David Behroozi
@rootothez.bsky.social
Solo developer. Doing the impossible; faster. https://speedrun.cc AWS Community Builder.
PSA: There is a performance penalty when using named exports with ESM import vs. require on built-in node modules. This is why the AWS JavaScript V3 SDK has 50 ms slower Lambda coldstarts on Node 22+. Some notes here: github.com/aws/aws-sdk-...
February 10, 2026 at 6:57 PM
PSA: There is a performance penalty when using named exports with ESM import vs. require on built-in node modules. This is why the AWS JavaScript V3 SDK has 50 ms slower Lambda coldstarts on Node 22+. Some notes here: github.com/aws/aws-sdk-...
Look, the plating and bread choice leaves room for improvement. But the flavor of my latest Persian-American cuisine; the sumac avocado toast slaps.
February 3, 2026 at 4:45 PM
Look, the plating and bread choice leaves room for improvement. But the flavor of my latest Persian-American cuisine; the sumac avocado toast slaps.
After many exasperated console.log's I looked at the docs and discovered CloudFront functions don't run on responses with a status code >= 400. So my edge metrics only work on successful requests. docs.aws.amazon.com/AmazonCloudF...
January 24, 2026 at 3:54 PM
After many exasperated console.log's I looked at the docs and discovered CloudFront functions don't run on responses with a status code >= 400. So my edge metrics only work on successful requests. docs.aws.amazon.com/AmazonCloudF...
Seeing some Dr. Suess bird in my latte this morning
January 23, 2026 at 4:13 PM
Seeing some Dr. Suess bird in my latte this morning
Ode to 2025. My pithy year in review. "May your 2026 involve some hand-written code and may it compile without errors." speedrun.nobackspacecrew.com/blog/2026/01...
2025 year in review - Speedrun
A fun look back on 2025
speedrun.nobackspacecrew.com
January 9, 2026 at 11:13 PM
Ode to 2025. My pithy year in review. "May your 2026 involve some hand-written code and may it compile without errors." speedrun.nobackspacecrew.com/blog/2026/01...
It's important to know someone in London. Eventually you'll need their help unsubscribing from Domino's UK marketing because the US is region blocked 😂.
January 9, 2026 at 6:39 PM
It's important to know someone in London. Eventually you'll need their help unsubscribing from Domino's UK marketing because the US is region blocked 😂.
I swear AWS had some hero image on a docs site with this hotel carpet vibe once.
January 5, 2026 at 10:03 PM
I swear AWS had some hero image on a docs site with this hotel carpet vibe once.
Took a quick break from the curiosities of London to have a curry and a pint with Cloudflare's lord of logs and corduroy trousers @ankcorn.dev
December 31, 2025 at 4:35 PM
Took a quick break from the curiosities of London to have a curry and a pint with Cloudflare's lord of logs and corduroy trousers @ankcorn.dev
A short story:
1. This showed up in the group chat
2. Replied with "Nicolas UNCAGED?"
3. Checked El goog to see if this pun was a world first
4. Alas
1. This showed up in the group chat
2. Replied with "Nicolas UNCAGED?"
3. Checked El goog to see if this pun was a world first
4. Alas
December 28, 2025 at 1:08 PM
A short story:
1. This showed up in the group chat
2. Replied with "Nicolas UNCAGED?"
3. Checked El goog to see if this pun was a world first
4. Alas
1. This showed up in the group chat
2. Replied with "Nicolas UNCAGED?"
3. Checked El goog to see if this pun was a world first
4. Alas
Boris is still at it and still gets it. Logging properly is on you and rn your: loggingsucks.com
December 21, 2025 at 9:00 PM
Boris is still at it and still gets it. Logging properly is on you and rn your: loggingsucks.com
The answer to why account based endpoints didn't reduce the blast radius of the DynamoDb Oct event was in DAT458. They don't point to cells yet, they still point to the regional endpoint🤦♂️. youtu.be/YZUNNzLDWb8?...
December 17, 2025 at 7:42 AM
The answer to why account based endpoints didn't reduce the blast radius of the DynamoDb Oct event was in DAT458. They don't point to cells yet, they still point to the regional endpoint🤦♂️. youtu.be/YZUNNzLDWb8?...
I'm relishing using AI to click the bait for me.
December 9, 2025 at 7:41 PM
I'm relishing using AI to click the bait for me.
Clearly the old spice product marketing team was cut from the same cloth as me.
December 8, 2025 at 8:15 PM
Clearly the old spice product marketing team was cut from the same cloth as me.
This is very clever. Tom Larkworthy shows how to unaggregate CloudWatch metrics and some neat insights you get when you do: observablehq.com/@tomlarkwort...
December 7, 2025 at 1:30 AM
This is very clever. Tom Larkworthy shows how to unaggregate CloudWatch metrics and some neat insights you get when you do: observablehq.com/@tomlarkwort...
Not sure I want my company outlined in chalk but safety in numbers at re:invent.
December 3, 2025 at 5:54 PM
Not sure I want my company outlined in chalk but safety in numbers at re:invent.
I got Cloudflare Workers to act as an API Gateway and do granular throttling for a Lambda using github.com/mhart/aws4fe...
1. I really like 𝚠𝚛𝚊𝚗𝚐𝚕𝚎𝚛 𝚍𝚎𝚟 to rapidly iterate
2. Cloudflare Workers are way better than CloudFront Functions
1. I really like 𝚠𝚛𝚊𝚗𝚐𝚕𝚎𝚛 𝚍𝚎𝚟 to rapidly iterate
2. Cloudflare Workers are way better than CloudFront Functions
November 26, 2025 at 4:40 AM
I got Cloudflare Workers to act as an API Gateway and do granular throttling for a Lambda using github.com/mhart/aws4fe...
1. I really like 𝚠𝚛𝚊𝚗𝚐𝚕𝚎𝚛 𝚍𝚎𝚟 to rapidly iterate
2. Cloudflare Workers are way better than CloudFront Functions
1. I really like 𝚠𝚛𝚊𝚗𝚐𝚕𝚎𝚛 𝚍𝚎𝚟 to rapidly iterate
2. Cloudflare Workers are way better than CloudFront Functions
There is not a deep enough place in hell for the continue reading button, the random playing video and the slop ads below the fold.
November 23, 2025 at 2:36 AM
There is not a deep enough place in hell for the continue reading button, the random playing video and the slop ads below the fold.
Been messing with Cloudflare Workers after reading @boristane.bsky.social boristane.com/blog/what-ar...
Delighted to find how easy it is to implement granular api throttling: developers.cloudflare.com/workers/runt... Something I've wished I could do with Cloudfront Functions for some time.
Delighted to find how easy it is to implement granular api throttling: developers.cloudflare.com/workers/runt... Something I've wished I could do with Cloudfront Functions for some time.
Boris Tane
Notes from 2 years of building with Cloudflare Durable Objects
boristane.com
November 13, 2025 at 12:07 AM
Been messing with Cloudflare Workers after reading @boristane.bsky.social boristane.com/blog/what-ar...
Delighted to find how easy it is to implement granular api throttling: developers.cloudflare.com/workers/runt... Something I've wished I could do with Cloudfront Functions for some time.
Delighted to find how easy it is to implement granular api throttling: developers.cloudflare.com/workers/runt... Something I've wished I could do with Cloudfront Functions for some time.
If you use Discord and don't want everyone to know what you are doing, turn this off: Settings -> Activity Privacy.
November 10, 2025 at 1:52 AM
If you use Discord and don't want everyone to know what you are doing, turn this off: Settings -> Activity Privacy.
Armored up and went ball hunting in the blackberries. Lightly shredded, but I can now play lacrosse, rugby, soccer, tee-ball and ultimate.
November 5, 2025 at 1:34 AM
Armored up and went ball hunting in the blackberries. Lightly shredded, but I can now play lacrosse, rugby, soccer, tee-ball and ultimate.
The Cognito M2M pricing was repealed! Now it's $2.25/1000 tokens regardless of number of clients. aws.amazon.com/about-aws/wh...
Amazon Cognito removes Machine-to-Machine app client price dimension - AWS
Discover more about what's new at AWS with Amazon Cognito removes Machine-to-Machine app client price dimension
aws.amazon.com
November 4, 2025 at 12:43 AM
The Cognito M2M pricing was repealed! Now it's $2.25/1000 tokens regardless of number of clients. aws.amazon.com/about-aws/wh...
I've started tagging my CDK projects so I can find them on disk when I inevitably need to upgrade the Lambda runtime.
October 28, 2025 at 4:13 PM
I've started tagging my CDK projects so I can find them on disk when I inevitably need to upgrade the Lambda runtime.
They briefly mention the account based endpoints in the writeup: aws.amazon.com/message/1019... But my question remains, were those endpoints also impacted? Were the teams that couldn't get to dynamo not using the account based endpoints?
October 23, 2025 at 4:59 AM
They briefly mention the account based endpoints in the writeup: aws.amazon.com/message/1019... But my question remains, were those endpoints also impacted? Were the teams that couldn't get to dynamo not using the account based endpoints?
Ha! Something good came of the AWS incident Monday. I purchased a day pass to SlingTV to watch the Mariners play only to find I bought the wrong color (bought orange instead of blue which had the game). There aren't refunds on day passes, but due to the outage, they refunded me. I'll allow it!
October 23, 2025 at 2:21 AM
Ha! Something good came of the AWS incident Monday. I purchased a day pass to SlingTV to watch the Mariners play only to find I bought the wrong color (bought orange instead of blue which had the game). There aren't refunds on day passes, but due to the outage, they refunded me. I'll allow it!
When the dust settles with the DynamoDB DNS issue, i'd be interested in understanding if it impacted the main DNS only: dynamodb.us-east-1.amazonaws.com or also the account id based DNS: .ddb.us-east-1.amazonaws.com? The account id DNS should have reduced the blast radius in theory.
October 21, 2025 at 9:21 PM
When the dust settles with the DynamoDB DNS issue, i'd be interested in understanding if it impacted the main DNS only: dynamodb.us-east-1.amazonaws.com or also the account id based DNS: .ddb.us-east-1.amazonaws.com? The account id DNS should have reduced the blast radius in theory.