benchmarks/strings/array_to_s_vars/array_to_s_man_buf.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # This file is free software, which comes along with NIT.  This software is
   4 # distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   5 # without  even  the implied warranty of  MERCHANTABILITY or  FITNESS FOR A
   6 # PARTICULAR PURPOSE.  You can modify it is you want,  provided this header
   7 # is kept unaltered, and a notification of the changes is added.
   8 # You  are  allowed  to  redistribute it and sell it, alone or is a part of
   9 # another product.
  10
  11 # Implementation of Array::to_s with manual FlatBuffer (precalc its capacity)
  12 #
  13 # To be used as a Mixin at compile-time for benchmarking purposes.
  14 module array_to_s_man_buf
  15
  16 intrude import standard::collection::array
  17 import standard::string
  18
  19 redef class Array[E]
  20         redef fun to_s: String do
  21                 var l = length
  22                 var its = _items
  23                 var na = new NativeArray[String](l)
  24                 var i = 0
  25                 var sl = 0
  26                 while i < l do
  27                         var tmp = its[i].to_s
  28                         sl += tmp.length
  29                         na[i] = tmp
  30                         i += 1
  31                 end
  32                 var ns = new FlatBuffer.with_capacity(sl)
  33                 i = 0
  34                 while i < l do
  35                         ns.append na[i]
  36                         i += 1
  37                 end
  38                 return ns.to_s
  39         end
  40 end