Criterion

Core benchmarking code.

Documentation

class Benchmarkable a where

A benchmarkable function or action.

Methods

run

Arguments

:: a

The function or action to benchmark.

-> Int

The number of times to run or evaluate it.

-> IO ()

Run a function or action the specified number of times.

Instances

Benchmarkable Pure

Benchmarkable (IO a)

data Benchmark

A benchmark may consist of either a single Benchmarkable item with a name, created with bench, or a (possibly nested) group of Benchmarks, created with bgroup.

Instances

Show Benchmark

data Pure

A container for a pure function to benchmark, and an argument to supply to it each time it is evaluated.

Instances

Benchmarkable Pure

nf :: NFData b => (a -> b) -> a -> Pure

Apply an argument to a function, and evaluate the result to head normal form (NF).

whnf :: (a -> b) -> a -> Pure

Apply an argument to a function, and evaluate the result to weak head normal form (WHNF).

nfIO :: NFData a => IO a -> IO ()

Perform an action, then evaluate its result to head normal form. This is particularly useful for forcing a lazy IO action to be completely performed.

whnfIO :: NFData a => IO a -> IO ()

Perform an action, then evaluate its result to weak head normal form (WHNF). This is useful for forcing an IO action whose result is an expression to be evaluated down to a more useful value.

bench

Arguments

:: Benchmarkable b

=> String

A name to identify the benchmark.

-> b

-> Benchmark

Create a single benchmark.

bgroup

Arguments

:: String

A name to identify the group of benchmarks.

-> [Benchmark]

Benchmarks to group under this name.

-> Benchmark

Group several benchmarks together under a common name.

runBenchmark :: Benchmarkable b => Environment -> b -> Criterion Sample

Run a single benchmark, and return timings measured when executing it.

runAndAnalyse

Arguments

:: (String -> Bool)

A predicate that chooses whether to run a benchmark by its name.

-> Environment

-> Benchmark

-> Criterion ()

Run, and analyse, one or more benchmarks.