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Is postMessage slow? - HTTP 203
Context and Optimizations - HTTP 203
Scope in JavaScript - HTTP 203
Weak JavaScript - HTTP 203
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Jake and Surma chat about a new feature proposal, Import Maps, that lets you alter how JavaScript modules are imported. Jake and Surma talk about new things involving the Canvas API. Including, but not limited to: OffscreenCanvas: ... In this episode, Jake (that's him on the left) and Surma (that's the other one) chat about how the different image formats load, and ... This week, Paul & Jake talk about the future of JavaScript: ES6 and beyond. Watch more
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Last Updated: June 6, 2026
About of Is Postmessage Slow Http 203

Jake and Surma look at workers and the performance of their messaging primitive Jake and Surma talk about the importance of context when making performance optimizations and some common mistakes that ... Jake and Surma take a deep dive into the world of variable scoping in JavaScript. var vs const/let and scripts vs modules. Surma and Jake take a look at 'weak' JavaScript, specifically WeakMap, WeakSet, and the new and shiny WeakRefs. Surma ... Jake shows Surma an actual thing he built using a new In this episode, Jake and Surma discuss the array function reduce(). Is it good to use it? Is it too “smart”? Does it increase or ...
Jake & Surma go through the top 9 + 1 performance issues Jake saw while analyzing a bunch of In nodejs you can 'require' JSON. The same feature was added to the HTML spec, but then it was removed. Jake and Surma ... Surma and Jake have a discussion, weighing up the benefits and drawbacks between Single Page Apps (SPAs) and Multi Page ... You've seen loads of counter tutorials online, but they're all a bit wrong or at least most of them are. Jake and Surma dissect ... Jake and Surma tackle the age-old problem: what should you include in an image's alt text? Mentioned in the episode: Chrome ... Surma tries to explain WebAssembly, threads and WebAssembly Threads to Jake. He also has scary diagrams and uses ...
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