Struct Timer 

pub struct Timer { /* private fields */ }

A struct for timing and logging time durations.

Timer uses a HashMap to store multiple named timers, each associated with a label.

Implementations

impl Timer

pub fn new() -> Self

Creates a new Timer instance.

Returns

Returns a new Timer instance with an empty timer HashMap.

pub fn time(&mut self, label: &str)

Starts a new timer.

Arguments

• label - The label for the timer.

pub fn time_log(&self, label: &str, silent: bool) -> f64

Logs and prints the current time of a timer without stopping it.

Arguments

• label - The label of the timer.
• silent - Whether to suppress printing the message.

Returns

Returns the number of milliseconds the timer has been running, or 0.0 if the timer doesn’t exist.

pub fn time_end(&mut self, label: &str, silent: bool) -> f64

Ends a timer and prints its runtime.

Arguments

• label - The label of the timer.
• silent - Whether to suppress printing the message.

Returns

Returns the number of milliseconds the timer has been running, or 0.0 if the timer doesn’t exist.

pub fn single_instance() -> &'static mut Timer

Returns a global singleton instance of Timer

This method implements the singleton pattern to ensure only one Timer instance exists throughout the program. It’s thread-safe and lazily initialized.

Returns

A static mutable reference to the global Timer instance

Safety

This function uses an unsafe block because it manipulates static mutable variables. However, thread safety is guaranteed by using Once to ensure initialization happens only once.

Trait Implementations

impl Default for Timer

Implements the Default trait for Timer.

fn default() -> Self

Creates a default Timer instance.

Returns

Returns a new Timer instance.