I write high performance code and oversee gradient descents. And work on games @ Valve.
Joined February 2012
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Pinned Tweet
3 Jan 2022
I don’t like blocking anyone on Twitter.
Everyone is entitled to their opinions and I don’t really like to dictate how they can or cannot express those opinions, or what channels they can use to give me feedback.
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Best analysis I’ve seen of subtick movement here, worth a read if you have concerns about movement.
reddit.com/r/GlobalOffensive…
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4 Nov 2023
Most (but not all!) of the problems around subtick movement right now stem from cl_showpos not understanding subtick.
It reports values on tick boundaries which makes them look inconsistent—because of course they do! The movement curves have been shifted to offset from a tick.
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4 Nov 2023
This is how I call it. Oh no am I calling it wrong in my games?
3 Nov 2023
Firebox is the blue circle, green is ninja, and the stack of boxes is triple.
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3 Nov 2023
Is it St Patty’s Day already?
2 Nov 2023
So there’s literal green sludge bubbling up from the ground next to World Trade Center right now
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John McDonald retweeted
30 Oct 2023
This owl stole a kid’s stick-horse toy and has been riding it around town in true Halloween spirit
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John McDonald retweeted
28 Oct 2023
Mike Pence should be forced to carry his Presidential campaign to term.
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29 Oct 2023
I do not follow college football, but I am watching the huskies play Stanford now and I have a couple questions:
- how can a team be 7-0 but ranked 5th?
- how can a team that is 7-0 struggle so much against a team that is 2-5?
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29 Oct 2023
100% this. This may matter, but it may absolutely not matter at all.
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27 Oct 2023
Again.
‘No Way To Prevent This,’ Says Only Nation Where This Regularly Happens bit.ly/49c79oE
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20 Oct 2023
What the hell. Just amazing.
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20 Oct 2023
I will surely regret this; let’s do it anyways.
I’ve worked on performance in video games for almost my entire career (two decades now!)
This thread is how I personally think about perf. 🧵
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20 Oct 2023
If you are getting 1000 fps but you drop 30 fps (to 970), that is much less bad than someone who gets 31 fps and drops 30 fps to 1 fps.
(Or said correctly: going from 1 ms per frame to 1.03 ms per frame is less bad than going from 32.2 ms per frame to 1000 ms per frame).
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20 Oct 2023
That’s it. Thanks for coming to my TED talk on how I, personally, think about performance.
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