define: DUK_USE_GET_RANDOM_DOUBLE
introduced: 2.0.0
default: false
tags:
  - portability
  - performance
description: >
  Override the default internal random number generator which is used for
  Math.random() and some other internal call sites (currently, for example,
  Array.prototype.sort()).  The default random number generator has a very
  low footprint but is not suitable for serious statistics algorithms or
  cryptography.  Overriding the random number generator may thus be useful
  in some environments.

  The macro gets a heap userdata argument and must provide an IEEE double
  in the range [0,1[.