Joined July 2020
- Tweets 3,935
- Following 408
- Followers 4,810
- Likes 3,977
766 Photos and videos
May 29
Our most requested feature is live
You can now run Docker containers (and setup FUSE, VPNs...) on @vercel Sandbox
May 29
Run Docker inside Vercel Sandbox.
▪︎ Build and run containers in full isolation
▪︎ Persist installs and images across sessions
▪︎ Run databases, test suites, or full apps
vercel.com/changelog/run-doc…
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If you are a standout infra engineer who wants to be in London, message me.
May 23
Never heard so many standout infra engineers AI infra eng actively wanting to leave Meta than now.
A month ago they were building cutting-edge infra and then got assigned to AI data labelling
Most of them went “WTH” and now I’m the middle of interviewing
Madness from Meta
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Apr 11
In ~1 month, we shaved off 2.2s to run `node -v` on a fresh @vercel sandbox. Now largely sub-500ms
Team is absolutely cooking
Apr 11
Vercel Sandboxes are now the fastest sandbox using real VMs as security boundary based on the @computesdk benchmark. The team has been absolutely cooking on this.
And the best thing: Because we have a unified Fluid Compute stack across Sandbox, Builds, and Functions these wins are often shared across the stack.
On the feature side there is a really exciting roadmap ahead as well.
My favorites (all driven by feature requests from our customers):
- Persistent sandboxes (in beta, GA immanent)
- The fully mutable firewall also becomes fully programmable
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Apr 8
« You can just optimize things »
Apr 8
Vercel Sandbox snapshot restores are now up to 40x faster.
A deep dive on how we did it ↓
vercel.com/blog/optimizing-v…
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Tom Lienard retweeted
Mar 26
Vercel Sandboxes can now automatically save their filesystem state when stopped and restore it when resumed.
Automated persistence enable your sandboxes to continue where agents left off, without manually snapshotting.
Available in beta ↓
vercel.com/changelog/vercel-…
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Tom Lienard retweeted
Jan 22
Vercel Sandboxes now support filesystem snapshots.
Capture complete state with 𝚜𝚊𝚗𝚍𝚋𝚘𝚡.𝚜𝚗𝚊𝚙𝚜𝚑𝚘𝚝() to skip repeatedly slow setup steps like git clone and dependency installation.
vercel.com/changelog/filesys…
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Tom Lienard retweeted
19 Nov 2025
@tomlienard Sherif linter is amazing 🚀
github.com/QuiiBz/sherif
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15 Nov 2025
Updated sherif (JS monorepo linter) with an even better version picker for unsynced dependencies
Repository for demo was chosen completely arbitrarily, do not blame them
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Tom Lienard retweeted
29 Oct 2025
You asked, we shipped 🫡
Buntime is now in beta on @vercel Fluid compute, supporting @nextjs @nitrojsdev @honojs @expressjs @sveltejs and many more coming soon
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29 Oct 2025
You asked, we shipped 🫡
Buntime is now in beta on @vercel Fluid compute, supporting @nextjs @nitrojsdev @honojs @expressjs @sveltejs and many more coming soon
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29 Oct 2025
Better performance with Active CPU pricing, streaming, o11y, etc
vercel.com/blog/bun-runtime-…
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We now support Bun on Vercel.
Bun is an open runtime pushing the frontier on DX and performance.
Start building and see our latest benchmarks.
vercel.fyi/buntime
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Tom Lienard retweeted
10 Sep 2025
You can now run Vercel Sandboxes for up to 5 hours (up from 45 minutes).
𝚊𝚠𝚊𝚒𝚝 𝚂𝚊𝚗𝚍𝚋𝚘𝚡.𝚌𝚛𝚎𝚊𝚝𝚎({
𝚝𝚒𝚖𝚎𝚘𝚞𝚝: 𝟻 * 𝟼𝟶 * 𝟼𝟶 * 𝟷𝟶𝟶𝟶, // 𝟻 𝚑𝚘𝚞𝚛s
});
This new max duration is available for Pro & Enterprise teams.
vercel.com/changelog/vercel-…
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Tom Lienard retweeted
8 Sep 2025
You can now listen for the 𝚂𝙸𝙶𝚃𝙴𝚁𝙼 signal in Vercel Functions to run cleanup tasks before termination.
𝚙𝚛𝚘𝚌𝚎𝚜𝚜.𝚘𝚗('𝚂𝙸𝙶𝚃𝙴𝚁𝙼', () => {
// 𝙿𝚎𝚛𝚏𝚘𝚛𝚖 𝚌𝚕𝚎𝚊𝚗𝚞𝚙 𝚘𝚙𝚎𝚛𝚊𝚝𝚒𝚘𝚗𝚜 𝚑𝚎𝚛𝚎
});
vercel.com/changelog/vercel-…
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29 Jul 2025
Serverless servers are so back
Here’s a technical deep dive into @vercel's compute infra, and how our team implemented features like HTTP streaming and Fluid compute to improve perf & reduce costs
Fluid makes it possible to ship AI and backend workloads without the gotchas of serverless.
It prevents cold starts, it adds streaming and post-response compute support, and massively improves cost-efficiency.
Here's how we engineered it
vercel.com/blog/fluid-how-we…
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25 Jun 2025
🚢 My favorite @vercel Ship announcement (no I’m not biased):
Active CPU pricing for Fluid compute, 50%-90% cheaper. You’re billed for CPU when actually computing, not when waiting for I/O, with a small fee for the provisioned memory
Middlewares and Sandbox (new!) also use the same pricing, and even CPU-bounds projects will see significant bills reduction
Fluid compute now uses Active CPU pricing. Only pay CPU rates when your function is actively computing.
Building on existing Fluid gains, this brings additional cost savings of up to 90% for workloads like LLM calls, AI agents, or tasks with idle time.
vercel.com/blog/introducing-…
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