This function uses the utils package to compute the total
amount of memory used by objects in an environment.
Usage
env_size(env)
Value
The size in bytes, as a numeric value (scalar).
Arguments
env
The environment whose size is to be computed.
Details
The names are wrapped in backticks. Otherwise, non-syntactic
names will cause problems. This function is used within
render_one as part of the runtime stats assessment.