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#include "simdjson.h"
#include <chrono>
#include <cstring>
#include <iostream>
// Gigabyte: https://en.wikipedia.org/wiki/Gigabyte
simdjson_never_inline
double bench(std::string filename, simdjson::padded_string& p) {
std::chrono::time_point<std::chrono::steady_clock> start_clock =
std::chrono::steady_clock::now();
auto error = simdjson::padded_string::load(filename).get(p);
if(error) {
std::cerr << simdjson::error_message(error) << std::endl;
std::abort();
}
std::chrono::time_point<std::chrono::steady_clock> end_clock =
std::chrono::steady_clock::now();
std::chrono::duration<double> elapsed = end_clock - start_clock;
return (static_cast<double>(p.size()) / (1000000000.)) / elapsed.count();
}
int main(int argc, char *argv[]) {
int optind = 1;
if (optind >= argc) {
std::cerr << "Reads document as far as possible. " << std::endl;
std::cerr << "Usage: " << argv[0] << " <jsonfile>" << std::endl;
exit(1);
}
const char *filename = argv[optind];
if (optind + 1 < argc) {
std::cerr << "warning: ignoring everything after " << argv[optind + 1]
<< std::endl;
}
simdjson::padded_string p;
bench(filename, p);
double meanval = 0;
double maxval = 0;
double minval = 10000;
std::cout << "file size: "<< (static_cast<double>(p.size()) / (1000000000.)) << " GB" <<std::endl;
size_t times = p.size() > 1000000000 ? 5 : 50;
#if __cpp_exceptions
try {
#endif
for(size_t i = 0; i < times; i++) {
double tval = bench(filename, p);
if(maxval < tval) maxval = tval;
if(minval > tval) minval = tval;
meanval += tval;
}
#if __cpp_exceptions
} catch (const std::exception &) { // caught by reference to base
std::cerr << "Could not load the file " << filename << std::endl;
return EXIT_FAILURE;
}
#endif
std::cout << "average speed: " << meanval / static_cast<double>(times) << " GB/s"<< std::endl;
std::cout << "min speed : " << minval << " GB/s" << std::endl;
std::cout << "max speed : " << maxval << " GB/s" << std::endl;
return EXIT_SUCCESS;
}
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