hi monks, i am searching for a keyword in big file (536 mb). What i want as a result of this search is not only the keyword, but five words before and after the occurence of the keyword. What i do now is to input each line of the file into a string and split the string into individual words. Then i match the query word to each of these words from the file. Since they are in an array i extract five words before and after the keyword from the array and join them to make the result string . This approach works fine when i run this on a small file . But for size of file i am working with , this approach becomes very slow. I run this as a part of cgi script , so i get timeouts when the query word is actually towards the middle of file or much deeper. Can anybody tell me a better way to do it , or correct my approach , given the size of this file. I have not included the result string formation here.here is the code i use 
an array @morgr is created here and shuffled to look for the word in r
+andom lines of the file

open (MORG, "< /home/sid/kwicionary/$filename") or die "Can't open $fi
+lename for reading: $!";
$path = "/home/sid/kwicionary/";
$indexname = "$path$filename.index";

sysopen(MIDX,$indexname, O_CREAT|O_RDONLY) or die "Can't open $indexna
+me for read/write:$!";
build_index(*MORG, *MIDX) if -z $indexname;

MORG:foreach (@morgr){
$line_number = $_;
$line = line_with_index(*MORG,*MIDX,$line_number);

if ($key =~ /\*/){
               $key = substr($key,0,(length($key) -1));
                @word = split(' ',$line);
                foreach (@word){
                if ($_ =~ /$key/){
                push (@morg_results , $_);
                                        }
                }
        }

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In reply to searching for a keyword with context window by fadingjava

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