Sebastian Korfmann

@skorfmann.com

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Exploring MCP and agentic coding, both personally and for the enterprise context. Based in #hamburg - https://skorfmann.com

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Sebastian Korfmann·Sep 4

#hamburg #alster

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Sebastian Korfmann·Jun 10

At the JS meetup in Hamburg - gonna talk about agentic coding #claudecode

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Sebastian Korfmann·Jul 23

Really love how agentic coding tools are levelling the playing field of building software

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Latest posts

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Sebastian Korfmann·Oct 20

The ipad pro just became way more attractive for dev tasks for me www.anthropic.com/news/claude-...

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Sebastian Korfmann·Oct 19

Who might that „someone“ be? 👀 #claude

• Found the problem! Look at line 163 in cached_reader.go: |
// Wait for value to be processed
time.Sleep(10 * time.Millisecond)
Every GeoIP cache miss sleeps for 10 milliseconds!
This is the bottleneck! The Ristretto cache library is asynchronous,
and
someone added a fixed time. Sleep(10ms) to
"wait for the value to be processed." This is a terrible implementation.
Here's what's happening:
- Cache hit:
~15us (microseconds)
- Cache miss: 10ms sleep + actual
lookup time X
With your test data, many IPs are unique, so you're getting lots of cache misses - 10ms penalty per miss.
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Sebastian Korfmann·Oct 17

Just built a skill for Claude to estimate Pub/Sub cost in GCP - it contains the actual pricing data and a python script to do accurate calculations. This is pretty cool stuff!

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Sebastian Korfmann·Oct 17

Need something like this 🤖

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Sebastian Korfmann·Oct 17

Claude Code starts getting fancy

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Sebastian Korfmann·Oct 15

Are the new macbooks any good? Or would one just get an ipad pro and a remote vm to run Claude Code?

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Sebastian Korfmann·Oct 15

Have a Google cloud project which I’m working on recently, and I must say it’s a quite nice experience overall so far

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Sebastian Korfmann·Oct 14

Turns out I was running my external hard-drive on the wrong port on my Mac Studio 🤪 And who fixed it? Claude Code.

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Sebastian Korfmann·Oct 13

Buckle up, I'm gonna use "terraform test" 😅

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Sebastian Korfmann·Oct 7

There was a talk about the Agent Client Protocol on our last agentic coding meetup here in Hamburg - glad so see that the protocol gets broader adoption zed.dev/blog/jetbrai...

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