karl_p

8 ms·

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Show HN: Photo Reviewer 4Net (C#, JavaScript, remote web UI, cross platform)(github.com)
1 points by karl_p 10mo ago|0 comments
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by karl_p 1y ago
As the mythical man month says: never ship the prototype. Plan to write one and then throw it away.
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by karl_p 1y ago
Location: Chicago, IL Remote: Yes Willing to relocate: No Technologies: C#, AWS, CDK, Postgres, DynamoDB, Snowflake Résumé/CV: https://karl-pickett.dev/resume Email: On resume 25 years of uncompressible experience. I
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by karl_p 1y ago
The JVM can relocate memory to avoid fragmentation. Rust can't, at least natively. Are they not worried about this regression?
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Grumpy Old Man: Error Handling and Hubris(karl-pickett.medium.com)
2 points by karl_p 1y ago|0 comments
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by karl_p 6y ago
https://aws.amazon.com/blogs/compute/using-amazon-rds-proxy-... > Your function code is cleaner, simpler, and easier to maintain. I don't think your post covers the nuances. "Not a correct implementa
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AWS Lambda Is Not a Magic Reliability Wand(medium.com)
3 points by karl_p 6y ago|3 comments
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How to make a parallelized cron job in AWS, for the laziest programmers(medium.com)
1 points by karl_p 6y ago|0 comments
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by karl_p 8y ago
Hmm, I spent >10 years with Python and on large/important apps it's hard to refactor and slow. (PS they're still using Python 2 as well). I want to pivot to C# on Linux / .Net Core.
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by karl_p 8y ago
Hi, author here. Thanks for the kind words! I ported the static site generator for patternedpom.com (sells handmade cards) from Python to C# without changing any layout or styling (PS I don't claim to be a frontend person). It was a
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Benchmarking 1M C# tasks vs. Go goroutines(medium.com)
15 points by karl_p 8y ago|5 comments
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by karl_p 8y ago
My wife looked into instacart and we canceled after learning they don't provide business car insurance for their drivers. What a scam.
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by karl_p 8y ago
Yeah, I should clarify what I was saying. I wasn't calling Task.Run(), but I was doing: for (var i = 0; i < 1000000; i++) { var unused_task_var = RunTaskAsync(); } await RunMainMonitoringTaskAsync(); And I
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by karl_p 8y ago
That is a good post and a valid criticism. I'd say the more important concern with c# is to be careful you're not accidentally calling a "really blocking" function from an async method, or you will lose scalability. The
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by karl_p 8y ago
That is what I thought until I wrote the benchmark(s) in the post. I was surprised that even though I never called Task.Run, things were being run on 4-10 background threads. It does use a threadpool scheduler by default for a console app.
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by karl_p 8y ago
They have specified the lambda runtime. https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.ht... Basically: your instance POSTS to an endpoint to get/reply to requests, one at a time. I can'
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by karl_p 8y ago
Correct, hard to use TCP for 500K connections for a quick test when there are only 64K source ports which suffer from TIME_WAIT issues as bonus. It uses Unix Stream sockets.
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by karl_p 8y ago
It still will be amortized by your application's data. For example, reading and buffering actual messages. The benchmark literally just has a one byte "buffer" per connection. I threw this benchmark together in a couple of
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by karl_p 8y ago
Ugh, I later realized I'm off by a factor of 4 because statm shows values in 4K pages, not 1K units.
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I measured the overhead of a single C# async task (coroutine): ~250 bytes(github.com)
1 points by karl_p 8y ago|1 comments