Tim Caswell
@creationix.blue
Lover of all things good in life including Family, Friends, Food, and Functional Programs.
⚒️ Creator of http://luvit.io and http://nvm.sh
👨🔬 Protocol Wizard
Making the web faster @vercel.com
⚒️ Creator of http://luvit.io and http://nvm.sh
👨🔬 Protocol Wizard
Making the web faster @vercel.com
Reposted by Tim Caswell
We’ve made all CDN serving on Vercel 10% faster (P75), while reducing memory by 15%.
Learn the behind the scenes of applying Bloom filters to this problem, while serving 1T monthly requests.
vercel.com/blog/how-we...
Learn the behind the scenes of applying Bloom filters to this problem, while serving 1T monthly requests.
vercel.com/blog/how-we...
How we made global routing faster with Bloom filters - Vercel
We replaced slow JSON path lookups with Bloom filters in our global routing service, cutting memory usage by 15% and reducing 99th percentile lookup times from hundreds of milliseconds to under 1 ms. Here’s how we did it.
vercel.com
September 19, 2025 at 10:14 PM
We’ve made all CDN serving on Vercel 10% faster (P75), while reducing memory by 15%.
Learn the behind the scenes of applying Bloom filters to this problem, while serving 1T monthly requests.
vercel.com/blog/how-we...
Learn the behind the scenes of applying Bloom filters to this problem, while serving 1T monthly requests.
vercel.com/blog/how-we...
𐐓𐑉𐐨𐐻 𐐶𐐮𐑋𐐮𐑌 𐑊𐐴𐐿 𐐸𐐷𐐭𐑋𐐲𐑌 𐐺𐐨𐐮𐑍𐑆 𐐰𐑌𐐼 𐑇𐐬 𐐮𐑌𐐻𐐲𐑉𐐮𐑅𐐻 𐐮𐑌 𐑄𐐯𐑉 𐑃𐐫𐐻𐑅, 𐐴𐐼𐐨𐐲𐑆, 𐐹𐐰𐑇𐐲𐑌𐑆, 𐐰𐑌𐐼 𐐸𐐪𐐺𐐨𐑆.
July 11, 2025 at 8:03 PM
𐐓𐑉𐐨𐐻 𐐶𐐮𐑋𐐮𐑌 𐑊𐐴𐐿 𐐸𐐷𐐭𐑋𐐲𐑌 𐐺𐐨𐐮𐑍𐑆 𐐰𐑌𐐼 𐑇𐐬 𐐮𐑌𐐻𐐲𐑉𐐮𐑅𐐻 𐐮𐑌 𐑄𐐯𐑉 𐑃𐐫𐐻𐑅, 𐐴𐐼𐐨𐐲𐑆, 𐐹𐐰𐑇𐐲𐑌𐑆, 𐐰𐑌𐐼 𐐸𐐪𐐺𐐨𐑆.
I see people get mad at genAI for the power it uses comparing it to bitcoin.
It does use a significant amount of electricity, but let's compare:
- driving to the library in my economy EV (1 kwh)
- a single bitcoin transaction (1500 kwh)
- generating a single image with stable diffusion (0.01 kwh)
It does use a significant amount of electricity, but let's compare:
- driving to the library in my economy EV (1 kwh)
- a single bitcoin transaction (1500 kwh)
- generating a single image with stable diffusion (0.01 kwh)
June 14, 2025 at 1:48 PM
I see people get mad at genAI for the power it uses comparing it to bitcoin.
It does use a significant amount of electricity, but let's compare:
- driving to the library in my economy EV (1 kwh)
- a single bitcoin transaction (1500 kwh)
- generating a single image with stable diffusion (0.01 kwh)
It does use a significant amount of electricity, but let's compare:
- driving to the library in my economy EV (1 kwh)
- a single bitcoin transaction (1500 kwh)
- generating a single image with stable diffusion (0.01 kwh)
I'm back on paternity leave for 5 more weeks. I took the first 6 weeks when she was newborn, now she's a cute 3-month old.
My wife just started nursing school a week ago and so I've had all 8 kids to myself all day. So much fun and adventure!
And I thought my day job was challenging.
My wife just started nursing school a week ago and so I've had all 8 kids to myself all day. So much fun and adventure!
And I thought my day job was challenging.
June 2, 2025 at 3:23 PM
I'm back on paternity leave for 5 more weeks. I took the first 6 weeks when she was newborn, now she's a cute 3-month old.
My wife just started nursing school a week ago and so I've had all 8 kids to myself all day. So much fun and adventure!
And I thought my day job was challenging.
My wife just started nursing school a week ago and so I've had all 8 kids to myself all day. So much fun and adventure!
And I thought my day job was challenging.
"Wo unto you rich men, that will not give your substance to the poor, for your riches will canker your souls; and this shall be your lamentation in the day of visitation, and of judgment, and of indignation: The harvest is past, the summer is ended, and my soul is not saved!"
June 2, 2025 at 1:19 AM
"Wo unto you rich men, that will not give your substance to the poor, for your riches will canker your souls; and this shall be your lamentation in the day of visitation, and of judgment, and of indignation: The harvest is past, the summer is ended, and my soul is not saved!"
This one is still bugging me, it won't go away. But I'm constantly stuck on finding a good problem I can solve well. Market research is so hard, especially when people you're don't know what they need/want because they can't imagine it existing.
We're too dependent on large free cloud services.
We're too dependent on large free cloud services.
I keep getting this feeling like there is something I need to build and put out in the world (business or service or product) related to my various system designs, (rando, caify, nibs, encantis, etc...) but I can't, for the life of me, figure out what would actually be useful to most people.
May 31, 2025 at 9:20 PM
This one is still bugging me, it won't go away. But I'm constantly stuck on finding a good problem I can solve well. Market research is so hard, especially when people you're don't know what they need/want because they can't imagine it existing.
We're too dependent on large free cloud services.
We're too dependent on large free cloud services.
"And remember in all things the poor and the needy, the sick and the afflicted, for he that doeth not these things, the same is not my disciple."
May 31, 2025 at 2:30 AM
"And remember in all things the poor and the needy, the sick and the afflicted, for he that doeth not these things, the same is not my disciple."
Reposted by Tim Caswell
I'm gonna be live teaching @jason.energy everything I've learned so far about Lua and how I've come to it from the land of JS this Thursday at 9am PT- come hang! codetv.dev/series/learn...
Intro to Lua for people who know JavaScript | Learn With Jason Season 8
Lua is a scripting language used in everything from games to embedded systems to Wikipedia. Potch teaches us why it’s cool and how to get started.
codetv.dev
April 14, 2025 at 7:06 PM
I'm gonna be live teaching @jason.energy everything I've learned so far about Lua and how I've come to it from the land of JS this Thursday at 9am PT- come hang! codetv.dev/series/learn...
Office work is group convenience at the expense of individual effectiveness.
January 21, 2025 at 5:04 PM
Office work is group convenience at the expense of individual effectiveness.
When my family moved to a northern Austin suburb years ago I had been working remote for several years already.
I interviewed at a tech company in Austin and they loved my technical skills. But then something happened...
I interviewed at a tech company in Austin and they loved my technical skills. But then something happened...
January 21, 2025 at 4:50 PM
When my family moved to a northern Austin suburb years ago I had been working remote for several years already.
I interviewed at a tech company in Austin and they loved my technical skills. But then something happened...
I interviewed at a tech company in Austin and they loved my technical skills. But then something happened...
I don't think my solar is performing well today.
January 10, 2025 at 7:16 PM
I don't think my solar is performing well today.
I don't know why, but this function implementation really makes me happy.
It took me way too long to get it right, but it's just perfect now :D
It took me way too long to get it right, but it's just perfect now :D
![export function eytzinger<T>(arr: T[]): T[] {
const n = arr.length
const tree = new Array(n)
let i = 0
function build(k: number): void {
if (k > n) return
build(2 * k)
tree[k - 1] = arr[i++]
build(2 * k + 1)
}
build(1)
return tree
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:evdiwz3kr7rtta3j67vzxs27/bafkreifrhhtum37wcfhbjwz7njszwvu56s2zsmfacrz6xx3ogbqspzwktm@jpeg)
January 10, 2025 at 1:07 AM
I don't know why, but this function implementation really makes me happy.
It took me way too long to get it right, but it's just perfect now :D
It took me way too long to get it right, but it's just perfect now :D
Reposted by Tim Caswell
This is the post that doesn't end
Yes, it goes on and on, my friend
Some people started clicking it not knowing what it was,
January 28, 2024 at 8:31 AM
This is the post that doesn't end
I keep getting this feeling like there is something I need to build and put out in the world (business or service or product) related to my various system designs, (rando, caify, nibs, encantis, etc...) but I can't, for the life of me, figure out what would actually be useful to most people.
December 6, 2024 at 4:51 AM
I keep getting this feeling like there is something I need to build and put out in the world (business or service or product) related to my various system designs, (rando, caify, nibs, encantis, etc...) but I can't, for the life of me, figure out what would actually be useful to most people.
Things I find while living with seven children, edition 2376:
There is a small white pony bead with some tiny green plant potted in it. (Pencil for scale)
There is a small white pony bead with some tiny green plant potted in it. (Pencil for scale)
December 6, 2024 at 4:45 AM
Things I find while living with seven children, edition 2376:
There is a small white pony bead with some tiny green plant potted in it. (Pencil for scale)
There is a small white pony bead with some tiny green plant potted in it. (Pencil for scale)
Lol, bluesky roast is obsessed with the dirt in my yard.
Lots of interesting insights though.
blueskyroast.com/roast/creati...
Lots of interesting insights though.
blueskyroast.com/roast/creati...
Tim Caswell: The Tech-Savvy Philosopher of Bluesky
A delightful mix of tech wisdom, existential musings, and homestead humor.
blueskyroast.com
December 6, 2024 at 4:42 AM
Lol, bluesky roast is obsessed with the dirt in my yard.
Lots of interesting insights though.
blueskyroast.com/roast/creati...
Lots of interesting insights though.
blueskyroast.com/roast/creati...
Reposted by Tim Caswell
I'm very proud these folks are succeeding to make decentralized open source social nets mainstream. I tried with Manyverse and failed, but I realize that all the bold advocacy and predictions I did for decentralized open protocols was... after all correct.
Bluesky is a PBC (public benefit corporation) with the mission “to develop and drive large-scale adoption of technologies for open and decentralized public conversation.”
From the start, our goal has been to build a decentralized social network that is usable by the mainstream.
From the start, our goal has been to build a decentralized social network that is usable by the mainstream.
November 14, 2024 at 5:22 PM
I'm very proud these folks are succeeding to make decentralized open source social nets mainstream. I tried with Manyverse and failed, but I realize that all the bold advocacy and predictions I did for decentralized open protocols was... after all correct.
I'm finally reading up on AT protocol and realizing my short time working on IPLD and CAR with @why.bsky.team was very helpful in understanding it all.
It's a great generic system, but I still wonder if it's efficient enough for my needs or if I should mix in some of my more optimized designs.
It's a great generic system, but I still wonder if it's efficient enough for my needs or if I should mix in some of my more optimized designs.
November 25, 2024 at 7:24 PM
I'm finally reading up on AT protocol and realizing my short time working on IPLD and CAR with @why.bsky.team was very helpful in understanding it all.
It's a great generic system, but I still wonder if it's efficient enough for my needs or if I should mix in some of my more optimized designs.
It's a great generic system, but I still wonder if it's efficient enough for my needs or if I should mix in some of my more optimized designs.
@pfrazee.com I was thinking about Beaker and wondering how much of that experience I can bring back.
I don't want to maintain an electron app or fork chromium, but I am wondering if I can at least make sharable hyperdrives using a collection of AT Protocol records in place of hypercore?
I don't want to maintain an electron app or fork chromium, but I am wondering if I can at least make sharable hyperdrives using a collection of AT Protocol records in place of hypercore?
November 25, 2024 at 4:52 AM
@pfrazee.com I was thinking about Beaker and wondering how much of that experience I can bring back.
I don't want to maintain an electron app or fork chromium, but I am wondering if I can at least make sharable hyperdrives using a collection of AT Protocol records in place of hypercore?
I don't want to maintain an electron app or fork chromium, but I am wondering if I can at least make sharable hyperdrives using a collection of AT Protocol records in place of hypercore?
After a month without a drop of rain (My yard became a dust bowl since we don't have grass yet), it's now been raining non-stop for a few days and I live in a mud pit!
At least the temps are really nice!
At least the temps are really nice!
November 4, 2024 at 6:04 PM
After a month without a drop of rain (My yard became a dust bowl since we don't have grass yet), it's now been raining non-stop for a few days and I live in a mud pit!
At least the temps are really nice!
At least the temps are really nice!
I have a sudden influx of followers. Does anyone know if I'm part of some starter pack? Are you all interested in tech, homesteading, art, or something else?
November 2, 2024 at 3:14 PM
I have a sudden influx of followers. Does anyone know if I'm part of some starter pack? Are you all interested in tech, homesteading, art, or something else?
Blue metal roof finally installed!
Next step is white vinyl siding...
Next step is white vinyl siding...
October 26, 2024 at 8:06 PM
Blue metal roof finally installed!
Next step is white vinyl siding...
Next step is white vinyl siding...
I'm allergic to cats, and yet we rescued this stray a while ago.
He is the most snuggly and grateful kitty I've ever seen.
I was working outside building a shed, and he walked up to me asking for snuggles.
You can hear the purring across the room when I hold him like this.
He is the most snuggly and grateful kitty I've ever seen.
I was working outside building a shed, and he walked up to me asking for snuggles.
You can hear the purring across the room when I hold him like this.
October 20, 2024 at 2:12 PM
I'm allergic to cats, and yet we rescued this stray a while ago.
He is the most snuggly and grateful kitty I've ever seen.
I was working outside building a shed, and he walked up to me asking for snuggles.
You can hear the purring across the room when I hold him like this.
He is the most snuggly and grateful kitty I've ever seen.
I was working outside building a shed, and he walked up to me asking for snuggles.
You can hear the purring across the room when I hold him like this.