Ben Joffe

Software developer.
Date & time enthusiast.
Probate specialist.

[Ben Joffe @benjoffe]

A new datetime blog post is up! This time, low-level algorithms for computing the day-of-the-week, around 2-3x faster than usual:

https://t.co/9oqGLySuNH

[Ben Joffe @benjoffe]

@sharifelkomi @evanbuhler @paulg This is actually not true.

You are thinking of "median", not average.

[Ben Joffe @benjoffe]

@memecrashes Finite new guests (K) can fit by making everyone move from their room "n" to min(n*2, K + n).

This will fit all the new guests and involve the same or less moving than the infinite case.

[Tim Culverhouse @rockorager]

Replaced the civilFromDays algorithm in zeit with @benjoffe's new one. 5.3x faster than the previous one I had used (Hinnant) on my M4. 💪

[Ben Joffe @benjoffe]

A faster full-width is-leap-year function:
https://t.co/dPx2PUQoZs

[Ben Joffe @benjoffe]

@djdlc_1895 Hi! Compilers are not always very clever, but fortunately they are able turn those into bit-shifts. There's also a `* 512` term that compiles to `<< 9`.

[Ben Joffe @benjoffe]

Counting dates backwards for a 30-40% speed gain:
https://t.co/wSus9jnm2q

[Ben Joffe @benjoffe]

@reductor I don't have a usecase for it. I did this purely for the fun of it.
There are many niche usecases, such as high frequency trading, as well as in databases when "bad" queries are made like "select * where month(created_at) = x".

[Ben Joffe @benjoffe]

New Fast Date Algorithms Part 2 - Overflow Safe
https://t.co/b0g6268tNc

[Ben Joffe @benjoffe]

A New Faster Algorithm for Gregorian Date Conversion
https://t.co/WIaLSJp9Q6

[Abraham Joffe ACS @Abrahamjoffe]

Trade Secret | OFFICIAL TRAILER https://t.co/GeVNOUM7XQ via @YouTube

[Ben Joffe @benjoffe]

I have published a new paper:
The Smoital System — A method of timekeeping on Mars based on UTC
https://t.co/K5ysXKoI47

[Ben Joffe @benjoffe]

Check out my new Web App:
https://t.co/0hWMcS1UJb
It teaches you to easily calculate the day of the week for any date.
It includes a daily game, my result for Day 1:
⭐⭐⭐
🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩🟩
Streak: 1️⃣
Perfect Streak: 1️⃣
#weekle

[The Elite @theelitedotnet]

GreasePig has created an animated history video for all the champions and top 10 throughout history in Perfect Dark, give it a watch! https://t.co/fkkYId8kgS

[Ben Joffe @benjoffe]

Kicking off a new YouTube series, video game speedrunning history visualisations:

https://t.co/qNj43VVj5m

[Sam Altman @sama]

Love these charts:

[Stewart Brand @stewartbrand]

Long data tells even more than big data.

Time is longer than it is wide.

Diachronic versus synchronic.

https://t.co/XoNK0AktaU

[Steam Spy @Steam_Spy]

The number of new games on Steam by month

[Mike Lawler @mikeandallie]

@MrHonner @benjoffe We once insured a $100 million prize in a poker tournament. Probably good that I read this article well afterwards :)

[Patrick Honner @MrHonner]

Can you stack a deck so that no matter where the cards are cut the dealer wins? Yes! @benjoffe shows how: https://t.co/10tLTaPteM