Enable or disable reporting of memory allocation in R.
The file to be used for recording the memory
allocations. Set to
logical: should the file be over-written or appended to?
numeric: allocations on R's "large vector" heap larger than this number of bytes will be reported.
Enabling profiling automatically disables any existing profiling to another or the same file.
Profiling writes the call stack to the specified file every time
malloc is called to allocate a large vector object or to
allocate a page of memory for small objects. The size of a page of
memory and the size above which
malloc is used for vectors are
compile-time constants, by default 2000 and 128 bytes respectively.
The profiler tracks allocations, some of which will be to previously used memory and will not increase the total memory use of R.
The memory profiler slows down R even when not in use, and so is a compile-time option. The memory profiler can be used at the same time as other R and C profilers.
The R sampling profiler,
Rprof also collects
tracemem traces duplications of specific objects.
The "Writing R Extensions" manual section on "Tidying and profiling R code"
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