std::string_view(reinterpret_cast<const char*>(&(json[0])), std::size(json)) VS std::string(std::cbegin(json), std::cend(json))

safety-bench.R

scales::number_bytes(file.size(yuge_json_file))
##> [1] "890 MiB"

# parser.parse(
#     std::string_view(reinterpret_cast<const char*>(&(json[0])), std::size(json))
# );
js_path <- yuge_json_file
raw_js <- readr::read_file_raw(js_path)
compressed_path <- "~/yuge.json.gz"
writeBin(memCompress(rawToChar(raw_js)), compressed_path)
microbenchmark::microbenchmark(
    fparse(raw_js),
    fload(compressed_path),
    check = "identical",
    times = 3
)
##> Unit: seconds
##>                    expr      min       lq     mean   median       uq      max neval
##>          fparse(raw_js) 4.342298 4.549565 5.525309 4.756832 6.116815 7.476798     3
##>  fload(compressed_path) 7.513787 8.121258 8.342995 8.728730 8.757599 8.786468     3


# parser.parse(std::string(std::cbegin(json), std::cend(json)));
js_path <- yuge_json_file
raw_js <- readr::read_file_raw(js_path)
compressed_path <- "~/yuge.json.gz"
microbenchmark::microbenchmark(
    fparse(raw_js),
    fload(compressed_path),
    check = "identical",
    times = 3
)
##> Unit: seconds
##>                    expr      min       lq     mean   median       uq      max neval
##>          fparse(raw_js) 4.699747 5.143523 5.464226 5.587299 5.846466 6.105634     3
##>  fload(compressed_path) 7.864278 7.987190 8.446771 8.110101 8.738018 9.365935     3