rbitr

program pretokenize

        character(:), allocatable :: result, orig
        character(:), dimension(:), allocatable :: c_encoding
        integer :: j
        
        c_encoding = make_encoding()
        

        result = pre_tokenize('Andy99아마')

rbitr

The following assembly code counter.asm counts to 10^9, using a linux system call to print:

section .data
    count dd 0          ; Define a 32-bit integer for the count

section .text
    global _start

_start:

rbitr

##tempering expectations for generative AI

Originally posted here: https://www.linkedin.com/pulse/tempering-expectations-generative-ai-andrew-marble/

There's a software development concept called low code programming - idea is that you could automate away lots of the boilerplate for common coding tasks, so as to minimize the code written, often by drawing a picture or writing some other kind of specification instead. Turns out it works great for about 95% of the programming tasks you'd want to do, but makes the other 5% more complex or impossible because it doesn't fit nicely in the low-code template so you need to hack around it. And unfortunately, this 5% is present in pretty much every real software project, and is what takes all the work. That's why despite the time that's passed since the first low code tool was developed (it was called COBOL) most software is still written in fully featured programming languages, and low code is only used in niche areas. Enter the new "low code" revolution. There's be

rbitr

Here I compared the effect of different compiler optimizations in both Fortran and C for a program that multiplies a matrix with a vector. The results are below.

Options	C (loop)	Fortran (intrinsic)	Fortran (loop)
	828 ms	104 ms	835 ms
-Ofast	110 ms	112 ms	110 ms
-O3	362 ms	361 ms	363 ms
-O3 -march=native	362 ms	363 ms	361 ms
-O3 -march=native -ffast-math -funroll-loops	90.3 ms	92.8 ms	89.5 ms
-O3 -march=native -ffast-math -funroll-loops -fopenmp	85.2 ms	91.2 ms	86.4 ms

rbitr

Random numbers in bash et al

There is a variable $RANDOM than you can read in bash or zsh to get a random number beteen 0 and 32767. Here in zsh on my (old) mac:

% echo $RANDOM
13757
% echo $RANDOM
16896