Function elapsed_ms

tests/test_py_lsp_scale.c:11–15

#include <time.h>

static double elapsed_ms(struct timespec t0, struct timespec t1) {
    double s = (double)(t1.tv_sec - t0.tv_sec);
    double ns = (double)(t1.tv_nsec - t0.tv_nsec);
    return s * 1000.0 + ns / 1000000.0;
}

/* Build N synthetic class/call pairs into an arena-backed buffer. */
static char *build_fixture(int n_classes, int *out_len) {