From looking at the link provided by 1nickt I was able to double the speed for times less than 60 seconds (of which there are many) just by adding this line: 
return sprintf("00:00:%02d", $seconds) if $seconds < 60;

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In reply to Re: Convert time in seconds to hh::mm::ss by bangor
in thread Convert time in seconds to hh::mm::ss by bangor

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