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Mastodon @danderson@hachyderm.io

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Followers

3.9K

Account age

3 yrs

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Known for

13 views I am adding a completely normal amount of trait bounds to the fearless_simd crate, be not afraid

I mean look at this nonsense. The function does bitpacking of integer types, as long as the scalar's bit width is a clean multiple of the packed width (e.g. pack 16b values into 1 bit/value, or 2 bits/value, or 4 bits/value, ...). The function is generic over vector types, so can pack 8/16/32/64-bit integers, using 128/256/512 bit simd vectors. Due to the layout of the packed words, the loop over

3 views I mean look at this nonsense. The function does bitpacking of integer types, as long as the scalar's bit width is a clean multiple of the packed width (e.g. pack 16b values into 1 bit/value, or 2 bits/value, or 4 bits/value, ...). The function is generic over vector types, so can pack 8/16/32/64-bit integers, using 128/256/512 bit simd vectors. Due to the layout of the packed words, the loop over

📊 Post engagement

📊 Activity & format

Posting cadence

9.3 / week

Toots daily — consistently active for a campaign window.

Content mix

Mostly text

Recent: 10 text · 2 image · 0 video.

Follower / following

9.4×

Follows 416 back. A strong ratio — an audience that follows them, not a follow-for-follow network.

Recent posts

View on Mastodon ↗

🔥 Top post modern compiler optimizers are quite impressive. It's very silly that it can take my piece of code that's doing a two-level iteration over a pair of arrays of different sizes, with parts of the iteration running backwards for reasons, and somehow turn it into a tight loop of a d… ★ 13

I'm apparently in whatever phase of life contains discovering minesweeper strats and playing a bunch of games because it's kind of a cool logic puzzle it turns out ★ 7 I've just remembered that XMoto exists, and I'm a little bit happier than I was a moment ago. It has no business being as fun as it is. ★ 2

I mean look at this nonsense. The function does bitpacking of integer types, as long as the scalar's bit width is a clean multiple of the packed width (e.g. pack 16b values into 1 bit/value, or 2 bits/value, or 4 bits/value, ...). The func… ★ 3 If you're wondering wtf is going on, turns out this is what you have to write down to say "this trait is any primitive integer, and with it you can do stuff that all the primitive integer types can do". Yes, it's very silly. But also yes, … ★ 7 Oh and also that first bound on SimdElement pulls in another 34 additional trait bounds. BE NOT AFRAID ★ 4

I am adding a completely normal amount of trait bounds to the fearless_simd crate, be not afraid ★ 13 The simple joy of setting up a new workstation, using ublock to once again make youtube shorts and upsells and recommendations and themed events fuck all the way off to the top of Fuck Off Mountain, since the only other option is "show les… ★ 12 Finally also getting some sensible bench numbers when I toggle between vector ISAs now. SSE2 and SSE4.2: ~100GB/s AVX2: ~150GB/s AVX512: ~200GB/s The simd kernel is using only pretty simple instructions (and, shift, or, a few splats), so I… ★ 3 it's actually quite silly, now that I look at the numbers. The packer runs in 2.66ns, which is around 10-15 cycles on this CPU if I'm measuring right. So that's 30-50 ~feral hogs~ u8s encoded per cycle on average. That is an extremely sill… ★ 5 That's still a ways off from even the L2 cache's max throughput on this machine, so I suspect this means I'm limited by the availability of vector units and/or data dependencies limiting ILP. Still, bit twiddling at a couple hundred gigs/s… ok the interaction between the simd dispatch! macro and the criterion benchmarking machinery is just incredibly fucking fragile. If I do anything other than directly call my simd function within the body of dispatch!, the additional indire… ★ 3

🐘 Community & instance

Home server

hachyderm.io

A tech & engineering server — its members and audience skew toward that niche, so expect a community-aligned, engaged following.

✅ Link-verified

Verified link

Proved ownership of a website linked on their profile — Mastodon's green-check verification, a real identity signal rather than a paid badge.

On Mastodon since

Nov 2022

Joined in the Twitter-exodus wave of late 2022 — part of the migration that made Mastodon a real destination.

💡 Facts

🗓️Joined Mastodon in 2022 — 3 years ago.

👁️Averages 7 views per post.

📤Posts about 9.3× per week.

🕵️ Fake follower check

Estimated

52/100

Fair Credibility score

76%

Mixed Real audience

Medium Fake-follower risk

High Data confidence

Est. 76% real, active audience · Medium fake-follower risk.
Low engagement (~0.2% of followers engage each post) — a sign of an inflated or inactive audience.
Verified account.
Established account (3+ years old).

Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.

About

Software developer by day, other kinds of nerd the rest of the time. ADHD says current hobbies are 3D printers, building CNC machines, old computers in space, and general shitposting on whatever grabs my interest. Nazis, TERFs, other terrible people: please go away, there's nothing for you here. Follow reqs welcome from humans and other sentient entities. Please have at least some evidence of same in your profile!

🔀 Audience overlap

Estimated

Estimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.

John Conway 18%

FAIR 15%

Rob Ricci 12%

Diligence Jones 12%

Jacquelyn Gill 12%

Rob Ricci 10%

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📊 Activity & format

Recent posts

🐘 Community & instance

💡 Facts

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🔀 Audience overlap

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