How to change the owner of a method in a block?

[Iñaki Baz Castillo]

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[Lex Williams]

one way would be to use instance_eval :

def new(&blk)
instance_eval &blk
end

I meant to write :

def initialize(&blk)
instance_eval &blk
end

too much java can get you high .

 

[Iñaki Baz Castillo]

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[Peña, Botp]

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[Iñaki Baz Castillo]

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[botp]

So using "instance_eval" is ~ 40% slower than running directly the code.

well, we can try again

botp@jedi-hopeful:~$ cat test.rb
require 'benchmark'
n=3D100_000
Benchmark.bmbm do |x|
x.report("normal") { n.times { a=3Dnil;a=3D123; a2=3Da*2; a3=3Da*3 }}
x.report("string") { n.times {instance_eval 'a=3Dnil;a=3D123; a2=3Da*2; a=
3=3Da*3' }}
x.report("block") { n.times {instance_eval {a=3Dnil;a=3D123; a2=3Da*2; a3=
=3Da*3} }}
x.report("block-broken") { n.times {a=3Dnil;instance_eval{a=3D123};
instance_eval{ a2=3Da*2};
instance_eval{a3=3Da*3}
}
}
end




botp@jedi-hopeful:~$ ruby test.rb
Rehearsal ------------------------------------------------
normal 0.140000 0.000000 0.140000 ( 0.247775)
string 2.420000 0.010000 2.430000 ( 3.438391)
block 0.250000 0.000000 0.250000 ( 0.375656)
block-broken 0.470000 0.010000 0.480000 ( 0.698093)
--------------------------------------- total: 3.300000sec

user system total real
normal 0.120000 0.000000 0.120000 ( 0.216789)
string 2.480000 0.020000 2.500000 ( 3.291342)
block 0.300000 0.000000 0.300000 ( 0.423327)
block-broken 0.490000 0.000000 0.490000 ( 0.703046)
botp@jedi-hopeful:~$


slower but not slow (in my own mileage
or optimistically, direct code is faster than a code block

 

[Iñaki Baz Castillo]

El Jueves, 11 de Septiembre de 2008, botp escribi=F3:

e.

well, we can try again

botp@jedi-hopeful:~$ cat test.rb
require 'benchmark'
n=3D100_000
Benchmark.bmbm do |x|
x.report("normal") { n.times { a=3Dnil;a=3D123; a2=3Da*2; a3=3Da*3 }}
x.report("string") { n.times {instance_eval 'a=3Dnil;a=3D123; a2=3Da*2;= a3=3Da*3'
}} x.report("block") { n.times {instance_eval {a=3Dnil;a=3D123; a2=3Da*2;= a3=3Da*3}
}} x.report("block-broken") { n.times {a=3Dnil;instance_eval{a=3D123};
instance_eval{ a2=3Da*2};
instance_eval{a3=3Da*3}
}
}
end




botp@jedi-hopeful:~$ ruby test.rb
Rehearsal ------------------------------------------------
normal 0.140000 0.000000 0.140000 ( 0.247775)
string 2.420000 0.010000 2.430000 ( 3.438391)
block 0.250000 0.000000 0.250000 ( 0.375656)
block-broken 0.470000 0.010000 0.480000 ( 0.698093)
--------------------------------------- total: 3.300000sec

user system total real
normal 0.120000 0.000000 0.120000 ( 0.216789)
string 2.480000 0.020000 2.500000 ( 3.291342)
block 0.300000 0.000000 0.300000 ( 0.423327)
block-broken 0.490000 0.000000 0.490000 ( 0.703046)
botp@jedi-hopeful:~$


slower but not slow (in my own mileage
or optimistically, direct code is faster than a code block

Good comparision, thanks

=2D-=20
I=F1aki Baz Castillo