💤

The progress bar with sane defaults that doesn't slow down your loops. Inspired by tqdm.

[dependencies]
zzz = { version = "0.1" }

Features

• Practical defaults
• Seamless integration with iterators and streams
  • If possible, zzz infers the target size from size_hint()
• Automagically determines and updates a good printing frequency
• Very low overhead: doesn't slow down your loop, pretty much no matter how simple the loop body. On average a ...
  • !Sync progress bar update is 4 instructions (on average, 3 CPU cycles on Skylake)
  • Sync progress bar update is also 4 instructions (on average, 38 CPU cycles on Skylake)

Cargo Features

• streams: Enables support for .progress() on async streams (futures::streams::Stream)

Usage examples

Adding a progress bar to an iterator:

use zzz::ProgressBarIterExt as _;

//                             vvvvvvvv
for _ in (0..1000).into_iter().progress() {
    // ...
}

Manually creating and advancing a progress bar:

use zzz::ProgressBar;

let mut pb = ProgressBar::with_target(1234);
for i in 0..1234 {
    // ...
    pb.add(1);
}