You can also use the UsageOnly option in the debugger used via the 'V' command:
[EMAIL PROTECTED]:~ $ perl580 -d -e 0
Loading DB routines from perl5db.pl version 1.19
Editor support available.
Enter h or `h h' for help, or `man perldebug' for more help.
main::(-e:1): 0
DB<1> use warnings
DB<2> o UsageOnly
UsageOnly = '1'
DB<3> V warnings
%Offsets = 1 item (keys: 4; values: 1; total: 5 bytes)
%DeadBits = 2 items (keys: 7; values: 2; total: 9 bytes)
%register:: = 3 items (keys: 19; values: 82; total: 101 bytes)
%Bits = 2 items (keys: 7; values: 2; total: 9 bytes)
String space: 125 bytes in 17 strings.
Grand total = 249 bytes (1 level deep) + overhead.
DB<4>
Richard Foley
---
Ciao - shorter than Aufwiedersehen
>-----Original Message-----
>From: Rob Casey [mailto:[EMAIL PROTECTED]
>Sent: Tuesday, August 12, 2003 1:30 AM
>To: Morbus Iff; [EMAIL PROTECTED]
>Subject: Re: Optimization?
>
>
>G'Day Morbus,
>
>At 05:33 PM 2003-08-11 -0400, Morbus Iff wrote:
>
>>Does debugging include optimization (since, theoretically,
>slow code ==
>>bad code)? I've been meaning for a while to look into speeding up
>>AmphetaDesk, but don't really know what path to take (or
>whether there is
>>more than one).
>
>One minor point which I would make is that not all slow code
>is bad code -
>Some code is slow by design as a result of the work required.
>Then again,
>if we were wanting raw speed, it could be argued that we
>should be working
>in C ... :-)
>
>>I know you can do a bunch of stuff with Dprof (most notably,
>optimizing
>>the first three or so must run routines), but what other optimization
>>tools are available to you? How can I find out what's the biggest
>>structure in memory? How can I find out what variables are
>being stored in
>>memory (perhaps erroneously)? Etc., etc.
>
>The size of structures in memory can be determined using the
>Devel::Size
>module by Dan Sugalski -
>http://search.cpan.org/author/DSUGAL/Devel-Size-0.58/Size.pm.
>
>To determine what variables are defined in memory, your best
>bet is to walk
>the symbol table. with Padwalker -
>http://search.cpan.org/author/ROBIN/PadWalker-0.10/PadWalker.pm.
>Alternatively you can dump the symbol table using Devel::Symdump -
>http://search.cpan.org/author/EVO/Devel-PreProcessor-1999.0220/
lib/Devel/PreProcessor.pm
Regards,
Rob
Rob Casey
Technical Manager
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