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Top Forums UNIX for Advanced & Expert Users Linux: Access time of mapped data Post 302322372 by rusttree on Wednesday 3rd of June 2009 01:53:45 PM
Old 06-03-2009
I just got some advice from a Linux guru. He suggested that all of the variables take milliseconds to access, even the ones in the beginning of the file that appear to take microseconds. The difference is the mapper defaults to loading the first page of data into memory when the mapper is first called. So all those variables at the beginning of the .mat file enjoy being defaulted into memory right off the bat.

Still doesn't explain why the last couple of variables also appear to be defaulted into memory as well... but that could just be a oddity of the mapper.
 

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Bio::Coordinate::Utils(3pm)				User Contributed Perl Documentation			       Bio::Coordinate::Utils(3pm)

NAME
Bio::Coordinate::Utils - Additional methods to create Bio::Coordinate objects SYNOPSIS
use Bio::Coordinate::Utils; # get a Bio::Align::AlignI compliant object, $aln, somehow # it could be a Bio::SimpleAlign $mapper = Bio::Coordinate::Utils->from_align($aln, 1); # Build a set of mappers which will map, for each sequence, # that sequence position in the alignment (exon position to alignment # position) my @mappers = Bio::Coordinate::Utils->from_seq_to_alignmentpos($aln); DESCRIPTION
This class is a holder of methods that work on or create Bio::Coordinate::MapperI- compliant objects. . These methods are not part of the Bio::Coordinate::MapperI interface and should in general not be essential to the primary function of sequence objects. If you are thinking of adding essential functions, it might be better to create your own sequence class. See Bio::PrimarySeqI, Bio::PrimarySeq, and Bio::Seq for more. FEEDBACK
Mailing Lists User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists. Your participation is much appreciated. bioperl-l@bioperl.org - General discussion http://bioperl.org/wiki/Mailing_lists - About the mailing lists Support Please direct usage questions or support issues to the mailing list: bioperl-l@bioperl.org rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible. Reporting Bugs Report bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution. Bug reports can be submitted via the web: https://redmine.open-bio.org/projects/bioperl/ AUTHOR - Heikki Lehvaslaiho Email: heikki-at-bioperl-dot-org Jason Stajich jason at bioperl.org APPENDIX
The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _ from_align Title : from_align Usage : $mapper = Bio::Coordinate::Utils->from_align($aln, 1); Function: Create a mapper out of an alignment. The mapper will return a value only when both ends of the input range find a match. Note: This implementation works only on pairwise alignments and is not yet well tested! Returns : A Bio::Coordinate::MapperI Args : Bio::Align::AlignI object Id for the reference sequence, optional from_seq_to_alignmentpos Title : from_seq_to_alignmentpos Usage : $mapper = Bio::Coordinate::Utils->from_seq_to_alignmentpos($aln, 1); Function: Create a mapper out of an alignment. The mapper will map the position of a sequence into that position in the alignment. Will work on alignments of >= 2 sequences Returns : An array of Bio::Coordinate::MapperI Args : Bio::Align::AlignI object perl v5.14.2 2012-03-02 Bio::Coordinate::Utils(3pm)
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