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Bitwise in the Browser: The Superpower You Have Been Ignoring

Presentation byAdefisayo Adejumo

Bitwise operators are often overlooked in the JavaScript ecosystem—viewed as obscure or only relevant in low-level programming. However, they are among the most powerful and efficient tools available right in the browser. Because they operate directly at the number level, bitwise operations are incredibly fast in JavaScript engines, making them ideal for a wide range of practical uses:

Collision masks in browser-based game engines

Interfacing with WebAssembly

Lightweight compression techniques

Real-time audio/video streaming

Clever hacks for text encoding and emoji maths

Presented at these Events
Cover Photo for JSMonthly August Meetup
Wed, Aug 20th · 5:30PMIn-Person

JSMonthly August Meetup

Primary Photo for JavaScript Monthly London MeetupJavaScript Monthly London Meetup
Presented with these Guilds
Cover Photo for JavaScript Monthly London Meetup
Primary Photo for JavaScript Monthly London Meetup

JavaScript Monthly London Meetup

Javascript evolution has sped up (a lot) in recent years and event the most veterans developers find it hard to keep up with the latest trends. This meetup group aims to bring you monthly bite-sized updates on the world of Javascript along with a healthy dose of nice people, beer and pizza.

Please use your full name when registering, as some of our venues require a full list of attendees beforehand. You have an idea and you want to be a speaker?

We are always looking for more speakers - submit your talk here (https://docs.google.com/forms/d/e/1FAIpQLSdFaatfveOUbrmer47jYb5J4J4ttxAFc1CgTjUDltBXmDOJmg/viewform)

1.2KMembers
Similar Presentations
Cover Photo for Web Performance as Rocket Science

Web Performance as Rocket Science

Building applications for the web has evolved over the years. With new technologies and frameworks promising different things, browsers have also gotten smarter. Across board, we still prioritize creating a fast, seamless and accessible experience for users. This talk will be focused on simplifying some of the steps we can start practicing, to optimize for performance in web applications.

Adewale Abati
Cover Photo for JavaScript at the speed of Rust

JavaScript at the speed of Rust

If you write JS or TS, probably every tool you use daily is currently being rewritten in Rust.

This has advantages (have you heard that Rust is "blazing fast"?), but also potential downsides.

The evolution of JS from the dark days before async/await was fuelled by tooling written in JS. If our tools migrate to a language we don't know, will we lose the ability to control or customize them?

In this talk, I'll explain how in Oxc (the compiler underlying the next generation of the open source Vite bundler), we're trying to "square the circle" - providing rich customisation via plugins written in JS, but maintaining the exceptional performance of Rust - and take you into the nerdy details of memory layouts, allocators, garbage collection, and the tricks that make it possible to have our Rusty cake and eat it with a JS fork.

Jim Dummett (Overlook Motel)
Cover Photo for I Was Understanding WASM All Wrong! 🤯

I Was Understanding WASM All Wrong! 🤯

What is bytecode? Don't all encodings use bytes? Is WASM just a replacement for JavaScript? And does it have anything to do with Rust?

Yuji Isobe (VP of Engineering at NearMe) will talk about his WASM journey. He will explain what he has learned, and point out things he misunderstood, so that you don't make the same wrong assumptions. Even if you're already familiar with WASM, his performance analysis will likely surprise you. Join us to learn why WASM is a giant leap forward, not just for the frontend but for computing in general. And last but not least, understand what it means from the perspective of Rust development.

Slides here

Primary Photo for {0} {1}Yuji Isobe
Cover Photo for JS with Types 💪

JS with Types 💪

For JS Devs who like Types, but not TypeScript
(as well as Go and Zig devs who want more from JS)

I'm doing the full (40min Preso + 10min Q&A) version of my UtahJS Conf talk, JS with Types 💪, Thursday (tomorrow) at 7pm MT (online only)

Please share, invite others, and join in and ask questions.

Slides at https://jswithtypes.com

Twitch: https://twitch.tv/coolaj86

YouTube: https://youtube.com/coolaj86

AJ ONeal

Platform Sponsors

Sponsor Logo for {0}

Torc is a community-first platform bringing together remote-first software engineer and developer opportunities from across the globe. Join a network that’s all about connection, collaboration, and finding your next big move — together.

Join our community today!

Sponsor Logo for {0}

Don't let broken lines of code, busted API calls, and crashes ruin your app. Join the 4M developers and 90K organizations who consider Sentry “not bad” when it comes to application monitoring. Use code “guild” for 3 free months of the team plan.

https://sentry.io

Bitwise in the Browser: The Superpower You Have Been Ignoring

Presentation byAdefisayo Adejumo

Bitwise operators are often overlooked in the JavaScript ecosystem—viewed as obscure or only relevant in low-level programming. However, they are among the most powerful and efficient tools available right in the browser. Because they operate directly at the number level, bitwise operations are incredibly fast in JavaScript engines, making them ideal for a wide range of practical uses:

Collision masks in browser-based game engines

Interfacing with WebAssembly

Lightweight compression techniques

Real-time audio/video streaming

Clever hacks for text encoding and emoji maths

Presented at these Events
Cover Photo for JSMonthly August Meetup
Wed, Aug 20th · 5:30PMIn-Person

JSMonthly August Meetup

Primary Photo for JavaScript Monthly London MeetupJavaScript Monthly London Meetup
Presented with these Guilds
Cover Photo for JavaScript Monthly London Meetup
Primary Photo for JavaScript Monthly London Meetup

JavaScript Monthly London Meetup

Javascript evolution has sped up (a lot) in recent years and event the most veterans developers find it hard to keep up with the latest trends. This meetup group aims to bring you monthly bite-sized updates on the world of Javascript along with a healthy dose of nice people, beer and pizza.

Please use your full name when registering, as some of our venues require a full list of attendees beforehand. You have an idea and you want to be a speaker?

We are always looking for more speakers - submit your talk here (https://docs.google.com/forms/d/e/1FAIpQLSdFaatfveOUbrmer47jYb5J4J4ttxAFc1CgTjUDltBXmDOJmg/viewform)

1.2KMembers
Similar Presentations
Cover Photo for Web Performance as Rocket Science

Web Performance as Rocket Science

Building applications for the web has evolved over the years. With new technologies and frameworks promising different things, browsers have also gotten smarter. Across board, we still prioritize creating a fast, seamless and accessible experience for users. This talk will be focused on simplifying some of the steps we can start practicing, to optimize for performance in web applications.

Adewale Abati
Cover Photo for JavaScript at the speed of Rust

JavaScript at the speed of Rust

If you write JS or TS, probably every tool you use daily is currently being rewritten in Rust.

This has advantages (have you heard that Rust is "blazing fast"?), but also potential downsides.

The evolution of JS from the dark days before async/await was fuelled by tooling written in JS. If our tools migrate to a language we don't know, will we lose the ability to control or customize them?

In this talk, I'll explain how in Oxc (the compiler underlying the next generation of the open source Vite bundler), we're trying to "square the circle" - providing rich customisation via plugins written in JS, but maintaining the exceptional performance of Rust - and take you into the nerdy details of memory layouts, allocators, garbage collection, and the tricks that make it possible to have our Rusty cake and eat it with a JS fork.

Jim Dummett (Overlook Motel)
Cover Photo for I Was Understanding WASM All Wrong! 🤯

I Was Understanding WASM All Wrong! 🤯

What is bytecode? Don't all encodings use bytes? Is WASM just a replacement for JavaScript? And does it have anything to do with Rust?

Yuji Isobe (VP of Engineering at NearMe) will talk about his WASM journey. He will explain what he has learned, and point out things he misunderstood, so that you don't make the same wrong assumptions. Even if you're already familiar with WASM, his performance analysis will likely surprise you. Join us to learn why WASM is a giant leap forward, not just for the frontend but for computing in general. And last but not least, understand what it means from the perspective of Rust development.

Slides here

Primary Photo for {0} {1}Yuji Isobe
Cover Photo for JS with Types 💪

JS with Types 💪

For JS Devs who like Types, but not TypeScript
(as well as Go and Zig devs who want more from JS)

I'm doing the full (40min Preso + 10min Q&A) version of my UtahJS Conf talk, JS with Types 💪, Thursday (tomorrow) at 7pm MT (online only)

Please share, invite others, and join in and ask questions.

Slides at https://jswithtypes.com

Twitch: https://twitch.tv/coolaj86

YouTube: https://youtube.com/coolaj86

AJ ONeal

Platform Sponsors

Sponsor Logo for {0}

Torc is a community-first platform bringing together remote-first software engineer and developer opportunities from across the globe. Join a network that’s all about connection, collaboration, and finding your next big move — together.

Join our community today!

Sponsor Logo for {0}

Don't let broken lines of code, busted API calls, and crashes ruin your app. Join the 4M developers and 90K organizations who consider Sentry “not bad” when it comes to application monitoring. Use code “guild” for 3 free months of the team plan.

https://sentry.io

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