go.mway.dev/chrono@v0.6.1-0.20240126030049-189c5aef20d2/clock/throttled_clock_benchmark_test.go (about)

     1  // Copyright (c) 2023 Matt Way
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to
     5  // deal in the Software without restriction, including without limitation the
     6  // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
     7  // sell copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    18  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
    19  // IN THE THE SOFTWARE.
    20  
    21  package clock_test
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"go.mway.dev/chrono/clock"
    28  )
    29  
    30  func BenchmarkThrottledClock(b *testing.B) {
    31  	var (
    32  		cases = []struct {
    33  			name  string
    34  			nowfn clock.NanotimeFunc
    35  		}{
    36  			{
    37  				name:  "mono",
    38  				nowfn: clock.DefaultNanotimeFunc(),
    39  			},
    40  			{
    41  				name:  "wall",
    42  				nowfn: clock.DefaultWallNanotimeFunc(),
    43  			},
    44  		}
    45  		intervals = []time.Duration{
    46  			time.Second,
    47  			100 * time.Millisecond,
    48  			10 * time.Millisecond,
    49  			time.Millisecond,
    50  			100 * time.Microsecond,
    51  			10 * time.Microsecond,
    52  			time.Microsecond,
    53  		}
    54  		nanos int64
    55  	)
    56  
    57  	for _, tt := range cases {
    58  		b.Run(tt.name, func(b *testing.B) {
    59  			for _, dur := range intervals {
    60  				b.Run(dur.String(), func(b *testing.B) {
    61  					clk := clock.NewThrottledClock(tt.nowfn, dur)
    62  					defer clk.Stop()
    63  
    64  					b.ReportAllocs()
    65  					b.ResetTimer()
    66  
    67  					for i := 0; i < b.N; i++ {
    68  						nanos = clk.Nanotime()
    69  					}
    70  				})
    71  			}
    72  		})
    73  	}
    74  
    75  	_ = nanos
    76  }
    77  
    78  func BenchmarkThrottledClockSources(b *testing.B) {
    79  	var (
    80  		nanos int64
    81  		now   time.Time
    82  	)
    83  
    84  	b.Run("nanos", func(b *testing.B) {
    85  		clk := clock.NewThrottledMonotonicClock(time.Microsecond)
    86  		defer clk.Stop()
    87  
    88  		b.ReportAllocs()
    89  		b.ResetTimer()
    90  
    91  		for i := 0; i < b.N; i++ {
    92  			nanos = clk.Nanotime()
    93  		}
    94  	})
    95  
    96  	b.Run("now", func(b *testing.B) {
    97  		clk := clock.NewThrottledMonotonicClock(time.Microsecond)
    98  		defer clk.Stop()
    99  
   100  		b.ReportAllocs()
   101  		b.ResetTimer()
   102  
   103  		for i := 0; i < b.N; i++ {
   104  			now = clk.Now()
   105  		}
   106  	})
   107  
   108  	_ = nanos
   109  	_ = now
   110  }