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Re: one-liner hogs

by Trinary (Pilgrim)
on Feb 01, 2001 at 03:37 UTC ( #55600=note: print w/replies, xml ) Need Help??


in reply to one-liner hogs

Very basic one:
perl -e 'while (++$i) { $foo[$i] = $i; }'
That'll chew memory like mad, and soon bomb out. CPU usage minimal.

of course, you can make it use CPU...

perl -e 'fork; fork; while (++$i) { $c .= crypt($i,$i); $c = substr($c +,4,128); }
Ctrl-C kills all children, no root required! Load should fly up to around 4, give it a minute or two. To add mem usage, change the substr length.

Fun request!

Trinary

Replies are listed 'Best First'.
Re: Re: one-liner hogs
by premchai21 (Curate) on Feb 28, 2001 at 06:36 UTC
    My humble contribution: while (++$i) { $foo{$i}=[ @foo ]; $foo[$i]=[ %foo, $i ]; } bounces back and forth making new arrays of ever-increasing size. Allocated about 350MB in about 30 secs. Uses a lot of processor, though.

    Agreed. Quite fun deliberately pessimizing code.

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[Corion]: ... values to be used. For example, I think for headers, one would want to have various kinds of Content-Encoding headers, but for the get_parameters one would have various kinds of Bobby Tables
[choroba]: What about [metadoc:// Algorithm::Loops]?
[Corion]: choroba: Yeah, but handing off the request to Dancer,Plack, Mojolicious,LWP is easy once I have the data filled into some structure ;))
[choroba]: Algorithm::Loops
[Corion]: choroba: I'm using that to generate the permutations, but I don't know how the user can pass the intended values to my function in a sane way
[Corion]: I have a prototype that permutes the get_parameters, but the values used for the get parameters should be different from the values used for the headers and potentially for parts of the URL
[Corion]: But yes, in general, my approach will be "split the URL into another set of parameters, generate an array of allowed values for each parameter and then NestedLoops() over the set"
[choroba]: hmm... so you need something like bag from Test::Deep, but not for checking, but for generation
[Corion]: This has the dual use of easily requesting sequential URLs and also being suitable for testing
[Corion]: For testing, I want to skip all tests with the same value(s) once one test fails to cut down on the number of failing tests

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