99 lines
2 KiB
Go
99 lines
2 KiB
Go
package mmap
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import (
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"fmt"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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// Constants to control the benchmarking
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const (
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maxAllocs = 16 * 1024
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)
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func TestAllocFree(t *testing.T) {
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const Size = 4096
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b := MustAlloc(Size)
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assert.Equal(t, Size, len(b))
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// check we can write to all the memory
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for i := range b {
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b[i] = byte(i)
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}
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// Now free the memory
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MustFree(b)
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}
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func BenchmarkAllocFree(b *testing.B) {
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for _, dirty := range []bool{false, true} {
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for size := 4096; size <= 32*1024*1024; size *= 2 {
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b.Run(fmt.Sprintf("%dk,dirty=%v", size>>10, dirty), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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mem := MustAlloc(size)
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if dirty {
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mem[0] ^= 0xFF
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}
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MustFree(mem)
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}
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})
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}
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}
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}
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// benchmark the time alloc/free takes with lots of allocations already
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func BenchmarkAllocFreeWithLotsOfAllocations(b *testing.B) {
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const size = 4096
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alloc := func(n int) (allocs [][]byte) {
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for i := 0; i < n; i++ {
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mem := MustAlloc(size)
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mem[0] ^= 0xFF
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allocs = append(allocs, mem)
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}
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return allocs
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}
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free := func(allocs [][]byte) {
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for _, mem := range allocs {
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MustFree(mem)
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}
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}
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for preAllocs := 1; preAllocs <= maxAllocs; preAllocs *= 2 {
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allocs := alloc(preAllocs)
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b.Run(fmt.Sprintf("%d", preAllocs), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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mem := MustAlloc(size)
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mem[0] ^= 0xFF
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MustFree(mem)
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}
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})
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free(allocs)
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}
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}
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// benchmark the time alloc/free takes for lots of allocations
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func BenchmarkAllocFreeForLotsOfAllocations(b *testing.B) {
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const size = 4096
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alloc := func(n int) (allocs [][]byte) {
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for i := 0; i < n; i++ {
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mem := MustAlloc(size)
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mem[0] ^= 0xFF
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allocs = append(allocs, mem)
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}
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return allocs
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}
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free := func(allocs [][]byte) {
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for _, mem := range allocs {
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MustFree(mem)
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}
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}
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for preAllocs := 1; preAllocs <= maxAllocs; preAllocs *= 2 {
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b.Run(fmt.Sprintf("%d", preAllocs), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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allocs := alloc(preAllocs)
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free(allocs)
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}
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})
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}
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}
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