Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #102416

Re: Why Python is slow

From "Chris M. Thomasson" <invalid@invalid.invalid>
Newsgroups comp.lang.c
Subject Re: Why Python is slow
Date 2017-01-24 17:11 -0800
Organization n/a
Message-ID <o68ts6$ru2$1@dont-email.me> (permalink)
References <9048e105-65e6-4e8c-a42f-b37e1d327246@googlegroups.com>

Show all headers | View raw

On 1/24/2017 10:22 AM, thunderbirdmember@gmail.com wrote:
>   Everyone saying that. And my neighbour is all upset
> about something getting out of the house and complaining.
> He doesn't like his car because he stuns it every time
> he gets in or out. He don't realise that he stuns his mind too.
> Obviously he wants a new car. But he is stuck here being a student.
>
>   Python is easy to write but is slow executing things.
> So how much slower Python is compared to C. Experiment
> was done on a nested loop of the same features in both
> languages with same number of iterations and same logic:
>
> loop.py    0.219s
> loop.pyc  0.314s
> loop.c	 0.088s
>
>   For some reason pre-compiled python object ran slower
> than interpreted script.
>

Python is slow? Na. Its really slow, check this encryption technique out:

http://pastebin.com/raw/QarNLfn3

the code can be run online here:

https://repl.it/languages/python3

Here is output I get:
_____________________________
Chris M. Thomasson 8/20/2016
Reverse Iteration Fractal Cipher (RIFC)
Pre-Alpha Version: 0.0.0
In-Memory Byte Level Version
File based version is on its way
=======================================================



rifc:(fskey:(z:(-0.74543+0.11301j), c:[(0.677+0.2j), (-0.21-0.751j), 
(-0.0505+0.64j)], p:[4, 3, 5], r_n:2, n_n:3, hmack:hmac_skey_123))


original_plaintext, length: 80
______________________________________________
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
______________________________________________


ciphertext, length 42
______________________________________________
(649570f4addd71f8465a1aae6bc069ad)
(-0.11375803457697138-1.0685502316737907j)
(-0.1271064825318161+0.8348680631162264j)
(-0.9465802124429011-0.021669884533826154j)
(-0.7683793642809116+0.6958660388088035j)
(0.5937917954594152-0.6008683998579958j)
(-0.7533194789312488+0.39279573375297633j)
(0.9810984207110482-0.43839063971027215j)
(-1.039143097151175-0.15115901672983173j)
(0.7552941655462698+0.7042558870593708j)
(0.5938010468211017-0.6008231139526502j)
(0.2126122046980469-1.0146096378069278j)
(0.37856866737404404-0.7605684110457657j)
(0.9295372961578942-0.4885019921643779j)
(-0.9640543176348764-0.4816314805474917j)
(-0.19708500547902755-1.0137109728834568j)
(0.4243656694906026+0.9458066919042333j)
(0.052185152554679315-1.098221625269841j)
(0.9810985036408469-0.43839057374342194j)
(-1.0391430971506979-0.15115901672972512j)
(-0.031309836473818055-1.1021924436646868j)
(-0.7808135227088581+0.5722218415520595j)
(0.29551062115523563-0.9218862187288588j)
(1.0385789703812078-0.3703169644273795j)
(-1.0579145569213564-0.31092049409975675j)
(-1.0579219374236202-0.3108226222073398j)
(-0.6063592901243277-0.5950686377316392j)
(-0.7433921825449539+0.7896292737442576j)
(0.9680828314689215-0.0038328827487418113j)
(-0.17735283400653407-1.0349925564489764j)
(0.6579656932503363+0.8904258084005204j)
(-0.7819581804746235+0.531538345099241j)
(-1.0579769955329617-0.31092166521569914j)
(-0.3553756068743595-0.8030576853535909j)
(0.5212491869064347+0.9510148875045729j)
(-0.9806923348335188-0.4631155061539714j)
(1.0630282214859044-0.17700286890207792j)
(0.9450504847946626+0.02960360510159556j)
(-0.271900126007064-0.9069476993246169j)
(1.0306518161405818-0.11132538948998363j)
(-0.1773525590460382-1.0349930792622632j)
(-1.0250025736043362-0.12585144749250654j)
(0.16015441483333054-1.0656960691185335j)

______________________________________________


decrypted_plaintext, length: 80
______________________________________________
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
______________________________________________

_____________________________

Try to encrypt a couple of hundred gigs with that!

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Why Python is slow thunderbirdmember@gmail.com - 2017-01-24 10:22 -0800
  Re: Why Python is slow Richard Heathfield <rjh@cpax.org.uk> - 2017-01-24 18:33 +0000
  Re: Why Python is slow Richard Heathfield <rjh@cpax.org.uk> - 2017-01-24 20:14 +0000
    Re: Why Python is slow luser droog <luser.droog@gmail.com> - 2017-01-26 10:13 -0800
    Re: Why Python is slow Tim Rentsch <txr@alumni.caltech.edu> - 2017-01-30 05:50 -0800
  Re: Why Python is slow bart4858@gmail.com - 2017-01-24 13:21 -0800
  Re: Why Python is slow BartC <bc@freeuk.com> - 2017-01-24 22:23 +0000
  Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-24 17:11 -0800
    Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-24 19:26 -0800
    Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-25 12:50 -0800
      Re: Why Python is slow BartC <bc@freeuk.com> - 2017-01-25 21:52 +0000
        Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-25 14:30 -0800
          Re: Why Python is slow BartC <bc@freeuk.com> - 2017-01-25 22:59 +0000
            Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-27 13:20 -0800
      Re: Why Python is slow DFS <nospam@dfs.com> - 2017-01-25 19:22 -0500
        Re: Why Python is slow "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-01-26 13:40 -0800
  Re: Why Python is slow David Brown <david.brown@hesbynett.no> - 2017-01-25 10:29 +0100
    Re: Why Python is slow gazelle@shell.xmission.com (Kenny McCormack) - 2017-01-25 10:38 +0000
    Re: Why Python is slow Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-26 06:44 -0800
      Re: Why Python is slow Richard Heathfield <rjh@cpax.org.uk> - 2017-01-26 15:00 +0000
        Re: Why Python is slow Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-26 17:23 +0000
          Re: Why Python is slow supercat@casperkitty.com - 2017-01-26 09:42 -0800
            Re: Why Python is slow Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-01-26 18:24 +0000
      Re: Why Python is slow David Brown <david.brown@hesbynett.no> - 2017-01-26 16:14 +0100
        Re: Why Python is slow Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-01-26 12:49 -0800
          Re: Why Python is slow Robert Wessel <robertwessel2@yahoo.com> - 2017-01-26 15:11 -0600
          Re: Why Python is slow David Brown <david.brown@hesbynett.no> - 2017-01-26 23:56 +0100
        Re: Why Python is slow Keith Thompson <kst-u@mib.org> - 2017-01-26 15:20 -0800
          Re: Why Python is slow David Brown <david.brown@hesbynett.no> - 2017-01-27 09:31 +0100
      Re: Why Python is slow fir <profesor.fir@gmail.com> - 2017-01-27 07:24 -0800
        Re: Why Python is slow fir <profesor.fir@gmail.com> - 2017-01-27 07:57 -0800
          Re: Why Python is slow fir <profesor.fir@gmail.com> - 2017-01-27 08:46 -0800
        Re: Why Python is slow supercat@casperkitty.com - 2017-01-27 08:06 -0800
          Re: Why Python is slow fir <profesor.fir@gmail.com> - 2017-01-27 08:39 -0800
            Re: Why Python is slow fir <profesor.fir@gmail.com> - 2017-01-27 13:29 -0800
  Re: 3**3**3**3 Noob <root@127.0.0.1> - 2017-01-27 14:33 +0100

csiph-web