use strict;
use constant FALSE 	=> 1==0;
use Benchmark qw(:all);

cmpthese(1E7, {
	'return;'		=>	sub { return 		},
	'return FALSE;'	=>	sub { return FALSE 	},
	'return 1==0;'	=>	sub { return 1==0 	},
	'implicit'		=>	sub { 				},
	'implicit FALSE'=>	sub { FALSE 		},
	'implicit 1==0'	=>	sub { 1==0 			},
});

##</code><code>##

                      Rate return FALSE; implicit FALSE return 1==0; implicit return; implicit 1==0
return FALSE;   18281536/s            --           -31%         -54%     -63%    -80%          -92%
implicit FALSE  26666667/s           46%             --         -33%     -46%    -71%          -88%
return 1==0;    40000000/s          119%            50%           --     -19%    -56%          -82%
implicit        49261084/s          169%            85%          23%       --    -46%          -77%
return;         91743119/s          402%           244%         129%      86%      --          -58%
implicit 1==0  217391304/s         1089%           715%         443%     341%    137%            --