Crate iter_progress[][src]

Expand description

Wrap an iterator, and get progress data as it’s executed. A more advanced .enumerate()


Call .progress() on any Iterator, and get a new iterator that yields (ProgressRecord, T), where T is the original value. A ProgressRecord has many helpful methods to query the current state of the iterator


use iter_progress::ProgressableIter;
// Create an iterator that goes from 0 to 1,000
let my_iter = 0..1_000;
let mut progressor = my_iter.progress();

// This new iterator returns a struct with the current state, and the inner object returned by
// the iterator
let (state, number) =;
assert_eq!(number, 0);

// We can now use methods on `state` to find out about this object

// If we know the size of the iterator, we can query how far we are through it
// How far through the iterator are we. 0 to 1
assert_eq!(state.fraction(), Some(0.001));

// We are 0.1% the way through
assert_eq!(state.percent(), Some(0.1));

Another usage:

use iter_progress::ProgressableIter;

for (state, val) in my_big_vec.iter().progress() {
    // Every 1 second, execute this function with the the `state`
    state.do_every_n_sec(1., |state| {
       println!("{}% the way though, and doing {} per sec.", state.percent().unwrap(), state.rate());

    // Do something to process `val`

.do_every_n_sec is a “best effort” attempt. It’s single threaded, so will be called if the last time that was called was more than N sec ago. .do_every_n_items is called every N items.



Every step of the underlying iterator, one of these is generated. It contains all the information of how this iterator is progresing. Use the methods to access data on it.


Wraps an iterator and keeps track of state used for ProgressRecord’s



An iterator that records it’s progress as it goes along