define: DUK_USE_EXEC_REGCONST_OPTIMIZE
introduced: 2.0.0
default: true
tags:
  - performance
  - execution
description: >
  Use an internal optimization to access registers and constants in the
  bytecode executor.  The optimization avoids unnecessary shifts when computing
  addresses but assumes sizeof(duk_tval) is 8 or 16.  This is almost always the
  case, but when it isn't, disable this option.