/prog/ - Ever wonder why software is so slow...?

Name: Cudder !cXCudderUE 2017-09-04 4:18

Because it's all written by retards.

https://github.com/ArtifexSoftware/jbig2dec/blob/master/jbig2_image.c

Scroll down to jbig2_image_compose_unopt()... and then facepalm. It doesn't take a genius to realise that twiddling an image pixel-by-pixel is going to be dead slow.

Name: Cudder !cXCudderUE 2017-09-09 0:15

>>39,40
I just browsed the site for some popular and large image-ful PDFs.

Name: Anonymous 2017-09-09 1:08

>>1
So, why didn't you submit an issue/pull?

Name: Anonymous 2017-09-09 1:39

>>42
Complaining is easier.

Name: Cudder !cXCudderUE 2017-09-09 3:14

>>42 see >>26

Name: Anonymous 2017-09-09 22:37

>>44
This isn't the repo.
How is this pointing it to their attention?

Name: Anonymous 2017-09-10 2:14

>>45

Distributing the binary is probably against several licenses

Learn to read.

Name: Anonymous 2017-09-10 19:03

>>46
What does that have to do with my question?

Name: Anonymous 2017-09-10 22:42

>>47
Learn to think.

Name: Anonymous 2017-09-11 3:02

>>48

_>

Name: Anonymous 2017-09-11 18:44

>>26
Now that you've finished this project, cudder-sama, what's the next step of your master plan?

Name: Anonymous 2017-09-12 3:51

>>50
The disassembler

Name: Anonymous 2017-09-12 6:31

>>40
not impressive, just not something I thought riders would be interested in tbh
>>51
with no survivors

Name: Cudder !cXCudderUE 2017-09-12 9:37

>>50
It's not really finished. There is none. I have a ton of other stuff to do.

Name: Anonymous 2017-09-13 6:25

>>26
What happened to your "1 space per indentation level" style?

Name: Anonymous 2017-09-13 7:07

what happened to your "dubs" style?

Name: Anonymous 2017-09-13 20:58

>>54
maybe it's for the better, because that was awful.

Name: Anonymous 2017-09-15 23:05

>>54
I remember that. It was the recommended style for anoncoreutils.

Name: Cudder !cXCudderUE 2017-10-24 2:11

https://archive.org/download/JBlakeboroughAndSonsLtdCCA15302/J%20Blakeborough%20and%20Sons%20Ltd%20-%20CCA15302_text.pdf

Time how long it takes to render each page.

JPEG2000 has impressive compression ratio as well as CPU usage.

Name: Anonymous 2017-10-24 2:40

>>58
Maybe 5 seconds with pdf.js

Name: Cudder !cXCudderUE 2017-10-25 10:54

It takes ~2s on 8-year-old hardware after the optimisations discussed in this thread.

It takes closer to 5 seconds without.

Name: Anonymous 2017-10-25 10:55

>>60
that's fine, I'm in no rush

Name: Anonymous 2017-10-26 11:33

>>1

Actually, you have to set these pixels at some stage. Cudder, you're stupid. And modern software is slow, because it uses garbage collected languages, like Ruby and Python, and useless crap, like utf32 strings, instead of plain ASCII.

Name: Anonymous 2017-10-26 11:35

>>62
explain why >>26 is so faster then

Name: Anonymous 2017-10-26 11:35

>>62

BTW, old ZX Spectrum and DOS software drawn pixel by pixel, and took minuscule memory and CPU time by modern standards, without any help from GPU.

Name: Anonymous 2017-10-26 11:38

>>63

Just avoid using C++, otherwise you calls would go through an endless abstraction chain. Plain C is just faster, especially because it forces you to allocate all resources in advance, without these unpredictable RAII smart pointers.

Name: Anonymous 2017-10-26 14:39

>>65
So?
Her patches still worked.

Ever wonder why software is so slow...?

1 Name: Cudder !cXCudderUE 2017-09-04 4:18

41 Name: Cudder !cXCudderUE 2017-09-09 0:15

42 Name: Anonymous 2017-09-09 1:08

43 Name: Anonymous 2017-09-09 1:39

44 Name: Cudder !cXCudderUE 2017-09-09 3:14

45 Name: Anonymous 2017-09-09 22:37

46 Name: Anonymous 2017-09-10 2:14

47 Name: Anonymous 2017-09-10 19:03

48 Name: Anonymous 2017-09-10 22:42

49 Name: Anonymous 2017-09-11 3:02

50 Name: Anonymous 2017-09-11 18:44

51 Name: Anonymous 2017-09-12 3:51

52 Name: Anonymous 2017-09-12 6:31

53 Name: Cudder !cXCudderUE 2017-09-12 9:37

54 Name: Anonymous 2017-09-13 6:25

55 Name: Anonymous 2017-09-13 7:07

56 Name: Anonymous 2017-09-13 20:58

57 Name: Anonymous 2017-09-15 23:05

58 Name: Cudder !cXCudderUE 2017-10-24 2:11

59 Name: Anonymous 2017-10-24 2:40

60 Name: Cudder !cXCudderUE 2017-10-25 10:54

61 Name: Anonymous 2017-10-25 10:55

62 Name: Anonymous 2017-10-26 11:33

63 Name: Anonymous 2017-10-26 11:35

64 Name: Anonymous 2017-10-26 11:35

65 Name: Anonymous 2017-10-26 11:38

66 Name: Anonymous 2017-10-26 14:39

Name: Cudder !cXCudderUE 2017-09-04 4:18

Name: Cudder !cXCudderUE 2017-09-09 0:15

Name: Anonymous 2017-09-09 1:08

Name: Anonymous 2017-09-09 1:39

Name: Cudder !cXCudderUE 2017-09-09 3:14

Name: Anonymous 2017-09-09 22:37

Name: Anonymous 2017-09-10 2:14

Name: Anonymous 2017-09-10 19:03

Name: Anonymous 2017-09-10 22:42

Name: Anonymous 2017-09-11 3:02

Name: Anonymous 2017-09-11 18:44

Name: Anonymous 2017-09-12 3:51

Name: Anonymous 2017-09-12 6:31

Name: Cudder !cXCudderUE 2017-09-12 9:37

Name: Anonymous 2017-09-13 6:25

Name: Anonymous 2017-09-13 7:07

Name: Anonymous 2017-09-13 20:58

Name: Anonymous 2017-09-15 23:05

Name: Cudder !cXCudderUE 2017-10-24 2:11

Name: Anonymous 2017-10-24 2:40

Name: Cudder !cXCudderUE 2017-10-25 10:54

Name: Anonymous 2017-10-25 10:55

Name: Anonymous 2017-10-26 11:33

Name: Anonymous 2017-10-26 11:35

Name: Anonymous 2017-10-26 11:35

Name: Anonymous 2017-10-26 11:38

Name: Anonymous 2017-10-26 14:39