Viewing profile — CompuIves

Very cool to see more use of userfaultfd, really powerful API because you can fully control how and from where memory is loaded during a pagefault.

This is really cool to see, reminds me of the early days of CodeSandbox. Though this API looks _fantastic_. I love that you do VM configuration using `with`.

I think this is very similar! Really cool to see. The first version we launched used the exact same approach (MAP_PRIVATE). Later on, we bypassed the file system by using shared me…

Yes, that's right. The Firecracker team has written a fantastic doc about this as well: https://github.com/firecracker-microvm/firecracker/blob/main... . It's important to refresh …

I talk a bit about this here: https://codesandbox.io/blog/cloning-microvms-using-userfault... . Before VM A updates its data, the data is copied over to VM B if VM B hadn't written…

Oh wow! Unexpected and cool to see this post on Hacker News! Since then we have evolved our VM infra a bit, and I've written two more posts about this. First, we started cloning VM…

It's a block for non-US IPs, I think. The page is an application form for joining them, and it only accepts US citizens.

A new post in what is slowly becoming a series! Happy to discuss this or answer any questions here.

Exactly, the result would've been different if the author would not have disabled caching. In this case it's because the iframes are loaded/unloaded multiple times, but we also spa…

If you want to be efficient in Amsterdam, you take the bike or public transport. That has been faster than cars even before this change, and now more so.

Hey all! I'm one of the co-founders of CodeSandbox. Happy to answer any (technical) questions about this release or CodeSandbox in general!

Yes! But I work on CodeSandbox, so that creates some bias :). We've been working on our own CDE solution, though we've taken a different spin to improve speed and cost. Our solutio…

The editor on CodeSandbox runs web VSCode, and in that version we emulate Node.js in the browser to run local extensions.

Thank you! > custom io_uring based driver for the VM block devices? or what do you mean here? We're using the async io backend that's shipped with Firecracker for our scratch disks…

At CodeSandbox we use Firecracker for hosting development environments, and I agree with the points. Though I don't think that means you should not use Firecracker for running long…

Yes, we use this at CodeSandbox for reclaiming memory to the host (and to reduce snapshot size when we hibernate the VM).

At CodeSandbox ( https://codesandbox.io ) we're also working on this! Main focus of us is that we're running the environment in Firecracker microVMs, which allows us to snapshot an…

Hey all! I'm super excited to share more of the inner workings of CodeSandbox. Happy to talk about the implementation or microVMs/infra in general.