The fact that you're slurping 'stranger.xap' into memory isn't helping your memory consumption.

It may be much more efficient (from a memory standpoint) to extract the values that you need from 'temp.txt' and then scan 'stranger.xap' by lines or paragraphs (faq) to find matches.

Hanlon's Razor - "Never attribute to malice that which can be adequately explained by stupidity"

In reply to Re: RegEx on 4MB file consumes of 2GB of ram before windows shuts it down. by Art_XIV
in thread RegEx on 4MB file consumes of 2GB of ram before windows shuts it down (Memory Leak in 5.8.2) by Ardemus

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