attr_test.go

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package slog
     6  
     7  import (
     8  	"internal/asan"
     9  	"internal/testenv"
    10  	"testing"
    11  	"time"
    12  )
    13  
    14  func TestAttrNoAlloc(t *testing.T) {
    15  	if asan.Enabled {
    16  		t.Skip("test allocates with -asan")
    17  	}
    18  	testenv.SkipIfOptimizationOff(t)
    19  	// Assign values just to make sure the compiler doesn't optimize away the statements.
    20  	var (
    21  		i int64
    22  		u uint64
    23  		f float64
    24  		b bool
    25  		s string
    26  		x any
    27  		p = &i
    28  		d time.Duration
    29  	)
    30  	a := int(testing.AllocsPerRun(5, func() {
    31  		i = Int64("key", 1).Value.Int64()
    32  		u = Uint64("key", 1).Value.Uint64()
    33  		f = Float64("key", 1).Value.Float64()
    34  		b = Bool("key", true).Value.Bool()
    35  		s = String("key", "foo").Value.String()
    36  		d = Duration("key", d).Value.Duration()
    37  		x = Any("key", p).Value.Any()
    38  	}))
    39  	if a != 0 {
    40  		t.Errorf("got %d allocs, want zero", a)
    41  	}
    42  	_ = u
    43  	_ = f
    44  	_ = b
    45  	_ = s
    46  	_ = x
    47  }
    48  
    49  func BenchmarkAttrString(b *testing.B) {
    50  	var (
    51  		is string
    52  		u  string
    53  		f  string
    54  		bn string
    55  		s  string
    56  		x  string
    57  		ds string
    58  		p  = &is
    59  		d  time.Duration
    60  	)
    61  	b.ReportAllocs()
    62  	for i := 0; i < b.N; i++ {
    63  		is = Int64("key", 1).String()
    64  		u = Uint64("key", 1).String()
    65  		f = Float64("key", 1).String()
    66  		bn = Bool("key", true).String()
    67  		s = String("key", "foo").String()
    68  		ds = Duration("key", d).String()
    69  		x = Any("key", p).String()
    70  	}
    71  	_ = u
    72  	_ = f
    73  	_ = bn
    74  	_ = s
    75  	_ = x
    76  	_ = ds
    77  	_ = p
    78  }
    79
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