Dear All, I am using the following code to replace certain information in binary mode. 
$s=time();
open(FH, "$ARGV[0]");
open(OUT, ">$ARGV[1]");
binmode FH;
binmode OUT;
$/=undef;
$line=<FH>;
$line=~s!(\d{3}\s(\/[^\n]*? f1)\s*([^\n]+sh\s*)+?\d{3}\s)ns!$1$2!gs wh
+ile($line=~/(\d{3}\s(\/[^\n]*? f1)\s*([^\n]+sh\s*)+?\d{3}\s)ns/gs);
print OUT $line;
$e=time();
$r=$e-$s;
close(FH);
close(OUT);
print "Done...\nRuntime: $r seconds";

[download]

This is code is loading entire file content and doing the replacement. If we read line by line we can avoid the out of memory problem. But my replacement is depending on previous line. The below is the input:

224 /EuclidSymbol f1
(D) -22 673 sh
.....
320 ns
.....
221 ns

The output should be as follows:

224 /EuclidSymbol f1
(D) -22 673 sh
.....
320 /EuclidSymbol f1
.....
221 /EuclidSymbol f1

I tried with Tie::File but is not loading Binary data. Please suggest how can i solve the problem. My file size is around 3GB.

Regards,
Ganesh

In reply to Out of Memory by ngbabu

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