Or, to avoid nesting loops, use a range operator: 
while (<DATA>) {
    if (/trigger/ .. /timestamp/) {
        if ( $_ =~ /timestamp/ ) {
            print "Found timestamp\n";
            last;
        }
    }
}

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In reply to Re^2: Exiting a loop trickery by Roy Johnson
in thread Exiting a loop trickery by GaijinPunch

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