> Markdown version of [/videos/1985-speeding-up-web-apps-performance-with-webassembly-and-emscripten?t=466](https://www.wearedevelopers.com/videos/1985-speeding-up-web-apps-performance-with-webassembly-and-emscripten?t=466). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

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# Speeding up Web Apps performance with WebAssembly and Emscripten

WebAssembly isn't a magic speed button. Learn how to use Emscripten to port native libraries, manage memory boundaries, and truly optimize CPU-bound web workloads.

- **Speakers:** [Paweł Aniszewski](https://www.wearedevelopers.com/@pawel-aniszewski)
- **Event:** World Congress 2026 Europe - Virtual Stage
- **Published:** July 2, 2026
- **Duration:** 32:48
- **URL:** https://www.wearedevelopers.com/videos/1985-speeding-up-web-apps-performance-with-webassembly-and-emscripten
- **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/77178d0872ca0058d0f1e50d625468d4/thumbnails/thumbnail.jpg?time=258860ms

## Access

Playback and chapters for this video are available with a Free account.

## Related Moments

- [Optimizing memory management and data processing with WebAssembly](https://www.wearedevelopers.com/videos/1747-uncharted-territories-of-web-performance-andrew-burnett-thompson-and-david-burleigh) (from "Uncharted Territories of Web Performance - Andrew Burnett-Thompson and David Burleigh")
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- [Accelerating WebAssembly to JavaScript data reads](https://www.wearedevelopers.com/videos/1747-uncharted-territories-of-web-performance-andrew-burnett-thompson-and-david-burleigh) (from "Uncharted Territories of Web Performance - Andrew Burnett-Thompson and David Burleigh")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/5f75b4bb35e3741faeeb0f74ad44278a/thumbnails/thumbnail.jpg?time=137525ms
- [Evaluating performance differences between WebAssembly and JavaScript](https://www.wearedevelopers.com/videos/871-wasm-deep-dive-a-glance-behind-the-scenes) (from "Wasm Deep Dive - A Glance Behind the Scenes")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/b5438c8561cfd70bc6bca1038e7074ba/thumbnails/thumbnail.jpg?time=13615ms
- [Understanding hardware performance advantages of WebAssembly code](https://www.wearedevelopers.com/videos/1794-wearedevelopers-live-from-javascript-to-webassembly-high-performance-charting-and-more) (from "WeAreDevelopers LIVE – From JavaScript to WebAssembly, High-Performance Charting and More")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/0fe863e6b4afc957d92d3527a5932da2/thumbnails/thumbnail.jpg?time=346355ms
- [Compilers and runtimes in the WebAssembly ecosystem](https://www.wearedevelopers.com/videos/886-webassembly-the-next-frontier-of-cloud-computing) (from "WebAssembly: The Next Frontier of Cloud Computing")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/a03b8285ed2d0dcc51481d9d8d489978/thumbnails/thumbnail.jpg?time=214070ms
- [The origins and design principles of WebAssembly](https://www.wearedevelopers.com/videos/673-fun-with-paas-how-to-use-cloud-foundry-and-its-uniqueness-in-creative-ways) (from "Fun with PaaS – How to use Cloud Foundry and its uniqueness in creative ways")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/cbd462028c2ec5adcb36ce3c3a05e777/thumbnails/thumbnail.jpg?time=96950ms

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