use strict; use warnings; use Benchmark qw/cmpthese/; my @translation = qw / Zero One Two Three Four Five Six/; my %trans = (1 => "One", 2 => "Two", 3 => "Three", 4 => "Four", 5 => "Five", 6 => "Six"); my @dispatch = ( sub {return "Zero"}, sub {return "One"}, sub {return "Two"}, sub {return "Three"}, sub {return "Four"}, sub {return "Five"}, sub {return "Six"} ); sub test2 { my \$var2 = shift; return ("One") if (\$var2 == 1 ); return ("Two") if (\$var2 == 2 ); return ("Three") if (\$var2 == 3 ); return ("Four ") if (\$var2 == 4 ); return ("Five") if (\$var2 == 5 ); return undef; } sub test3 { my \$var2 = shift; return \$translation[\$var2]; } sub test4 { my \$var = shift; return \$trans{\$var} ; } sub test5 { my \$var = shift; eval { goto "_\$var" } or return "Other"; _1: return "One" ; _2: return "Two" ; _3: return "Three"; _4: return "Four"; _5: return "Five"; } sub test6 { my \$var = shift; return \$dispatch[(\$var)]->(); } cmpthese( -1, { _linear_2 => q {test2("5")}, _array => q {test3("5")}, _hash => q {test4("5")}, _goto => q {test5("5")}, _dispatch => q {test6("5")}, } ) ##```## \$ perl test_if.pl Rate _goto _linear_2 _dispatch _hash _array _goto 1247485/s -- -17% -26% -50% -52% _linear_2 1509714/s 21% -- -11% -40% -42% _dispatch 1688450/s 35% 12% -- -33% -36% _hash 2513434/s 101% 66% 49% -- -4% _array 2621427/s 110% 74% 55% 4% -- ```