Zero-Cost Abstractions: Memory Profiling in Rust

Examining telemetry overlays and customized jemalloc hooks to diagnose unexpected memory allocation patterns in bare-metal environments. We isolate stack vs. heap allocation boundaries without runtime overhead.

// Hooking runtime stats directly from jemalloc arena
unsafe fn profile_heap_extent() -> Result<ArenaStat, AllocErr> {
    let epoch = jemalloc_ctl::epoch::mib()?;
    epoch.advance()?;
    let allocated = jemalloc_ctl::stats::allocated::mib()?.read()?;
    Ok(ArenaStat { bytes_in_use: allocated })
}

Walking the Isar: What Slow Running Taught Me About Debugging

Clearing working memory during long gravel trail runs along the river. When an architectural dead-end consumes your cache, rhythmic, unhurried motion becomes the most reliable garbage collector.

Isar / 48.135° N

“We rarely run out of CPU power while troubleshooting; we run out of mental paging space.”