$  perl -MO=Concise -e " @vals = map($_*5, @vals); "   $  perl -MO=Concise -e " @vals = map{$_*5} @vals; "
g  <@> leave[1 ref] vKP/REFC ->(end)                   g  <@> leave[1 ref] vKP/REFC ->(end)
1     <0> enter ->2                                    1     <0> enter ->2
2     <;> nextstate(main 1 -e:1) v:{ ->3               2     <;> nextstate(main 2 -e:1) v:{ ->3
f     <2> aassign[t8] vKS/COMMON ->g                   f     <2> aassign[t9] vKS/COMMON ->g
-        <1> ex-list lK ->c                            -        <1> ex-list lK ->c
3           <0> pushmark s ->4                         3           <0> pushmark s ->4
8           <|> mapwhile(other->9)[t7] lK ->c          8           <|> mapwhile(other->9)[t8] lK ->c
7              <@> mapstart lK ->8                     7              <@> mapstart lK* ->8
4                 <0> pushmark s ->5                   4                 <0> pushmark s ->5
-                 <1> null lK/1 ->5                    -                 <1> null lK/1 ->5
b                    <2> multiply[t4] sK/2 ->8         -                    <1> null lK/1 ->8
-                       <1> ex-rv2sv sK/1 ->a          -                       <@> scope lK ->8
9                          <#> gvsv[*_] s ->a          -                          <0> ex-nextstate v ->9
a                       <$> const[IV 5] s ->b          b                          <2> multiply[t4] sK/2 ->-
6                 <1> rv2av[t6] lKM/1 ->7              -                             <1> ex-rv2sv sK/1 ->a
5                    <#> gv[*vals] s ->6               9                                <#> gvsv[*_] s ->a
-        <1> ex-list lK ->f                            a                             <$> const[IV 5] s ->b
c           <0> pushmark s ->d                         6                 <1> rv2av[t6] lKM/1 ->7
e           <1> rv2av[t2] lKRM*/1 ->f                  5                    <#> gv[*vals] s ->6
d              <#> gv[*vals] s ->e                     -        <1> ex-list lK ->f
-e syntax OK                                           c           <0> pushmark s ->d
                                                       e           <1> rv2av[t2] lKRM*/1 ->f
                                                       d              <#> gv[*vals] s ->e
                                                       -e syntax OK