If the compile cache is enabled, this contains the directory where the compile cache is stored. Only set if status is module.constants.compileCacheStatus.ENABLED or module.constants.compileCacheStatus.ALREADY_ENABLED.
status
module.constants.compileCacheStatus.ENABLED
module.constants.compileCacheStatus.ALREADY_ENABLED
If Node.js cannot enable the compile cache, this contains the error message. Only set if status is module.constants.compileCacheStatus.FAILED.
module.constants.compileCacheStatus.FAILED
One of the {@link constants.compileCacheStatus}