Re: Strings and numbers: losing memory and mind.


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Re: Strings and numbers: losing memory and mind.

by oha (Friar)

on Sep 28, 2007 at 13:48 UTC ( #641530=note: print w/replies, xml )

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in reply to Strings and numbers: losing memory and mind.

you have 1 million of undef before reading, and 1 million of string after reading.

those strings have an average of 150-200 bytes each, so they are alot bigger then undef

Oha

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Re^2: Strings and numbers: losing memory and mind.
by kyle (Abbot) on Sep 28, 2007 at 15:18 UTC

What you write is mostly true but not very relevant.

First, a correction: I originally wound up with 50 million strings averaging about 2.57 characters each (note that I split each line as it's read).

The fact that I'm replacing lots of undef with lots of strings isn't the problem. I observed that process, and when it was done, I had a certain amount of memory used. The problem is that memory usage continued to grow as I operated on (but did not add to) the arrays I'd created.

The problem is caused by the fact that Perl is converting all those strings to numbers for me on the fly. My solution was to force them to be numbers in the first place (instead of strings). Now, when I operate on the set, it stays the same size.

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