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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package testing

import (
	"runtime"
)

// AllocsPerRun returns the average number of allocations during calls to f.
// Although the return value has type float64, it will always be an integral value.
//
// To compute the number of allocations, the function will first be run once as
// a warm-up. The average number of allocations over the specified number of
// runs will then be measured and returned.
//
// AllocsPerRun sets GOMAXPROCS to 1 during its measurement and will restore
// it before returning.
func AllocsPerRun(runs int, f func()) (avg float64) {
	defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(1))

// Warm up the function
	f()

// Measure the starting statistics
	var memstats runtime.MemStats
	runtime.ReadMemStats(&memstats)
	mallocs := 0 - memstats.Mallocs

// Run the function the specified number of times
	for i := 0; i < runs; i++ {
		f()
	}

// Read the final statistics
	runtime.ReadMemStats(&memstats)
	mallocs += memstats.Mallocs

// Average the mallocs over the runs (not counting the warm-up).
	// We are forced to return a float64 because the API is silly, but do
	// the division as integers so we can ask if AllocsPerRun()==1
	// instead of AllocsPerRun()<2.
	return float64(mallocs / uint64(runs))
}

Batal

⬅ src 27 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁fstest	dir	—	2024-02-02 18:09	📂 Buka
📁internal	dir	—	2024-02-02 18:09	📂 Buka
📁iotest	dir	—	2024-02-02 18:09	📂 Buka
📁quick	dir	—	2024-02-02 18:09	📂 Buka
📁slogtest	dir	—	2024-02-02 18:09	📂 Buka
🔵allocs.go	go	1.4 KB	2024-02-02 18:09	✏️ 👁️
🔵allocs_test.go	go	817 B	2024-02-02 18:09	✏️ 👁️
🔵benchmark.go	go	23.8 KB	2024-02-02 18:09	✏️ 👁️
🔵benchmark_test.go	go	5.6 KB	2024-02-02 18:09	✏️ 👁️
🔵cover.go	go	3.4 KB	2024-02-02 18:09	✏️ 👁️
🔵example.go	go	2.8 KB	2024-02-02 18:09	✏️ 👁️
🔵export_test.go	go	207 B	2024-02-02 18:09	✏️ 👁️
🔵flag_test.go	go	2 KB	2024-02-02 18:09	✏️ 👁️
🔵fuzz.go	go	22.8 KB	2024-02-02 18:09	✏️ 👁️
🔵helper_test.go	go	2.6 KB	2024-02-02 18:09	✏️ 👁️
🔵helperfuncs_test.go	go	2.4 KB	2024-02-02 18:09	✏️ 👁️
🔵match.go	go	7.7 KB	2024-02-02 18:09	✏️ 👁️
🔵match_test.go	go	8 KB	2024-02-02 18:09	✏️ 👁️
🔵newcover.go	go	1.7 KB	2024-02-02 18:09	✏️ 👁️
🔵panic_test.go	go	7.4 KB	2024-02-02 18:09	✏️ 👁️
🔵run_example.go	go	1.3 KB	2024-02-02 18:09	✏️ 👁️
🔵run_example_wasm.go	go	1.8 KB	2024-02-02 18:09	✏️ 👁️
🔵sub_test.go	go	23.8 KB	2024-02-02 18:09	✏️ 👁️
🔵testing.go	go	75.6 KB	2024-02-02 18:09	✏️ 👁️
🔵testing_other.go	go	386 B	2024-02-02 18:09	✏️ 👁️
🔵testing_test.go	go	19.2 KB	2024-02-02 18:09	✏️ 👁️
🔵testing_windows.go	go	751 B	2024-02-02 18:09	✏️ 👁️

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