Hi there,

Thanks for the tips. My data looks something like

>ID

Data (a verrry long string of varying length in a single line)

>ID again

Data again

Indexing might be a good idea. Maybe I could only read the IDs (skipping the next line) and then when accessing just add +1 to the index? I need to extract them twice in a code in different subroutines and each time the subroutine specifies what to do with them. I don't know if it is a good idea to store it all in a hash. I only need to extract a fragment of the data in first read and the whole data entry in the other. I don't have the IDs in advance, the suroutine specifies which one I need and what to do with it. I've tried

$Library_Index{<$Library>} = tell(ARGV), scalar <$Library> until eof();

but it takes very long time to do. I wonder if there is a better way to do it since this would be a bottleneck.

In reply to Re^2: Reading HUGE file multiple times by Anonymous Monk
in thread Reading HUGE file multiple times by Anonymous Monk

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