天空вℓσи∂

**I have a job now!**

I'm a Chinese shitizen, but I generally don't post in Chinese to avoid being suffering from other Chinese.

I'm physically a male, but I don't care how people think about my gender. I can be male, or female, or cat. But if you ask, I'd prefer to be referred to as male. Also, I support LGBT+ people, and I'm a copyleft. I don't think I'm too aggressive in arguing things, but sometimes I do. You should handle it with care.

I post about programming (most time is Java and Kotlin, unless I have a new love), and some random things I find interesting. I also post about my mental health, which is in a stable state of instability, thanks to my parents and Chinese society.

Anyway, if you want to follow me, I'm glad to see you. And, have a nice day.

Alt: @skyblond

Last Notes

2025-04-15 16:33:40 GMT

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@nprofile…hpxz No? As far as I know, neither I nor my families have asthema before... Initially the symptoms start with my nose and throat, which feels like a common cold or something. I did have antibody tests for covid, flu a, flu b and mp, but all of them are negative. Yesterday I went to the hospital mentioning the intensive coughing during the night. The doctor gives the nebulizer as a precaution, along with Singulair.

2024-12-06 08:08:23 GMT

I would count this as an abuse of `@Deprecated`...
I was shocked when I first saw all possible implementations are deprecated but the field is still used actively in another class.
https://media.social.qoto.org/media_attachments/files/113/604/845/140/033/647/original/dd55d4f50990a06e.png
https://media.social.qoto.org/media_attachments/files/113/604/846/248/666/597/original/1a47ff78d6813202.png

2024-05-23 13:30:14 GMT

I paid 0.526USD/Hour on AWS and only get 2 FPS.
I rent a GPU on vast.ai for less than 0.5USD/Hour, and I got 12.5 FPS.
Today's lesson: Do not trust AWS.
https://media.social.qoto.org/media_attachments/files/112/490/640/761/204/873/original/55b8bea572b8805d.png

2024-05-19 14:37:31 GMT

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@npub1axm…dsle I don't think so. Yolo is the core method to detect birds in a video, and my laptop's 3070 is too weak. A powerful GPU instance will cost money, but will be much faster...

2024-05-19 09:44:59 GMT

OK... So now basically every VPS provider requires additional verification in order to use their GPU instance.
Just start doing it with AWS. It said my account needed to be verified before I can create GPU instances. Then I got my account verified. After that they said I don't have the quota to create any GPU instance. Now I'm working on increasing that f*ck quota.
I don't know why. After all this processing, I still need to pay for my bill.

2024-05-07 11:48:05 GMT

Did some biking today. I found myself pretty hard to finish 20KM. Today I rode 19.31KM in 58 minutes, and I'm so tired.
I miss the old me from 6 months ago who can ride 35KM in 2 hours and still feel that's not enough.

2024-04-24 04:38:13 GMT

The most understandable explanation to me.
----
Antenna Theory Directivity
By Doug LeBlanc
https://www.youtube.com/watch?v=ysNkjEnoRsU

2024-04-21 02:14:05 GMT

https://media.social.qoto.org/media_attachments/files/112/306/791/652/182/931/original/282b3882cbdbb1fc.jpg

2024-03-26 05:40:19 GMT

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@npub1kpw…xzz4 Oh, now it makes sense to me.

2024-03-26 05:37:46 GMT

Just learnt another English phrase: throw up. I thought vomit is "throw off" since every time I vomit, I face down instead of up.
Can't imagine what it looks like when you face up when vomiting.
Ehh

2024-02-09 06:26:35 GMT

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@npub1kpw…xzz4 A real paper based calendar?

2023-08-10 16:29:53 GMT

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@npub1kpw…xzz4 oh.. my bad. I did a quick google search and found Python is quite different from JVM. On JVM, a thread is always a kernel thread. On Python, it might or might not be (StackOverflow told me this). So when I initially thought about GIL, I thought it would be act like a monitor lock on JVM, which cause a kernel thread to suspend and have a relatively huge penalty.
And after another goolge search, yes, I do mean statically typed and strongly typed, where you need to declare the type of a variable and cannot change it on the fly.

2023-08-10 16:19:30 GMT

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@npub1kpw…xzz4 ok, thanks, that's some updates to my knowledge base :ablobthinking:
Based on my experience on JVM, when I switched from JVM's native thread to Kotlin coroutines (which is based on threads but is able to share threads, so less thread suspension overall), I got a free performance boost. I assume go can achieve the similar thing. If so, I would say there is a free optimization without largely redesigning the algorithm.
Also, I always prefer strong typed languages when co-op with other developers. Python makes me panic when I don't know what the type of variable x :ablobgrimace:

2023-08-10 16:07:48 GMT

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@npub1kpw…xzz4 @npub1ukc…40jn Based on my limited knowledge of python, the multithreading part is pretty heavy, if I recall correctly, you need a new python process to start a new thread (sounds familiar with JVM :ablobthinking: ). And go is pretty good at multithreading (I mean user-mode threads). If not limited by the IO, I would assume a go implementation will speed up some of the process. Maybe also ease the load on developers, considering go offers some great built-in multithreading structures.

2023-08-10 16:02:46 GMT

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@npub1kpw…xzz4 @npub1ukc…40jn I do hear the matrix developers say there will be a go implementation to replace the slow and resource demanding python version. Is that still in alpha stage?
(As a jealous JVM lover, I don't trust Python 😂 )

2023-07-05 16:39:15 GMT

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@npub1kpw…xzz4 Yeah, I wrote a lot when I was in school, and carbon black ink is better than the black dye ink.Thee dye-based one looks like dark purple instead of true black.
But now I mainly write things with pencil (easy to change the design), so the carbon ink often dried in the pen.

2023-07-05 16:34:48 GMT

@npub1kpw…xzz4 I have a #3776 Century (F tip) from Platinum, it's the cheapest model (~100 USD). I started using it since high school and now I still use it.
I'm not a fan of collecting pens, but I do like using pens since I don't need to swap the cartridges (the Gel Pen Refills). This pen works very well. Before that, I was using LAMY (also the cheapest model, about ~20 USD), but it had a lot of problems and I eventually decided to invest more.
I like using carbon black ink, however it's not good for pens, especially when you don't write a lot. But this pen handles it pretty well.
But now I rarely do handwriting after graduated. I don't know if this is good, but the ultrasonic cleaner is pretty good at dealing with dried carbon ink.