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Re: Exhaustive memory allocation using arrays

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tombert.at wrote:
> And, doubling the memory size by assigning a new value:
> 
> for ($i=0; $i < 1000000; $i++) {
>     $value[$i] = "23.4567890123";
> }
> for ($i=0; $i < 1000000; $i++) {
>     $value[$i] = sprintf("%f", $value[$i]);
> }
> 
> Now php is using ~400 MB

I *assume* that the strings in the first loop do not actually allocate a
struct str for every instance, but instead reference a single statically
allocated instance.  The second loop is probably allocating a new struct
str for every sprintf().

Compare with:

  for ($i=0; $i < 1000000; $i++) {
      $value[$i] = "23.4567890123";
  }
  for ($i=0; $i < 1000000; $i++) {
      $value[$i] = floatval($value[$i]);
  }

-- 
Christoph M. Becker

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Exhaustive memory allocation using arrays tombert.at@gmail.com - 2013-05-28 23:27 -0700
  Re: Exhaustive memory allocation using arrays tombert.at@gmail.com - 2013-05-28 23:42 -0700
  Re: Exhaustive memory allocation using arrays tombert.at@gmail.com - 2013-05-29 00:45 -0700
    Re: Exhaustive memory allocation using arrays Christoph Becker <cmbecker69@gmx.de> - 2013-05-29 13:00 +0200
  Re: Exhaustive memory allocation using arrays Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-29 08:22 +0000
    Re: Exhaustive memory allocation using arrays The Natural Philosopher <tnp@invalid.invalid> - 2013-05-29 09:54 +0100
  Re: Exhaustive memory allocation using arrays Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-29 15:30 +0200

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