Struct CacheBuster 

pub struct CacheBuster { /* private fields */ }

Cache-busting buffer — sized to evict L1+L2 on Apple Silicon (M-series: 192 KB L1d / core, 16 MB L2 shared per cluster). Borrowed from MAX’s internal_utils/_cache_busting.mojo (#19).

Allocate once, then call .thrash() between bench iterations to flush whatever the previous iteration left in cache. Without this, “cache-cold” timings actually measure cache-warm performance and over-report by 2-5×.

Implementations

impl CacheBuster

pub fn new() -> CacheBuster

Allocate a buster sized to evict the targeted cache. Defaults to 32 MB — twice the M-series L2 — which guarantees full L2 eviction. Pass a custom size for finer control (e.g. 256 KB to evict only L1).

pub fn with_bytes(bytes: usize) -> CacheBuster

pub fn thrash(&mut self)

Walk the buffer once, touching every cache line. After this returns, the previous workload’s data is evicted.

Trait Implementations

impl Default for CacheBuster

fn default() -> CacheBuster

Returns the “default value” for a type.