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diff --git a/src/meter.rs b/src/meter.rs
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-// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-//! Rendering time meter
-//!
-//! Used to track rendering times and provide moving averages.
-//!
-//! # Examples
-//!
-//! ```rust
-//! // create a meter
-//! let mut meter = alacritty::meter::Meter::new();
-//!
-//! // Sample something.
-//! {
-//!     let _sampler = meter.sampler();
-//! }
-//!
-//! // Get the moving average. The meter tracks a fixed number of samples, and
-//! // the average won't mean much until it's filled up at least once.
-//! println!("Average time: {}", meter.average());
-
-use std::time::{Duration, Instant};
-
-const NUM_SAMPLES: usize = 10;
-
-/// The meter
-#[derive(Default)]
-pub struct Meter {
-    /// Track last 60 timestamps
-    times: [f64; NUM_SAMPLES],
-
-    /// Average sample time in microseconds
-    avg: f64,
-
-    /// Index of next time to update.
-    index: usize,
-}
-
-/// Sampler
-///
-/// Samplers record how long they are "alive" for and update the meter on drop.
-pub struct Sampler<'a> {
-    /// Reference to meter that created the sampler
-    meter: &'a mut Meter,
-
-    // When the sampler was created
-    created_at: Instant,
-}
-
-impl<'a> Sampler<'a> {
-    fn new(meter: &'a mut Meter) -> Sampler<'a> {
-        Sampler { meter, created_at: Instant::now() }
-    }
-
-    #[inline]
-    fn alive_duration(&self) -> Duration {
-        self.created_at.elapsed()
-    }
-}
-
-impl<'a> Drop for Sampler<'a> {
-    fn drop(&mut self) {
-        self.meter.add_sample(self.alive_duration());
-    }
-}
-
-impl Meter {
-    /// Create a meter
-    pub fn new() -> Meter {
-        Default::default()
-    }
-
-    /// Get a sampler
-    pub fn sampler(&mut self) -> Sampler<'_> {
-        Sampler::new(self)
-    }
-
-    /// Get the current average sample duration in microseconds
-    pub fn average(&self) -> f64 {
-        self.avg
-    }
-
-    /// Add a sample
-    ///
-    /// Used by Sampler::drop.
-    fn add_sample(&mut self, sample: Duration) {
-        let mut usec = 0f64;
-
-        usec += f64::from(sample.subsec_nanos()) / 1e3;
-        usec += (sample.as_secs() as f64) * 1e6;
-
-        let prev = self.times[self.index];
-        self.times[self.index] = usec;
-        self.avg -= prev / NUM_SAMPLES as f64;
-        self.avg += usec / NUM_SAMPLES as f64;
-        self.index = (self.index + 1) % NUM_SAMPLES;
-    }
-}