For perl5.10
perl -Mre=debug -e "qr/a .{1,10} \ /x;qr/a .{1,10} [ ]/x;"
gives
Compiling REx "a .{1,10} \ "
Final program:
1: EXACT <a> (3)
3: CURLY {1,10} (6)
5: REG_ANY (0)
6: EXACT < > (8)
8: END (0)
anchored "a" at 0 floating " " at 2..11 (checking floating) minlen 3
Compiling REx "a .{1,10} [ ]"
Final program:
1: EXACT <a> (3)
3: CURLY {1,10} (6)
5: REG_ANY (0)
6: EXACT < > (8)
8: END (0)
So the two compile to the identical program under 5.10. And indeed, when I take out class_nodot, I get:
Rate literal class
literal 531978/s -- -1%
class 539600/s 1% --
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