Using map is a lot of overhead for just assigning to a hash.
use Benchmark;
timethese(1000, {
'map1' => sub {
my %str = map {($_,1)} (0..1024);
},
'arry' => sub {
my %str = ();
@str{0..1024} = (1)x1025;
}
});
Benchmark: timing 1000 iterations of arry, map1...
arry: 1 wallclock secs ( 1.36 usr + 0.00 sys = 1.36 CPU) @ 73
+5.29/s (n=1000)
map1: 3 wallclock secs ( 3.11 usr + 0.00 sys = 3.11 CPU) @ 32
+1.54/s (n=1000)
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