i am trying to process a largish ~50 mb log file ,however with the current code ,its taking way too long

i am basically searching for unique id's in second [] and then looping thru whole file looking for keywords and writing to output file..but its taking hours

my@id;
my $date;
my $id;
my $keyword;
my $mess;
my @uniqueid;
my %seen;

#read the file (PLEASE PROVIDE INPUT FILE PATH)
open(hanr,"d:/Log.txt")or die"error $!\n";
#digesting the lines
@lines = <hanr>;
#iterating through the lines
foreach $line (@lines) {
    $line =~ /\[(.+?)\] .* \[(.+?)\] .* \[[^]]+\] \s+ (.*) /x or next 
+;
    $id = $2;
    push (@id , $id);                #pushing id to array
    }

#for getting unique user id's 
foreach $value (@id) {
    if (! $seen{$value}++ ) {
        push @uniqueid, $value;
        
        }
    }

#OPENING OUTPUT FILE;PROVIDE PATH
open (myfile,">D:\\output\\op.txt") or die("error:cannot create $! \n"
+);

foreach $uniquevalue (@uniqueid) {

    foreach $line (@lines) {
        $line =~ /\[(.+?)\] .* \[(.+?)\] .* \[[^]]+\] \s+ (.*) /x or n
+ext ;
        $date = $1;
        $id = $2;
        $keyword = $3;
        
        
        if($uniquevalue eq $2 && $keyword eq "Orchestration Started"){
        print myfile "$date,$id,$keyword \n";
        next;
        }
        if($uniquevalue eq $2 && $keyword =~/^Input Message/){
        print myfile "$date,$id,"."Input Message to P5 \n";
        next;
        }
        if($uniquevalue eq $2 && $keyword =~ /^TP Service Request/){
        print myfile "$date,$id,"."Service Request \n";
        next;
        }
        if($uniquevalue eq $2 && $keyword =~/^P5 Move request :/ ){
        print myfile "$date,$id,"."Move request \n";
        next;
        }
        if($uniquevalue eq $2 && $keyword =~/^ProcessName:/){
        $mess = substr $keyword , 12;
        print myfile "$date,$id,$mess \n";
        next;
        }
        
        if($uniquevalue eq $2 && $keyword =~/^Process Message :/ ){
        my $mess = substr $keyword , 17;
        print myfile "$date,$id,$mess \n";
        next;
        }
        
        
    }
}
[download]

the search for unique id's is fast enough , but for the second block ,the if loops are searching for keyword for each unique id thru the WHOLE file.its painfully slow,how can i improve speed ??

ps. as requested a sample of log or exact signature

[2014-06-24 15:10:10,936] DEBUG - [27421b9e-fbd3-11e3-943c-ff89c266c130] [PreProcess] Ended successfully.

[2014-06-24 15:10:10,936] DEBUG - [27421b9e-fbd3-11e3-943c-ff89c266c130] [PreProcess] Orchestration Started

[date]text - [uniqueid][sometext]keyword-egProcessName:

also this is some more information , i dont need the id's in order in output file. and for each unique id like 27421b9e-fbd3-11e3-943c-ff89c266c130 i want to log date , id and "keyword" so i will pickup only the second line above

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