benchable6

query

compare HEAD my $a; (^90 X ^90).map( -> ($x, $y) { $a++ }); say $a; ||| my $a; (^90 X ^90).flat.map(-> $x, $y { $a++ }); say $a;

result

¦HEAD: «Benchmark: 
Timing 10 iterations of 0, 1...
8100
8100
8100
8100
8100
8100
8100
8100
8100
8100
         0: 1.4003 wallclock secs @ 7.1411/s (n=10)
8100
8100
8100
8100
8100
8100
8100
8100
8100
8100
         1: 0.7992 wallclock secs @ 12.5129/s (n=10)
		(warning: too few iterations for a reliable count)
O---O--------O------O-----O
|   | Rate   | 1    | 0   |
O===O========O======O=====O
| 1 | 12.5/s | --   | 75% |
| 0 | 7.14/s | -43% | --  |
---------------------------
»