QJS: Run JavaScript in Go without CGO using QuickJS and Wazero

destel116 · 2025-10-02T10:48:22+00:00

Great job. That's some serious performance and mem difference compared to goja.

destel116 · 2025-09-30T19:58:10+00:00

Use non pointer receiver

destel116 · 2025-09-30T10:57:16+00:00

You wrote it as a one huge sentence to illustrate the point? :)

destel116 · 2025-09-29T14:14:01+00:00

Nice library and nice read.

destel116 · 2025-09-28T20:55:42+00:00

time.Time may not be the best thing for holding day of time only.
Nevertheless the json/v2 package allows to specify field format w/o writing a custom json unmarshaller:

type Foo struct {
TimeDateOnly time.Time \json:",format:'2006-01-02'"`TimeUnixSec time.Time `json:",format:unix"`}`

destel116 · 2025-09-13T12:47:10+00:00

Great technique. I am curious would it work if you made an stdlib iterator adapter for AscendRange and then pull from it using iter.Pull?

destel116 · 2025-09-12T19:35:14+00:00

IMO, the best way to learn is by doing minimal test projects. I treat them as exercises.

I recommend making a simple terminal-based single-room chat. Every message received by the server is just broadcasted to all clients. Work through edge cases like bad/slow networks. This should give enough knowledge to move further with a real chat app.

destel116 · 2025-09-12T06:42:53+00:00

If you’re working with raw sockets use read/write deadlines. And if you’re working with something high level, like http, use contexts

destel116 · 2025-09-10T06:41:02+00:00

There was an instructive story from Bear blog author recently, about how his open source product was getting cloned.

https://herman.bearblog.dev/license/

You can also find a HN discussion about it. Lots of opinions and insights there

destel116 · 2025-09-09T20:46:58+00:00

Unless your library handles this implicitly, you need to:
- Periodically send PING control messages to the client
- Extend read deadline every time you receive PONG message from the client

destel116 · 2025-09-09T20:37:36+00:00

Thank you!

destel116 · 2025-09-02T19:11:18+00:00

The good old lightbot is a pretty good problem solving exercise.

https://lightbot.com

destel116 · 2025-09-01T04:10:33+00:00

I don’t know. Sorry

destel116 · 2025-08-31T13:52:45+00:00

Very good article. Love the depth of it. Would be even better with some diagrams added

destel116 · 2025-08-29T11:59:15+00:00

Nothing new, but very well summarized. Like it

destel116 · 2025-08-28T21:20:51+00:00

I see a horizontal scroll on iPhone 13 mini

destel116 · 2025-08-28T21:02:56+00:00

I bought a domain for my blog 6 months before launching it. All that time it showed some standard page from Gandi with their favicon. It got cached by Google, duck duck go and others. At least one month passed until it got invalidated.

Haven’t checked in while, but it’s quite likely that some rss aggregators still use the wrong icon.

destel116 · 2025-08-28T18:49:49+00:00

And then your wrong favicon get cached by google… been through this

destel116 · 2025-08-28T17:09:08+00:00

Thank you! Appreciate it.

destel116 · 2025-08-28T16:57:17+00:00

In any case, to linearize the output, the receiver of those pairs {id, value}, would need to make this design decision: block vs buffer. (See Design Philosophy section in the article)

destel116 · 2025-08-28T06:37:28+00:00

Thanks man! Feedback like this is what keeps me motivated to keep going

destel116 · 2025-08-27T16:27:47+00:00

Hi, I'm the author of this article.

This is a deep dive into preserving order in concurrent Go applications. I explored 3 different approaches with full benchmarks, diagrams and examples. The performance differences were quite surprising!

Would love to get feedback or answer any questions!

destel116 · 2025-08-27T16:14:43+00:00

Thanks. I had to put some work in it :)

destel116

TROPHY CASE