Viewing profile — aqrit

>Is it really that difficult? Fiberglass handles are now standard on splitting mauls (for this reason). Rotten hearts, or driving wedges. It is easy to miss a swing by an inch or t…

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_Daily_ hit pieces on Elon Musk (or Musk companies), going for something like a decade. These have petered out somewhat since he left DOGE. But they started way back before he shou…

MS makes "Times New Roman" available (at no cost), but not "Calibri".

`_mm_alignr_epi8` is a compile-time known shuffle that gets optimized well by LLVM [1]. If you need the exact behavior of `pshufb` you can use asm or the llvm intrinsic [2]. iirc, …

> health services in the area Massena Hospital is a 25-bed hospital. Might have to go to Canton or Ogdensburg for a family doctor (45 minutes by car). Most things serious get refer…

Alcoa (Aluminum Smelter, *cheap electricity*) was the major industry in the area. Massena plant now produces 85% less aluminum compared to ~15 years ago (AFAICT), leading to someth…

Limited internet connections (speed and/or data-caps). Something like Hughesnet (satellite ISP) couldn't stream more than 240p from youtube during peek times. The data-cap coerced …

> “regular” rejection sampling I was thinking naive: mask off unwanted bits then reject any value above the limit. It would seem like https://c-faq.com/lib/randrange.html would als…

A optimized version would use 64-bit accumulators (`psadbw` on SSE2, or some sort of horizontal adds on NEON). The `255` max constraint is pointless. Many programming languages/fra…

Why not use regular rejection sampling when `limit` is known at compile-time. Does fastrange[1] have fewer rejections due to any excess random bits[2]? [1] https://github.com/lemir…

That snippet would not reject bad chars, are non-digits rejected somewhere else? A simple scalar loop that multiplies an accumulator by 10, itoa() style, would be faster.

The methods in those articles could be slightly improved by picking better multipliers. https://stackoverflow.com/a/71594769

There are two digits for months. A check is required per-character to prevent bad chars (e.g 0x3A) from being laundered by the multiply. The '19' comes from fact that the first dig…

This was for a super optimizer.

One of the authors/contributors was looking into it: https://old.reddit.com/r/mainframe/comments/wevyvg/whats_the... I don't think this project was ready for a public announcement,…

The AVX2 version is using a 8 KiB table...? Even the range check is inefficient. I'd bet that the AVX2 version could be 50% faster.

related to IEEE 754 double-precision floating-point round-trips?

Any fine shows Walmart as liable. A free win for any $100mm civil lawsuit.

https://media.ccc.de/v/35c3-9788-memsad

www.central-boiler.co.uk ?

Outdoor wood furnaces (boilers) became very popular over the last 15 years. They are cheaper than fuel oil. A traditional wood stove has to be refilled every 2 hours (or so), and i…

The algorithm used by ClickHouse was "inspired" by https://github.com/cyb70289/utf8/ ... Which is known to be slower than this new method from simdjson.

here you go: https://github.com/expr-fi/fastlwc "Beating wc with C"