Struct Pressure 

pub struct Pressure { /* private fields */ }

What every function a run allocated cost, in the order they were allocated.

Kept per function rather than as one total, because the number that matters is a hot loop and the way to find one in a file the size of an amalgamation is to sort the rows. The total is there too, since it is what a comparison of two builds is usually about and nobody should have to add up ten thousand lines to get it.

Implementations

impl Pressure

pub fn new() -> Self

Nothing recorded yet.

pub fn record(&mut self, name: &str, cost: Cost)

Writes down what one function cost.

pub fn merge(&mut self, other: &Self)

Takes in everything another one recorded, which is how one file’s answer joins a run’s.

pub fn functions(&self) -> usize

How many functions were allocated.

pub fn total(&self) -> Cost

Every function’s cost added together.

pub fn listing(&self) -> String

What -Zregister-pressure=FILE writes.

A comment holding the totals and then one line per function, each of them the three counts and then the name. The counts come first because they are the fields a reader is sorting on and the name is the one field that could be any length, which is the layout -Zrule-coverage uses for the same reason.

Every function is listed, including the ones that spilled nothing, so that one of these files says how much of the module was measured as well as what the answer was. A build that stopped early and a build that spilled nowhere would otherwise look the same.

Trait Implementations

impl Clone for Pressure

fn clone(&self) -> Pressure

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Pressure

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Pressure

fn default() -> Pressure

Returns the “default value” for a type.

impl Eq for Pressure

impl PartialEq for Pressure

fn eq(&self, other: &Pressure) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Pressure