He added 

<#> gv[*b] s                      # my $b = $b[$i];
<1> rv2av sKR/1
<0> padsv[$i:2,4] s
<2> aelem sK/2
<0> padsv[$b:3,4] sRM*/LVINTRO
<2> sassign vKS/2

[download]

in order to replace a large number of 

<#> gv[*b] s                      # $b[$i]
<1> rv2av sKR/1
<0> padsv[$i:2,3] s
<2> aelem sK/2

[download]

with 

<0> padsv[$b:3,4] s               # $b

[download]

Assuming each of these ops take roughly the same amount of time to execute, this adds up. Basically, 

my $b = $b[$i]; ... $b ... $b ... $b    # 6 + 1*3 = 9 ops

[download]

is faster than 

$b[$i] ...  $b[$i]  ... $b[$i];         # 0 + 4*3 = 12 ops

[download]

Since his code looks up $b[i] 4 to 8 times (depending on the value of $b[$i]), this saves 6 to 18 ops. Per loop pass!

In reply to Re^14: Parallel::ForkManager is time consuming...takes too long by ikegami
in thread Parallel::ForkManager is time consuming...takes too long by esolkc

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