Created
February 21, 2014 15:14
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Which of these OP trees would you expect to execute more quickly?
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Which of these OP trees would you expect to execute more quickly? | |
(Provided that other than what you see here, they're doing the same thing!) | |
$ perl_a -MO=Concise -e '@x = @x{1, 2};' | |
g <@> leave[1 ref] vKP/REFC ->(end) | |
1 <0> enter ->2 | |
2 <;> nextstate(main 1 -e:1) v:{ ->3 | |
f <2> aassign[t3] vKS/COMMON ->g | |
- <1> ex-list lK ->c | |
3 <0> pushmark s ->4 | |
b <@> hslice lK ->c | |
4 <0> pushmark s ->5 | |
8 <@> list lK ->9 | |
5 <0> pushmark s ->6 | |
6 <$> const(PV "1") s ->7 | |
7 <$> const(PV "2") s ->8 | |
a <1> rv2hv[t2] sKR/1 ->b | |
9 <$> gv(*x) s ->a | |
- <1> ex-list lK ->f | |
c <0> pushmark s ->d | |
e <1> rv2av[t1] lKRM*/1 ->f | |
d <$> gv(*x) s ->e | |
-e syntax OK | |
$ perl_b -MO=Concise -e '@x = @x{1, 2};' | |
e <@> leave[1 ref] vKP/REFC ->(end) | |
1 <0> enter ->2 | |
2 <;> nextstate(main 1 -e:1) v:{ ->3 | |
d <2> aassign[t3] vKS/COMMON ->e | |
- <1> ex-list lK ->a | |
3 <0> pushmark s ->4 | |
9 <@> hslice lK ->a | |
4 <0> pushmark s ->- | |
- <1> ex-list lK ->7 | |
- <0> ex-pushmark s ->5 | |
5 <$> const(IV 1) s ->6 | |
6 <$> const(IV 2) s ->7 | |
8 <1> rv2hv[t2] sKR/1 ->9 | |
7 <$> gv(*x) s ->8 | |
- <1> ex-list lK ->d | |
a <0> pushmark s ->b | |
c <1> rv2av[t1] lKRM*/1 ->d | |
b <$> gv(*x) s ->c | |
-e syntax OK |
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