Influential environment variables and options

DUST_WORKDIR_ROOT: an environment variable which sets the root working directory for compilation of your code. Normally, we use the session-specific directory, which is a good choice. You might want to change this in a few cases:

• You want to generate models from a process and you want these to outlive the lifetime of that process (e.g., for running models on an HPC)
• You want to cache the compilation across sessions

If you set this environment variable, then we’ll create models here, each with a name in the pattern dust_<hash> where <hash> is the hash of the generated code. This means that if your model changes we’ll still recompile it.

DUST_QUIET: an environment variable which controls the default level of verbosity when compiling dust models. Set this to a truthy value (e.g., TRUE) to change the default. This can always be overridden by providing a value for the quiet argument to dust_compile() and dust_package().

DUST_DEBUG: an environment variable which controls how pkgload::compile_dll() compiles the C++ code. Set this to a truthy value (e.g., TRUE) to disable optimisation, which allows faster compilation at the cost of slower runtime. This can be overridden by the debug argument to dust_compile().