Andy Jessop @AndyJessop33500 Twitter profile

Last Seen Profiles

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Andy Jessop

@AndyJessop33500

5 months

In Go, a function can return MULTIPLE results?! This is mindblowing 🤯

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Andy Jessop

@AndyJessop33500

5 months

Got an email saying @Cloudflare will start charging for D1 (their SQLite DB) 😬 Then I looked at the cost... *25 billion* reads included in my current plan. Haha, ok @cloudflare you had me worried for a second.

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Andy Jessop

@AndyJessop33500

3 months

I've been playing with LLama3 on the @Cloudflare AI Playground, and have found it to be really good at outputting structured data. Currently, I'm getting it to analyse sentiment and provide categorisation tags in JSON format, and it has got the structure right every time

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Andy Jessop

@AndyJessop33500

3 months

@jarredsumner I'm a big fan of Bun, but changes like this make me really uneasy. It should error, because it's not to spec.

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Andy Jessop

@AndyJessop33500

5 months

I've been building with JS for a looong time. Two weeks ago, I started learning Go, and now JS looks like this to me:

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Andy Jessop

@AndyJessop33500

3 months

🎉 In just a few months, I'll be joining the incredible team at @Cloudflare as a Senior Systems Engineer! 🎉 I'll be building tooling to help other developers be as productive as possible with the Workers platform. 👷 🚀 This will be epic, and I can't wait to get started!

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Andy Jessop

@AndyJessop33500

5 months

It still amazes me that when you run @Cloudflare Workers locally (e.g. via wrangler) you're using the same software as that which runs on their servers. They're making it dead easy to build, test, deploy, and debug at the edge.

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Andy Jessop

@AndyJessop33500

4 months

The new pricing for Cloudflare AI looks pretty sick. 1M tokens at $0.5 seems right on point.

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Andy Jessop

@AndyJessop33500

3 months

@bunjavascript Bun does so many things right, but then you see things like breaking JSON standards and monkey patching fetch. This is just a recipe for more fragmentation.

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Andy Jessop

@AndyJessop33500

4 months

I've been working with @bunjavascript for a while and my biggest takeaway is not the speed, but that it makes everything so much simpler than working with node (especially with TS). DX is lightyears ahead.

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Andy Jessop

@AndyJessop33500

5 months

What are some downsides of Golang? It's been about 4 days and I'm rather quickly falling in love with Go. But It would be amazing to see the other side of the coin. What don't you like about it? This could be anything related to language, community, career, whatever.

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Andy Jessop

@AndyJessop33500

5 months

@marksanborn I'm only familiar with C, Javascript, Java, so this is new to me! Apparently Python does too.

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Andy Jessop

@AndyJessop33500

6 months

I think it's happened. I'm actually at the point where @bun has replaced Node for pretty much everything I do.

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Andy Jessop

@AndyJessop33500

6 months

@bunjavascript The right decision. These self-imposed deadlines are fine for small projects, but carry risks with the larger/longer ones. It would be better to announce them much closer to release time.

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Andy Jessop

@AndyJessop33500

5 months

@wagslane We have a minimum of 25, so I would feel a little uncomfortable if you said "you have unlimited time off; 10-20 days is fine".

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Andy Jessop

@AndyJessop33500

5 months

@mattpocockuk Well, it wouldn't be abstract if we did...

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Andy Jessop

@AndyJessop33500

6 months

@jarredsumner Ludicrously fast monorepo tooling? I use Nx at work, but it takes 500ms just to startup a task. Having tooling that can detect affected changes and cache outputs, but with Bun's speed, would be a game-changer.

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Andy Jessop

@AndyJessop33500

5 months

@wagslane You say there's not a limit but you've made it quite clear that you do have a limit that is "responsible". That clearly implies that going over 20 days is irresponsible. You say it's unlimited but in practice it's very far from that.

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Andy Jessop

@AndyJessop33500

4 months

@thdxr @SemanticEntity VERY difficult not to infer age bias from your post. I mean, if you didn't mean age, and you didn't mean to imply age without saying it, then it was an uncharacteristically loose statement. Especially given its context.

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Andy Jessop

@AndyJessop33500

5 months

@GergelyOrosz I think this is already happening. Maybe not with the big models, but certainly in open source there are huge amounts of variations looking at optimising AI capabilities. You only have to look as far as the Mistral 7B family to see the innovation happening.

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Andy Jessop

@AndyJessop33500

4 months

Initial benchmark shows huge promise for my @bunjavascript monorepo. 6x as fast as Nx in this basic test.

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Andy Jessop

@AndyJessop33500

6 months

@housecor It looks like a useful tool. The only issue I have is when you're too strict about DRY you also tend to end up with premature optinisation and/or code that is difficult to change.

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Andy Jessop

@AndyJessop33500

5 months

The last few days I've been looking into #golang and I absolutely love it! I've written up a tutorial detailing how to create a (really) simple web server using Go's standard library. Link in thread 🧵 I would really appreciate your feedback as I'm very new to this language.

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Andy Jessop

@AndyJessop33500

2 months

What are you using for auth on your @Cloudflare Workers applications?

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Andy Jessop

@AndyJessop33500

7 months

@luke_brocks @GaryMarcus @Rahll OpenAI are selling this tool, aren't they?

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Andy Jessop

@AndyJessop33500

5 months

Is it fair game in Golang to use single-letter variables? I'm seeing lots of examples like this.

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Andy Jessop

@AndyJessop33500

10 months

@armandrego @fireship_dev People won't agree, but it's true. If you've ever used one I'm sure you'll agree. On the other hand, if you've ever stepped on a British plug, you might still be cursing it.

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Andy Jessop

@AndyJessop33500

5 months

@TomSmallwood I don't believe it's a tuple (Go doesn't have them). Returning multiple values forces the handler to use both of them, which I don't believe is the same in some other languages when destructuring. Commonly this is used to return errors and ensure they are handled.

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Andy Jessop

@AndyJessop33500

5 months

@wagslane I think it's a very different idea. You have a limit, it's just implicit.

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Andy Jessop

@AndyJessop33500

7 months

@joeflateau Pretty sure it's for releasing steam in a safe and controlled manner.

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Andy Jessop

@AndyJessop33500

9 months

@jaffathecake Hooking up your UI directly to the database introduces tight coupling from start to finish, so changes to either UI or BE becomes harder. This is great for productivity, and terrible for maintainability. I thought we already learned these lessons.

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Andy Jessop

@AndyJessop33500

4 months

@thorstenball The lack of a debugger is a deal-breaker.

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Andy Jessop

@AndyJessop33500

2 months

Just reading more about @Cloudflare Workers RPC, and my mind is in the process of being blown. @KentonVarda , kudos, this feels like THE new way to write workers. The other day I was building something with Durable Objects, and I thought "why can't I just call DO methods

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Andy Jessop

@AndyJessop33500

5 months

I did not expect this...it might be the first thought I've ever had that has gone viral.

Andy Jessop

@AndyJessop33500

5 months

In Go, a function can return MULTIPLE results?! This is mindblowing 🤯

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Andy Jessop

@AndyJessop33500

3 months

I can't believe how easy it is to have a capable AI running locally on your machine. Hats off to @ollama

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Andy Jessop

@AndyJessop33500

6 months

@krishnanrohit Was it invented, or discovered?

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Andy Jessop

@AndyJessop33500

5 months

@wagslane @javierdaniel If your comfortable limit is 20, give them 20, then you're not putting the burden on them to make that decision.

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Andy Jessop

@AndyJessop33500

5 months

[Golang] can anyone point me towards what you think is a Go project that has a canonical/idiomatic project structure? Could be CLI, web, whatever.

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Andy Jessop

@AndyJessop33500

3 months

Looks like @Cloudflare and @prisma teams have been working together recently! Cloudflare have announced support for D1 in the Prisma ORM.

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Andy Jessop

@AndyJessop33500

5 months

Twitter/X is so fickle. Throwaway comment with a head-blown emoji: goes viral, 1.1M views Article with 2 days' work and a lot of love: 🦗

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Andy Jessop

@AndyJessop33500

6 months

@housecor What's wrong with copy/pasted code?

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Andy Jessop

@AndyJessop33500

5 months

[Golang] What's the logic behind using the same operator for both the pointer declaration type and the dereferencing operator? Is it just because this is what's done in C/C++?

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Andy Jessop

@AndyJessop33500

5 months

Now *this* is mindblowing 🤯

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Andy Jessop

@AndyJessop33500

9 months

@BenLesh @angular This is mostly useless unless you provide an alternative or some context as to why/how this is expensive. For example, I just added this to my app and the app is fine - I can't detect anything in the timeline that hints at worse performance.

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Andy Jessop

@AndyJessop33500

2 months

I've been reading a lot of @CloudflareDev blogs recently, and as you probably know they have a lot of technical and usually nuanced content. I have found that putting the blog content through an LLM prompting for an ELI5 has been a huge help to gain better understanding.

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Andy Jessop

@AndyJessop33500

5 months

At what point does @bunjavascript start consolidating? There are lots of features that are not complete, or have many bugs. I get that initially it's a bit of a land-grab, but it would be good to know when the consolidation will happen. I would have thought v1 was the catalyst.

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Andy Jessop

@AndyJessop33500

5 months

@gurtsquared Ok, hear me out. SaaSaaS.

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Andy Jessop

@AndyJessop33500

5 months

@bunjavascript Bun are building Ronaldo, the API that is insanely effective for 8 years, then gets career-ending injuries while milking its past greatness.

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Andy Jessop

@AndyJessop33500

4 months

🤯 Claude is *seriously* good at code. I built a bot that modifies its own code in response to prompts, so you can build it up iteratively. So far, it's been pretty much flawless - the accuracy is astounding 🎯 The bot takes the prompt, and the existing code, then generates new

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Andy Jessop

@AndyJessop33500

5 months

[Golang] I'm really enjoying learning about goroutines and channels. Here's a quick implementation of the Producer-Consumer pattern, using an unbuffered channel to send values to the consumer one-by-one. Channels are unbuffered by default, which means that the producer blocks

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Andy Jessop

@AndyJessop33500

4 months

@DanielW_Kiwi I feel like it's 50% of the time useful and 50% annoying, but the 50% annoying is disproportionately negative.

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Andy Jessop

@AndyJessop33500

5 months

@hot_girl_spring @marksanborn I don't think this is quite a tuple. These are distinct values returned. I know in practical terms it's extremely similar, but I was just interested that this multiple return is baked into functions in Go.

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Andy Jessop

@AndyJessop33500

4 months

Can you guess what I'm building tonight? @ritakozlov_ @CloudflareDev

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Andy Jessop

@AndyJessop33500

5 months

@EisenbergEffect Ah no, it's a "React Server Component Payload". It only *looks* like JSON.

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Andy Jessop

@AndyJessop33500

4 months

@bunjavascript One example of this is module resolution. This the primary pain point I've had with Node projects over the years, and it simply evapourates with Bun. You will never see this again: SyntaxError: Unexpected token import

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Andy Jessop

@AndyJessop33500

5 months

Trying this little critter next. Good move?

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Andy Jessop

@AndyJessop33500

1 month

I think I've got a problem. I can't stop building RAG side projects with @CloudflareDev Vectorize.

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Andy Jessop

@AndyJessop33500

6 months

@bunjavascript That's 43.31% until I can finally tell my coworkers we're switching to Bun.

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Andy Jessop

@AndyJessop33500

5 months

My first impressions of golang are that it's really easy to read and fast to pick up. But I suppose that's news only to me at this point.

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Andy Jessop

@AndyJessop33500

5 months

@EskilSteenberg I'm not too familiar with C, but it looks like output is a single value.

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Andy Jessop

@AndyJessop33500

5 months

@GergelyOrosz Use a robust runtime feature flag system to enable all devs to ship quickly but have the confidence that they can also do immediate rollbacks if there is an issue.

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Andy Jessop

@AndyJessop33500

4 months

What will happen here? 1) Blocks the main thread for 5 seconds. 2) Blocks the main thread until the heat death of the universe. 3) Never blocks the main thread.

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Andy Jessop

@AndyJessop33500

5 months

@thdxr Plot twist: GPT 5 is basically what GPT 4 uses to be before they dumbed it down and made it lazy. No more big leaps will happen until a better architecture appears or an extra order or magnitude of compute.

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Andy Jessop

@AndyJessop33500

1 year

@housecor @dahlbyk @kc_dc The difference is syntactic. Ultimately they're doing the same thing. Whether I write class="m-0.5" or syle="margin: 2px" they're still just inline styles. Ok one is shorter than the other, but they're still doing the same job in the same way.

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Andy Jessop

@AndyJessop33500

5 months

@passle_ Can't argue with that. Apple are very much anti-web at this point.

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Andy Jessop

@AndyJessop33500

4 months

Who invited Devin to the party? Things were going so well.

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Andy Jessop

@AndyJessop33500

4 months

Thoughts on the styling/branding?

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Andy Jessop

@AndyJessop33500

8 months

@syntaxfm Slow front-ends are mostly caused by waterfall requests caused by components initiating the resolving of their data.

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Andy Jessop

@AndyJessop33500

5 months

I've never been one to grind Leetcode, but I've got to say that it's pretty handy for learning a new language. So much of learning a new language is about getting comfortable manipulating primitives and doing basic algorithmic work. Leetcode gives you a nice structured path to

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Andy Jessop

@AndyJessop33500

5 months

@Dominus_Kelvin That's not "SPAs" - it's just broken configuration.

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Andy Jessop

@AndyJessop33500

2 months

No coding today. Just learning and note-taking.

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Andy Jessop

@AndyJessop33500

4 months

@jarredsumner Bug fixes? 😁

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Andy Jessop

@AndyJessop33500

6 months

@housecor I like the "add a comment with link to ticket" approach. Same for flaky tests - comment it out, but ticket to fix it with high priority.

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Andy Jessop

@AndyJessop33500

6 months

@jarredsumner Aliases should be up to the user. We all have our typing idiosyncrasies.

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Andy Jessop

@AndyJessop33500

4 months

I made this handy script that will concatenate all files in a folder so that they can be provided to an LLM as context. Usage is like this: bun ./scripts/concatenate.ts /some-folder/ concatentated.txt

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Andy Jessop

@AndyJessop33500

5 months

@chancethedev Not sure I actually _enjoy_ it, but I have internalised separation of concerns, and TW just....isn't that.

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Andy Jessop

@AndyJessop33500

6 months

@mattpocockuk I don't know what to believe anymore. Might as well give this up and start beekeeping.

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Andy Jessop

@AndyJessop33500

4 months

I think I've finally found a good use for AI. It's a tool that runs on pre-commit and just ensures that all code comments start with a capital letter, end with a full stop, and surround any variable name with backticks.

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Andy Jessop

@AndyJessop33500

5 months

@JoshWComeau Oh! So THAT's what I've been doing accidentally all this time. Seems very useful if done deliberately 😁

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Andy Jessop

@AndyJessop33500

5 months

@wagslane That's exactly the spirit. It's just that most of your other comments do not seem to support that.

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Andy Jessop

@AndyJessop33500

9 months

@rauchg @nextjs The ironic thing here is that you will get just the same with NextJs if you have data fetching within your components. Checkout Supabase's dashboard as an example. Loading speed is so rarely to do with the framework, and everything to do with the architecture.

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Andy Jessop

@AndyJessop33500

5 months

@nixcraft @mSykeCodes I thought these were brackets

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Andy Jessop

@AndyJessop33500

3 months

@jarredsumner The other tooling I've built around package.json will fail before my editor sees it, so this is a breaking change that I will have to deal with. When my tools read JSON, I expect it to be JSON. Please don't do this.

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Andy Jessop

@AndyJessop33500

3 months

@Cloudflare Here's the full text:

A prompt to categorise and analyse sentiment for GitHub issues

A prompt to categorise and analyse sentiment for GitHub issues - prompt.txt

gist.github.com

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Andy Jessop

@AndyJessop33500

9 months

@BenLesh @angular I think we're now digging into the nuanve that was emphatically absent from your original tweet. Will this kill performance? No. Will this pattern be present in any given app even if the dev is unaware of the performance hit? Unlikely - more likely it will never be an issue.

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Andy Jessop

@AndyJessop33500

5 months

@HenryAkely @TomSmallwood Despite everyone's protestations in this thread, it seems that all the examples given have been returning single values which are then deconstructed. (Lua excepted).

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Andy Jessop

@AndyJessop33500

6 months

@bunjavascript I have an advent calendar for it. Day 1: Surprise blue screen of death. Day 2: Finding a feature that was available in the previous version but is somehow missing now. Day 3: Finding a feature that was available in the previous version but is somehow missing now. Day 4: The

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Andy Jessop

@AndyJessop33500

5 months

@rafaelmuttoni @Cloudflare Just side projects.

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Andy Jessop

@AndyJessop33500

9 months

@ThePrimeagen Genuine question: what's the overlap between vim users and DnD players?

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Andy Jessop

@AndyJessop33500

5 months

@blinklabs_io I upgraded React to version 18 and my office burned down.

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Andy Jessop

@AndyJessop33500

4 months

I just reviewed a 1500 line React component with 15 useStates and 18 useEffects. How's your day going?

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Andy Jessop

@AndyJessop33500

5 months

[Golang] I just discovered goroutines and have been taking a deeper look. My first impressions are simple and lightweight, but really powerful. This language continues to impress me ✅ Write-up blog post in thread 🧵 👇

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Andy Jessop

@AndyJessop33500

5 months

Here's the post! Enjoy, and please do let me know what you think!

Building a Terminal-based Chatbot in Rust from Scratch

Introduction This is going to be a learning experience for me, and I hope it will be for...

dev.to

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Andy Jessop

@AndyJessop33500

4 months

@arnaudbezancon @bunjavascript Deno is definitely the pioneer, but the URL imports only adds a layer of complexity, whereas Bun takes it away.

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Andy Jessop

@AndyJessop33500

4 months

I built a tool that builds other tools, by using the tool it built to build itself. Yeah, my head's spinning too, but this was great fun! Check it out - the code is 99% generated by Claude from @AnthropicAI . I'll write a blog about the process in a few days.

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Andy Jessop

@AndyJessop33500

4 months

@mariusdotdev @jarredsumner That would be cool. I like Biome and use it, but tsconfig is still a pain. If Bun could remove that pain it would be a massive DX win.

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Andy Jessop

@AndyJessop33500

4 months

Anyone got any downsides to switching over to Biome for linting and formatting? Just seems so simple compared to ESLint/Prettier. I have this, and it just sort of...works.

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Andy Jessop

@AndyJessop33500

4 months

Met some amaaaazing people today. Tech industry is the best industry 😊

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Andy Jessop

@AndyJessop33500

4 months

@dailydotdev Either @supabase or @Cloudflare D1, depending on the project.

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Andy Jessop

@AndyJessop33500

7 months

@ianmiell An if statement is in code, which needs to be PR'd, reviewed, deployed. A feature flag is generally a runtime if statement, which can be switched instantly.

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