use std::num::NonZeroUsize;
use std::sync::OnceLock;
pub fn get_ideal_morsel_size() -> NonZeroUsize {
return *IDEAL_MORSEL_SIZE.get_or_init(|| {
std::env::var("POLARS_IDEAL_MORSEL_SIZE")
.map(|x| {
x.parse::<NonZeroUsize>()
.unwrap_or_else(|_| panic!("invalid value for POLARS_IDEAL_MORSEL_SIZE: {x}"))
})
.unwrap_or(const { NonZeroUsize::new(100_000).unwrap() })
});
static IDEAL_MORSEL_SIZE: OnceLock<NonZeroUsize> = OnceLock::new();
}