define: DUK_USE_VALSTACK_UNSAFE
introduced: 1.2.0
default: false
tags:
  - performance
  - experimental
description: >
  Don't check allocated value stack size in operations like value stack
  pushes.  Improves performance of API calls but causes unsafe memory
  behavior (e.g. a segfault) when user code pushes beyond "checked" value
  stack size.