[−][src]Struct criterion::Benchmark
Structure representing a benchmark (or group of benchmarks) which takes no parameters.
Methods
impl Benchmark
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pub fn sample_size(self, n: usize) -> Self
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Changes the size of the sample for this benchmark
A bigger sample should yield more accurate results if paired with a sufficiently large measurement time.
Sample size must be at least 2.
Panics
Panics if set to zero or one.
pub fn warm_up_time(self, dur: Duration) -> Self
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pub fn measurement_time(self, dur: Duration) -> Self
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Changes the target measurement time for this benchmark. Criterion will attempt to spent approximately this amount of time measuring the benchmark. With a longer time, the measurement will become more resilient to transitory peak loads caused by external programs.
Panics
Panics if the input duration in zero
pub fn nresamples(self, n: usize) -> Self
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Changes the number of resamples for this benchmark
Number of resamples to use for the bootstrap
A larger number of resamples reduces the random sampling errors, which are inherent to the bootstrap method, but also increases the analysis time.
Panics
Panics if the number of resamples is set to zero
pub fn noise_threshold(self, threshold: f64) -> Self
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Changes the noise threshold for this benchmark
This threshold is used to decide if an increase of X%
in the execution time is considered
significant or should be flagged as noise
Note: A value of 0.02
is equivalent to 2%
Panics
Panics is the threshold is set to a negative value
pub fn confidence_level(self, cl: f64) -> Self
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Changes the confidence level for this benchmark
The confidence level is used to calculate the confidence intervals of the estimated statistics
Panics
Panics if the confidence level is set to a value outside the (0, 1)
range
pub fn significance_level(self, sl: f64) -> Self
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Changes the significance level for this benchmark
The significance level is used for hypothesis testing
Panics
Panics if the significance level is set to a value outside the (0, 1)
range
pub fn plot_config(self, new_config: PlotConfiguration) -> Self
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Changes the plot configuration for this benchmark.
pub fn new<S, F>(id: S, f: F) -> Benchmark where
S: Into<String>,
F: FnMut(&mut Bencher) + 'static,
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S: Into<String>,
F: FnMut(&mut Bencher) + 'static,
Create a new benchmark group and adds the given function to it.
Example
fn bench(c: &mut Criterion) { // One-time setup goes here c.bench( "my_group", Benchmark::new("my_function", |b| b.iter(|| { // Code to benchmark goes here })), ); } criterion_group!(benches, bench); criterion_main!(benches);
pub fn new_external<S>(id: S, program: Command) -> Benchmark where
S: Into<String>,
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S: Into<String>,
External program benchmarks were rarely used and are awkward to maintain, so they are scheduled for deletion in 0.3.0
Create a new benchmark group and add the given program to it.
The external program must:
- Read the number of iterations from stdin
- Execute the routine to benchmark that many times
- Print the elapsed time (in nanoseconds) to stdout
// Example of an external program that implements this protocol fn main() { let stdin = io::stdin(); let ref mut stdin = stdin.lock(); // For each line in stdin for line in stdin.lines() { // Parse line as the number of iterations let iters: u64 = line.unwrap().trim().parse().unwrap(); // Setup // Benchmark let start = Instant::now(); // Execute the routine "iters" times for _ in 0..iters { // Code to benchmark goes here } let elapsed = start.elapsed(); // Teardown // Report elapsed time in nanoseconds to stdout println!("{}", elapsed.to_nanos()); } }
pub fn with_function<S, F>(self, id: S, f: F) -> Benchmark where
S: Into<String>,
F: FnMut(&mut Bencher) + 'static,
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S: Into<String>,
F: FnMut(&mut Bencher) + 'static,
Add a function to the benchmark group.
Example:
Benchmark::new("return 10", |b| b.iter(|| 10)) .with_function("return 20", |b| b.iter(|| 20));
pub fn with_program<S>(self, id: S, program: Command) -> Benchmark where
S: Into<String>,
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S: Into<String>,
External program benchmarks were rarely used and are awkward to maintain, so they are scheduled for deletion in 0.3.0
Add an external program to the benchmark group.
Example:
Benchmark::new("internal", |b| b.iter(|| 10)) .with_program("external", Command::new("my_external_benchmark"));
pub fn throughput(self, throughput: Throughput) -> Benchmark
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Set the input size for this benchmark group. Used for reporting the throughput.
Benchmark::new("strlen", |b| b.iter(|| "foo".len())) .throughput(Throughput::Bytes(3));
Trait Implementations
Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,