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Comment by colesantiago | Hacker News Reader

It looks like Crystal is gaining traction.

Which companies use Crystal in anger / production in front of real users?

I believe Kagi is a heavy user of the language.

~70k LOC Crystal

Mentioned in the crystal conf talk held by a Kagi Developer

My last company (Rainforest QA) used it in quite a few places when ruby wasn't fast enough, though a lot of Go too.

At Heii On-Call, we use Crystal to power the API server https://api.heiioncall.com/ as well as other internal components.

do you use kemal?

Hopefully they use Grip, a much better framework with encapsulation

Invidious, a self-hosted YouTube front-end. is written in Crystal.

And its resource usage is depressing. Isn’t Crystal garbage collected? I’m not sure why it has memory leaks.

Also, >300 MB of RAM usage (in docker. Some might be the system) with only 2 users after running for a while seems a bit too much

How would you know the memory leak was the Crystal part?

I’m not the first one facing these issues.

Oh is this why Invidious' setup documentation recommends restarting Invidious every hour or so?

I ended up just throwing it 4 gigs of memory and it has pretty much been fine ever since. I do restart every few weeks when it reaches 1 GB though

(Not an Invidious user myself. I just looked at the source code a while back to see what they were doing. But I never tried compiling or using it.)

We use it to do nightly sitemap generation of over 30 million links. Takes about 30 minutes, replaced a Ruby (Rails) process that took hours.