Serpent7776

joined 1 year ago
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crawlio: Tool that slows down I/O operations in c/commandline
[–] Serpent7776 1 points 20 hours ago

AFAIK you can't do this with BPF as it doesn't have any kind of sleep functionality. I'm also not sure how would you achive this using cgroup, which are about quotas AFAIK.

crawlio: Tool that slows down I/O operations in c/commandline
[–] Serpent7776 0 points 1 day ago

There is?

17
crawlio: Tool that slows down I/O operations (github.com)
submitted 2 days ago by Serpent7776 to c/commandline
5 comments fedilink
 

Crawlio is a simple C tool that slows down I/O operations by adding a specified amount of time to each I/O call. It uses LD_PRELOAD.

  • Test application behaviour under slow I/O conditions
  • Bring back the dial-up nostalgia
  • Learn how to use LD_PRELOAD
2
My first x86 avx program: fizzbuzz using AVX512 (github.com)
submitted 3 months ago by Serpent7776 to c/asm
0 comments fedilink
8
pg_worker_pool: extension creating a pool of background workers (github.com)
submitted 5 months ago by Serpent7776 to c/postgresql
0 comments fedilink
 

I'm doing an extension that creates a pool of named background workers. Happy to hear any feedback on this.

CREATE EXTENSION pg_worker_pool;
CALL worker_pool.submit('foo', 'create index myindex_1 on my_big_table (id)');
CALL worker_pool.submit('foo', 'create index myindex_1 on my_big_table (name)');
CALL worker_pool.submit('bar', 'create index otherindex_2 on other_big_table (author)');
CALL worker_pool.submit('bar', 'create index otherindex_2 on other_big_table (title)');

This will start two background workers, foo and bar. foo will create an indices on table my_big_table and bar on table other_big_table. foo and bar will run independently of each other, but all indices submitted to the same worker will be created in order.

8
Comparing C++ range libraries for filter+reverse case with non-trivial lambda (dev.to)
submitted 10 months ago by Serpent7776 to c/cpp
0 comments fedilink
 

I wrote a blog post comparing several range libraries for a case that is doing filter with non-trivial lambda and then reverse.

I used hyperfine CLI tool to measure startup and shutdown times of several code interpreters in c/commandline
[–] Serpent7776 1 points 11 months ago

I added bun and deno. Updated results are on the github page. Deno is similar to node, bun takes much less time.

https://github.com/serpent7776/startup-shutdown-bench

10
I used hyperfine CLI tool to measure startup and shutdown times of several code interpreters (dev.to)
submitted 1 year ago by Serpent7776 to c/commandline
2 comments fedilink
 

A blog post shows an example usage of hyperfine CLI tool to measure and plot time of startup and shutdown of several code interpreters.

8
Programming Language Awareness Centre (www.math.bas.bg)
 

A Programming Language Learner's Resource. Contains descriptions of many ineresting programming languages, like APL, ABC, FP, Factor with examples and further links.

Index arrays with ordinals instead of integers with custom literals in c/cpp
[–] Serpent7776 2 points 1 year ago (1 children)

It should be easy to edit the existing code to add support for i18n, but there's probably no way to make in generic (except for macros).

Index arrays with ordinals instead of integers with custom literals in c/cpp
[–] Serpent7776 10 points 1 year ago

Yeah, that was basically it.

Index arrays with ordinals instead of integers with custom literals in c/cpp
[–] Serpent7776 14 points 1 year ago (1 children)

There's no purpose really. It was more of "wonder if I can" and also nice way to learn custom literals.

19
Index arrays with ordinals instead of integers with custom literals (programming.dev)
submitted 1 year ago by Serpent7776 to c/cpp
11 comments fedilink
 

I did a code that uses custom literals to allow indexing arrays with ordinals (1st, 2nd, 3rd), all at compile time. Additionally _st works only with 1, _nd only with 2, _rd only with 3. Zero and negative numbers are also not supported and fail compilation.

https://github.com/serpent7776/bits/blob/master/th.cpp/th.cpp

9
The performance cost of pl/pgsql exception block in Postgres (dev.to)
submitted 1 year ago by Serpent7776 to c/postgresql
0 comments fedilink
5
histat - a simple history stats (github.com)
submitted 1 year ago by Serpent7776 to c/commandline
0 comments fedilink
 

I created a very simple script that shows the history usage of your shell. Should work with bash and fish shells.

This basically goes through the history and counts the command names. So all of git push, git pull, etc will count as just git.

Example output:

    847 pacman
    296 cd
    206 git
    203 time
    180 vim
    172 awk
    166 aur
    142 strace
    141 cat
    125 ls
Total commands:  7008
Unique commands: 753
ifn't in c/programmer_humor
[–] Serpent7776 2 points 1 year ago

I can actually define this in TCL:

% proc ifn't {cond cmds} {if {!$cond} {uplevel $cmds}}
% ifn't false {puts 12}
12
% ifn't true {puts 12}
%