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#[cfg(feature = "cache-efficiency-debug")]
mod impl_ {
/// A helper to collect useful information about cache efficiency.
pub struct Debug {
owner: String,
hits: usize,
puts: usize,
misses: usize,
}
impl Debug {
/// Create a new instance
#[inline]
pub fn new(owner: impl Into<String>) -> Self {
Debug {
owner: owner.into(),
hits: 0,
puts: 0,
misses: 0,
}
}
/// Count cache insertions
#[inline]
pub fn put(&mut self) {
self.puts += 1;
}
/// Count hits
#[inline]
pub fn hit(&mut self) {
self.hits += 1;
}
/// Count misses
#[inline]
pub fn miss(&mut self) {
self.misses += 1;
}
}
impl Drop for Debug {
fn drop(&mut self) {
let hits = self.hits;
let misses = self.misses;
let ratio = hits as f32 / misses as f32;
eprintln!(
"{}[{:0x}]: {} / {} (hits/misses) = {:.02}%, puts = {}",
self.owner,
self as *const _ as usize,
hits,
misses,
ratio * 100.0,
self.puts
);
}
}
}
#[cfg(not(feature = "cache-efficiency-debug"))]
mod impl_ {
/// The disabled, zero size do-nothing equivalent
pub struct Debug;
impl Debug {
/// Create a new instance
#[inline]
pub fn new(_owner: impl Into<String>) -> Self {
Debug
}
/// noop
pub fn put(&mut self) {}
/// noop
pub fn hit(&mut self) {}
/// noop
pub fn miss(&mut self) {}
}
}
pub use impl_::Debug;
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