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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <sys/stat.h>
#include <csv_parser.h>
int noop_field_cb(csv_parser_t *parser, const char *data, size_t length, int row, int col)
{
return 0; // Do nothing, we only want to benchmark the parser, not allocation overhead
}
int main(int argc, const char *argv[])
{
if (argc < 2) {
fprintf(stderr, "Usage: %s <csv_file> [iterations]\n", argv[0]);
return 1;
}
const char *filename = argv[1];
int iterations = 1000;
if (argc >= 3) {
iterations = atoi(argv[2]);
}
int fd = open(filename, O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
struct stat st;
if (fstat(fd, &st) == -1) {
perror("fstat");
close(fd);
return 1;
}
size_t file_size = st.st_size;
char *buffer = malloc(file_size + 1);
if (!buffer) {
perror("malloc");
close(fd);
return 1;
}
ssize_t nread = read(fd, buffer, file_size);
if (nread != file_size) {
perror("read");
free(buffer);
close(fd);
return 1;
}
close(fd);
csv_parser_t parser;
csv_parser_settings_t settings;
settings.delimiter = ',';
settings.field_cb = noop_field_cb;
printf("Benchmarking %s (%.2f MB) for %d iterations...\n", filename, (double)file_size / (1024 * 1024), iterations);
struct timespec start, end;
clock_gettime(CLOCK_MONOTONIC, &start);
for (int i = 0; i < iterations; i++) {
csv_parser_init(&parser);
csv_parser_execute(&parser, &settings, buffer, file_size);
csv_parser_finish(&parser, &settings);
}
clock_gettime(CLOCK_MONOTONIC, &end);
free(buffer);
double elapsed = (end.tv_sec - start.tv_sec) + (end.tv_nsec - start.tv_nsec) / 1e9;
double total_bytes = (double)file_size * iterations;
double mb_per_sec = (total_bytes / (1024 * 1024)) / elapsed;
printf("Time elapsed: %.3f seconds\n", elapsed);
printf("Throughput: %.2f MB/s\n", mb_per_sec);
return 0;
}
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