP
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It’s Probably Worth Converting that GIF to an Animated WebP

#webp #gif #performance
Comments
5 min read
Adding Structured Data in Astro's Starlight Documentation Framework
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Adding Structured Data in Astro's Starlight Documentation Framework

#comments #documentation #jsonld
Comments
4 min read
The Machines Would Appreciate More Structured Data
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The Machines Would Appreciate More Structured Data

#seo #metadata
Comments
8 min read
Looking Forward to (Hopefully) Not Needing Responsive Images One Day
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Looking Forward to (Hopefully) Not Needing Responsive Images One Day

#performance #html
Comments
3 min read
You Might Consider Using an Image Sitemap
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You Might Consider Using an Image Sitemap

#seo #sitemap
Comments
6 min read
The Architecture Might Not Be the Problem
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The Architecture Might Not Be the Problem

#architecture #patterns
Comments 1
4 min read
Transform Image URLs with a Simple Cloudflare Worker
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Transform Image URLs with a Simple Cloudflare Worker

#cwv #performance
Comments
7 min read
Maintain a Healthy Sense of Caution Whenever Running a `curl|bash` Command
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Maintain a Healthy Sense of Caution Whenever Running a `curl|bash` Command

#bash #curl #security
Comments
5 min read
It's never been easier to performantly put images on the web.
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It's never been easier to performantly put images on the web.

Comments
6 min read
Why Am I Getting a 502 Bad Gateway After Turning on Plausible?
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Why Am I Getting a 502 Bad Gateway After Turning on Plausible?

#analytics #502
Comments 1
2 min read
How to Back Up Your Self-Hosted Plausible Analytics Data
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How to Back Up Your Self-Hosted Plausible Analytics Data

#analytics #backups
3
Comments 1
3 min read
Raise the API Rate Limit for a Self-Hosted Instance of Plausible
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Raise the API Rate Limit for a Self-Hosted Instance of Plausible

#analytics
Comments
3 min read
Let's Bring Back JavaScript's `with()` Statement
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Let's Bring Back JavaScript's `with()` Statement

#javascript #ecmascript
Comments
11 min read
Server-rendering your UI is expensive!
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Server-rendering your UI is expensive!

#server #rendering
Comments
1 min read
You should still look at your site with JavaScript disabled.
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You should still look at your site with JavaScript disabled.

#javascript #performance #cwv
Comments
1 min read
Strive for Being "Feature-Complete"
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Strive for Being "Feature-Complete"

#software #opensource
Comments
1 min read
There Are a Lot of Ways to Hide Stuff in the Browser
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There Are a Lot of Ways to Hide Stuff in the Browser

#css #a11y #html
Comments
9 min read
Lighthouse is Not Your End User
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Lighthouse is Not Your End User

#performance #cwv
Comments
1 min read
Deserializing Polymorphic Lists with Kotlin, Jackson, and Spring Boot
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Deserializing Polymorphic Lists with Kotlin, Jackson, and Spring Boot

#kotlin #typescript #serialization
Comments
6 min read
Executing Dangerously Injected Scripts Inside React Components
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Executing Dangerously Injected Scripts Inside React Components

#react #synchronous #xss
2
Comments
6 min read
For Maximum Accessibility, Be Careful About Using a .dev Domain
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For Maximum Accessibility, Be Careful About Using a .dev Domain

#tld #domains #dns
Comments
5 min read
Don't Let Visitors Know Your Origin Server Exists
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Don't Let Visitors Know Your Origin Server Exists

#performance #caching #optimization
2
Comments
8 min read
PicPerf's Impact on Jane Ross Tutoring's Website
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PicPerf's Impact on Jane Ross Tutoring's Website

#performance #optimization
Comments
2 min read
TIL: The Download Attribute Doesn’t “Just Work” for Cross-Origin Resources
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TIL: The Download Attribute Doesn’t “Just Work” for Cross-Origin Resources

#html #downloads #navigation
Comments
3 min read
Get All That Network Activity Under Control with Priority Hints
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Get All That Network Activity Under Control with Priority Hints

#performance #cwv #hints
1
Comments
9 min read
Your Cache Headers Could Probably be More Aggressive
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Your Cache Headers Could Probably be More Aggressive

#performance #caching
1
Comments
6 min read
Reviewing PicPerf's Impact on SongwriterCity.com
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Reviewing PicPerf's Impact on SongwriterCity.com

#performance #business #images
Comments
3 min read
Building a Two-Way Data Binding Hook for Form Inputs in React
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Building a Two-Way Data Binding Hook for Form Inputs in React

#react #javascript #forms #vue
Comments 2
5 min read
Taking Variable Fonts for a Spin
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Taking Variable Fonts for a Spin

#fonts #performance #ui
Comments
5 min read
Run Puppeteer with Docker on Fly.io
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Run Puppeteer with Docker on Fly.io

#docker #puppeteer #chrome
Comments
5 min read
How to Better Leverage Browser Preloading
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How to Better Leverage Browser Preloading

#preloading #performance #javascript
Comments
7 min read
Mount a Multi-Page SPA into an App with Server-Side Routing
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Mount a Multi-Page SPA into an App with Server-Side Routing

#spa #react #routing #laravel
2
Comments
5 min read
Why I Moved from Notion to Ghost for My Headless CMS
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Why I Moved from Notion to Ghost for My Headless CMS

#blogging #cms
2
Comments
6 min read
Picking the Right Tool for Maneuvering JavaScript's Event Loop
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Picking the Right Tool for Maneuvering JavaScript's Event Loop

#javascript
Comments
12 min read
Elegant Memoization with Ruby’s .tap Method
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Elegant Memoization with Ruby’s .tap Method

#ruby #performance
Comments
5 min read
Options for Navigating JavaScript's Event Loop
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Options for Navigating JavaScript's Event Loop

#javascript #performance
Comments
12 min read
If Possible, Don't Run Prism.js in the Browser
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If Possible, Don't Run Prism.js in the Browser

#javascript #performance
Comments
5 min read
Consider Animating Your Canvas in a Web Worker
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Consider Animating Your Canvas in a Web Worker

#javascript #performance
Comments
4 min read
More Elegant Destructuring with JavaScript Generators
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More Elegant Destructuring with JavaScript Generators

#javascript
Comments
3 min read
Use a MutationObserver to Handle DOM Nodes that Don’t Exist Yet
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Use a MutationObserver to Handle DOM Nodes that Don’t Exist Yet

#mutationobserver #polling #javascript
Comments
5 min read
You’ve Got Options for Removing Event Listeners
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You’ve Got Options for Removing Event Listeners

#javascript #events
Comments
5 min read
Use the .matches() Method to Determine if a Selector Matches an Element
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Use the .matches() Method to Determine if a Selector Matches an Element

#javascript #html
Comments
3 min read
What I Like About Astro
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What I Like About Astro

#astro #performance #jamstack
Comments
7 min read
How to Lazy Load Disqus for Improved Site Performance
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How to Lazy Load Disqus for Improved Site Performance

#performance #blogging
Comments
4 min read
Keep Using Disqus if You Don’t Care About SEO, Performance, and User Privacy
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Keep Using Disqus if You Don’t Care About SEO, Performance, and User Privacy

#performance #blogging #seo #privacy
Comments
8 min read
When I Actually Needed useLayoutEffect() in React
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When I Actually Needed useLayoutEffect() in React

#react #performance #hooks
Comments
5 min read
Serving Notion Presigned Images with Cloudflare Workers
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Serving Notion Presigned Images with Cloudflare Workers

#cloudflare #edge #notion #jamstack
6
Comments
9 min read
I’ve Boarded the SSG Train Again
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I’ve Boarded the SSG Train Again

#jamstack #ssg #remix #ssr
1
Comments
10 min read
Why Can’t You .forEach() Over Empty Array Items?
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Why Can’t You .forEach() Over Empty Array Items?

#javascript #loop #foreach #iterator
3
Comments 2
3 min read
Using Vite to Develop an SPA in the Context of a Production Page
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Using Vite to Develop an SPA in the Context of a Production Page

#vite #spa #proxy
Comments
9 min read
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