Jason McGhee

CTO / co-founder @ (acq by @Contentful) | prev co-founder Cursor Data (acq by @DataRobot) | UX, ML, Productivity, Personalized Education

[Jason McGhee @_jason_today]

Wrote an interactive blog post about global illumination. There’s a surprise if you make it to the end. Also posted on Show HN if you want to join the discussion!

https://t.co/nYJBRwlMGs

[Jason McGhee @_jason_today]

On the shoulders of giants (hall of fame HN post) https://t.co/0ImPxHNEWE

[Huy @quanghuynt14]

So I gave Fable 5 the watchmaker benchmark: a full Swiss lever movement in Three.js. Real gear ratios (18,000 bph), working escapement, breathing hairspring — and the hands tell actual time. It verified its own work with vision, in a loop, until done. ⌚

[Jason McGhee @_jason_today]

@ivanfioravanti In my experience (m4 max) high power mode vs low power mode is roughly 1.5-2x throughput on a given workload (obviously varies). Low power mode dramatically extends battery life - especially for long running jobs / sustained use. It also says cool and silent.

[Jason McGhee @_jason_today]

@kimmonismus Am I crazy- why is the kerning so bad?

[Jason McGhee @_jason_today]

@zachlieberman Vanilla radiance cascades?

[Jason McGhee @_jason_today]

@hxiao Would love to see this coloration on a logarithmic scale. In my personal experience the Q8_0 is a significantly more stable and generally higher quality experience.

[Jason McGhee @_jason_today]

@claudeai This is a chart crime and incredibly misleading. Who on earth approved this?

[Jason McGhee @_jason_today]

@_annieversary This is a good idea. Even just panning is super interesting. Hadn't considered it.

Having a lot of fun with this recently too

[Jason McGhee @_jason_today]

I've been playing with this too- I've done the libghostty + sdf rendering of terminals, but I've been more interested in making this work in general for the entire OS

[Jason McGhee @_jason_today]

@draginol mhm

[Jason McGhee @_jason_today]

It's a canvas overlayed on a contenteditable pre.

[Jason McGhee @_jason_today]

All the demos I'm seeing are text moving all over the screen. But what about an editor with pixel perfect syntax highlighting? You can do it with only little effort on the web now.

[Cheng Lou @_chenglou]

My dear front-end developers (and anyone who’s interested in the future of interfaces):

I have crawled through depths of hell to bring you, for the foreseeable years, one of the more important foundational pieces of UI engineering (if not in implementation then certainly at least in concept):
Fast, accurate and comprehensive userland text measurement algorithm in pure TypeScript, usable for laying out entire web pages without CSS, bypassing DOM measurements and reflow

[Jason McGhee @_jason_today]

@ranman It's SF Mono. I hear comic sans is making a comeback though

[Jason McGhee @_jason_today]

It's a canvas overlayed on a contenteditable pre.

[Jason McGhee @_jason_today]

@its_bvisness Marketing is important. I'm impressed with the ability to get 2k stars in less than 24 hours

[Jason McGhee @_jason_today]

@LLMJunky Just saying there's nothing wrong with sandboxed playwright ;) plus you're spreading the good word of webmcp

[Jason McGhee @_jason_today]

@LLMJunky Yeah Playwright MCP supports this too, but you need to install a browser extension. Chrome-dev-tools MCP it just works https://t.co/wsJk4vsk0S

[Jason McGhee @_jason_today]

@LLMJunky Ok not always- a few years. But other front end automation tooling has been able to connect to existing chrome and electron instances for over a decade. It's great for testing.

[Jason McGhee @_jason_today]

@LLMJunky > Not some sandboxxed Playwright instance

It's literally a sandboxed playwright instance lol. Playwright has always been able to control your browser and electron apps.

[Jason McGhee @_jason_today]

@yiliush The compass is a great touch - might steal it

[Jason McGhee @_jason_today]

I heard doing weird text editor experiments is cool again

[Jason McGhee @_jason_today]

I dug up the sdf terminal rendering

[Jason McGhee @_jason_today]

I've been playing with this too- I've done the libghostty + sdf rendering of terminals, but I've been more interested in making this work in general for the entire OS

[Yilio @yiliush]

teams + tmux ftw 🙌