benchable6

query

compare HEAD my $a; (^9 X ^9).map( -> ($x, $y) { $a++ }); say $a; ||| my $a; (^9 X ^9).flat.map(-> $x, $y { $a++ }); say $a;

result

¦HEAD: «Benchmark: 
Timing 10 iterations of 0, 1...
81
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81
         0: 0.0228 wallclock secs @ 439.5027/s (n=10)
		(warning: too few iterations for a reliable count)
81
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         1: 0.0154 wallclock secs @ 649.6239/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 | 650/s | --   | 48% |
| 0 | 440/s | -32% | --  |
--------------------------
»