Description Usage Arguments Examples
fast convert integer vector to character vector
1 2 3 |
x |
td::vector<int> |
bufferSize |
int if any input strings are longer than this number (default 16) there will be memory errors. No checks done for speed. |
1 2 3 4 5 6 7 8 9 10 11 12 13 | ## Not run:
pts <- randomPatients(1e7)
# conclusion: buffer size matters little (so default to be more generous), and Rcpp version fastest.
microbenchmark::microbenchmark(fastIntToStringStd(pts$visitId, buffer = 8),
fastIntToStringStd(pts$visitId, buffer = 16),
fastIntToStringStd(pts$visitId, buffer = 64),
fastIntToStringRcpp(pts$visitId, buffer = 8),
fastIntToStringRcpp(pts$visitId, buffer = 16),
fastIntToStringRcpp(pts$visitId, buffer = 64),
as.character(pts$visitId),
asCharacterNoWarn(pts$visitId), times = 5)
## End(Not run)
|
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