Jeremy Morrell
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jeremymorrell.dev
Jeremy Morrell
@jeremymorrell.dev
2.5K followers 610 following 5.1K posts
Principal engineer @ Cloudflare. I talk about tech sometimes

Location: Squamish, BC 🇨🇦
Website: https://jeremymorrell.dev/
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jeremymorrell.dev
Yes! My steam deck has basically been a Hades 2 machine since EA 😅
Steam play time showing 188 hours on Hades 2
November 9, 2025 at 6:53 PM
jeremymorrell.dev
I’m working on clearing out my garage of gear and stuff that I’ll likely never use again, and this is the listing I put up for these giant cams
Truly enormous 9 inch cams, home made by one guy in a garage shop and they look it. They are burly and heavy but there was no commercial equivalent a decade ago and there may still not be Have your eye on sending Pipeline next season? Are perfect hand jams just not nearly painful enough for you? Do your back and ankles have just *too much* skin? Offwidth might be for you! Come back alive by getting the right protection My offwidth days are behind me so come get these 2 enormous cams for a bargain. https://weighmyrack.com/brand/valley-giant Me on the crux section of Pipeline. It’s a ~7 inch overhanging crack and my body is fully inside with only my face and one arm visible. My expression is one of extreme anguish
November 7, 2025 at 4:55 PM
jeremymorrell.dev
This was a bit more than that. I should maybe have just bought the real ones 😅 I just kind of winged it with some black pipes and connectors and bolted the thing to my desk with everything tightened as much as possible
The underside of the cat bed showing black pipes connected together with flanges screwed into the desk and a piece of wood for the cat bed
November 3, 2025 at 1:48 AM
jeremymorrell.dev
The kitten seems to have accepted the home-made cat bed I built for my desk 🥰
A gray and white kitten resting in a gray soft cat bed atop a cat tree attached to a desk made out of the thick black pipes sometimes used for coffee tables and the like
November 3, 2025 at 12:49 AM
jeremymorrell.dev
Trick or Treating is going to be… interesting this year. Kids are still psyched tho
Weather app showing 10c (50F) and raining all evening
October 31, 2025 at 10:58 PM
jeremymorrell.dev
I have enjoyed working with this team so so much 🧡
Tweet from Zeb: This has been what I've been working on for nearly a year now, super excited to finally do the first release of Automatic Tracing. Starting today anyone with Observability enabled will automatically get traces generated for their Workers that are present in the Cloudflare dashboard and can be sent to third party observability providers. We've had internal teams and select customers using this for a while and they've been able to make good performance gains through the increased understanding of what's happening in their Worker. But, today's release is only the first of many. There are several things that we didn't have time to include in this first release like context propagation for distributed tracing, user-created spans, even span events, or even some CF bindings we didn't get to instrument. All of these gaps are on the tracing roadmap and will be released as they're ready, but in the meantime there's still a lot of useful data for those that have Workers in production. Everyone on the Workers Observability team did a stellar job on this, but specifically @JeremyMorrell was incredible in making sure everything was thought through and would be built to last. Also big shout-out to the folks on the runtime team that created the new runtime primitives for tracing, @DanLapidCF Felix and Mar. We literally couldn't have done this without them and they worked their asses off on building this for us.
October 28, 2025 at 1:36 PM
jeremymorrell.dev
It looks like wrangler / esbuild is defaulting to the commonJS build for some reason? You can get better results by setting an ENV var to force it to use the ESM build. I'm not sure if this could break anything.

We're still at 24kb though. Feels like we can probably do better
.env file containing: WRANGLER_BUILD_CONDITIONS=module,import Analysis from https://esbuild.github.io/analyze/ showing a 24kb bundle. We no longer see things like metrics, however we do have quite a bit of internal stuff
October 26, 2025 at 12:04 AM
jeremymorrell.dev
Playing around with @opentelemetry.io api in JS and @cloudflare.social wrangler bundles.

Importing the trace module to generate spans probably shouldn't be bringing in 63kb of JS 😬
Hello world cloudflare worker that only brings in @opentelemetry/api to generate a single span import { trace } from '@opentelemetry/api'; let tracer = trace.getTracer('my-tracer'); export default { async fetch(request, env, ctx): Promise<Response> { let span = tracer.startSpan('fetch'); span.setAttribute('http.method', request.method); span.setAttribute('http.url', request.url); span.setAttribute('http.status_code', '200'); span.end(); return new Response('Hello World!'); }, } satisfies ExportedHandler<Env>; ESBuild analysis from https://esbuild.github.io/analyze/ showing that this simple import brings in 63kb of JS including lots of things we're not using like baggage and metrics
October 25, 2025 at 11:54 PM
jeremymorrell.dev
It's kinda complicated tbh qiolor.com/blogs/news/r...
As of recent legislation, Class 1 and Class 2 e-bikes are generally permitted on trails designated for bicycle use within state recreation areas unless specifically prohibited. However, many wilderness areas and sensitive ecological zones restrict all motorized vehicles, including e-bikes. Under current federal policy, e-bikes are permitted in National Parks wherever traditional bicycles are allowed, including park roads, paved or hardened trails, and areas designated for off-road motor vehicle use. However, individual park superintendents retain the authority to restrict e-bike access in specific areas. For instance, Yosemite National Park permits e-bikes on all paved roads where traditional bicycles are allowed but prohibits them on most unpaved trails. Death Valley National Park, conversely, allows e-bikes on many backcountry roads, offering unique opportunities for desert e-biking adventures.
October 24, 2025 at 6:18 PM
jeremymorrell.dev
Soon 👀
Tweet from my PM: Something ✨new✨ is coming to Workers Observability 👀 can you guess what it is Plus an illustration of someone sitting in front of a big dashboard with a conspicuous trace waterfall view in the top left
October 23, 2025 at 1:02 AM
jeremymorrell.dev
This phrase comes to mind a lot lately
A red poster with a rocking horse. Overlaid is text: Dont mistake motion for progress
October 12, 2025 at 2:25 AM
jeremymorrell.dev
“Momentum theater” captures a lot of what bothers me about the “omg we’re cooking so hard, shipping so fast” posturing that seems so common these days
There's a reason 996 culture flourishes in companies that haven't figured out product-market fit. If you have something people want, you don't need to run your team into the ground to move units. If you don't, all that's left is momentum theater. I've seen teams work twelve-hour days trying to brute-force their way to growth. It rarely ends well. They burn out before they break through.
October 12, 2025 at 2:25 AM
jeremymorrell.dev
but also smol
Screencap from a youtube walkthrough of the car. The boxy car only comes up to just below the man's shoulders, and takes up maybe 60% of a parking space.
October 6, 2025 at 6:21 PM
jeremymorrell.dev
Claude basically one-shotted it (though I lost a few hours trying to figure out how to work with accessibility permissions during development in XCode 😅)

This feels so so much better than anything else I've been able to find
September 27, 2025 at 11:38 PM
jeremymorrell.dev
Being able to send email was probably my biggest missing feature from the Cloudflare platform. So excited to see this beta! blog.cloudflare.com/email-service/
Code snippet showing a Cloudflare binding for sending email export default { async fetch(request, env, ctx) { await env.SEND_EMAIL.send({ to: [{ email: "hello@example.com" }], from: { email: "api-sender@your-domain.com", name: "Your App" }, subject: "Hello World", text: "Hello World!" }); return new Response(`Successfully sent email!`); }, };
September 25, 2025 at 1:28 PM
jeremymorrell.dev
I keep thinking about this
Kelly Sommers tweet. When you partition by tenant you gain simplicity between modules. Consistency for read your own writes across modules or micro services. You can increase hardware at a tenant level as well. Just thinking out loud. Kelly Sommers tweet. I'm not really sure how I feel about this take but a long growing thought in my mind is how too many small SaaS companies shard databases by micro service not by tenant. This means users experience more inconsistencies prematurely before scale is a true issue.
September 23, 2025 at 4:30 PM
jeremymorrell.dev
I thought I was starting to get the hang of C++ but… the rabbit hole goes so much deeper
Meme: okay ima fight C++. Damn C++ got hands
September 3, 2025 at 11:01 PM
jeremymorrell.dev
The kids are starting Clone Wars. I’d forgotten how N64 the graphics are
A close up of a very blocky 3d rendered Yoda
August 31, 2025 at 2:18 AM
jeremymorrell.dev
So the view from the Cloudflare NYC office is… slightly ridiculous
Looking down on Manhattan from 80 stories up
August 29, 2025 at 5:20 PM
jeremymorrell.dev
This has been my solution for a month or so now. I still use the Apple trackpad too, but this is nice when I’m mostly typing
A ZSA voyager with a ploopy nano trackball below the thumb
August 25, 2025 at 10:35 PM
jeremymorrell.dev
Squamish summer vibes 🥰

Biked with the kiddos to dinner and we hit up the ice cream truck on the way home. Very thankful for AAA bike infra
A child eating ice cream at a red picnic table in front of a river. In the background looms the Squamish Chief, a 1500ft granite monolith
August 23, 2025 at 2:03 AM
jeremymorrell.dev
I like this logic, but lived experience has taught me that the world can stay irrational for much much longer than I would ever have expected, and in surprising ways
Simple math: OpenAl recently raised forty billion dollars. OpenAl's current burn rate is eight billion a year and increasing. This means they have at most five years of runway. To put it another way, this means that if they do not alter their trajectory or raise more money, they will be dead within five years, so by 2030 at the latest.
August 12, 2025 at 3:11 PM
jeremymorrell.dev
I’ve had to chase this fellow away from my green bins at 2am every night for the past week. Finally got a good look in the daylight

He’s a lot less scary when it’s not pitch black!
A brown Black Bear is walking away after I shouted at them. My poor green bin is toppled with the top mangled
August 12, 2025 at 12:27 AM
jeremymorrell.dev
With all the “sipping rocket fuel” AI talk, this poster has been coming to mind a lot lately
Red poster with a rocking horse. In white letters it says “Don’t mistake motion for progress”
August 7, 2025 at 3:34 AM
jeremymorrell.dev
Literally the same meme. Peasant doing manual labor: we should improve society somewhat Reply guy popping up from a well: Yet you participate in society. Curious! I am very intelligent.
August 4, 2025 at 3:53 PM