github.com/SkycoinProject/gomobile@v0.0.0-20190312151609-d3739f865fa6/bind/testdata/benchmark/benchmark.go (about)

     1  // Copyright 2016 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 benchmark contains benchmarking bound functions for internal use.
     6  package benchmark
     7  
     8  import (
     9  	"log"
    10  	"time"
    11  )
    12  
    13  type Benchmarks interface {
    14  	// It seems to be much faster to call a native function from Java
    15  	// when there is already a native call earlier in the stack.
    16  
    17  	// Run runs a named benchmark from a different thread, with
    18  	// no native call prior in the stack.
    19  	Run(name string, n int)
    20  	// RunDirect runs a named benchmark directly, with the native
    21  	// context from the call itself.
    22  	RunDirect(name string, n int)
    23  
    24  	// Callbacks for Go benchmarks
    25  	NewI() I
    26  	Noargs()
    27  	Onearg(_ int)
    28  	Oneret() int
    29  	Ref(_ I)
    30  	Manyargs(_, _, _, _, _, _, _, _, _, _ int)
    31  	String(_ string)
    32  	StringRetShort() string
    33  	StringRetLong() string
    34  	Slice(_ []byte)
    35  }
    36  
    37  type (
    38  	I interface {
    39  		F()
    40  	}
    41  
    42  	AnI struct {
    43  	}
    44  )
    45  
    46  func (_ *AnI) F() {
    47  }
    48  
    49  func NewI() I {
    50  	return new(AnI)
    51  }
    52  
    53  func runBenchmark(name string, f func(n int)) {
    54  	// Run once for warmup
    55  	f(1)
    56  	n := 1000
    57  	var dt time.Duration
    58  	minDuration := 1 * time.Second
    59  	for dt < minDuration {
    60  		n *= 2
    61  		t0 := time.Now()
    62  		f(n)
    63  		dt = time.Since(t0)
    64  	}
    65  	log.Printf("Benchmark%s	%d	%d ns/op\n", name, n, dt.Nanoseconds()/int64(n))
    66  }
    67  
    68  func runGoBenchmark(name string, f func()) {
    69  	runBenchmark("Go"+name, func(n int) {
    70  		for i := 0; i < n; i++ {
    71  			f()
    72  		}
    73  	})
    74  	runBenchmark("Go"+name+"Direct", func(n int) {
    75  		done := make(chan struct{})
    76  		go func() {
    77  			for i := 0; i < n; i++ {
    78  				f()
    79  			}
    80  			close(done)
    81  		}()
    82  		<-done
    83  	})
    84  }
    85  
    86  func RunBenchmarks(b Benchmarks) {
    87  	names := []string{
    88  		"Empty",
    89  		"Noargs",
    90  		"Onearg",
    91  		"Oneret",
    92  		"Manyargs",
    93  		"Refforeign",
    94  		"Refgo",
    95  		"StringShort",
    96  		"StringLong",
    97  		"StringShortUnicode",
    98  		"StringLongUnicode",
    99  		"StringRetShort",
   100  		"StringRetLong",
   101  		"SliceShort",
   102  		"SliceLong",
   103  	}
   104  	for _, name := range names {
   105  		runBenchmark("Foreign"+name, func(n int) {
   106  			b.Run(name, n)
   107  		})
   108  		runBenchmark("Foreign"+name+"Direct", func(n int) {
   109  			b.RunDirect(name, n)
   110  		})
   111  	}
   112  	runGoBenchmark("Empty", func() {})
   113  	runGoBenchmark("Noarg", func() { b.Noargs() })
   114  	runGoBenchmark("Onearg", func() { b.Onearg(0) })
   115  	runGoBenchmark("Oneret", func() { b.Oneret() })
   116  	foreignRef := b.NewI()
   117  	runGoBenchmark("Refforeign", func() { b.Ref(foreignRef) })
   118  	goRef := NewI()
   119  	runGoBenchmark("Refgo", func() { b.Ref(goRef) })
   120  	runGoBenchmark("Manyargs", func() { b.Manyargs(0, 0, 0, 0, 0, 0, 0, 0, 0, 0) })
   121  	runGoBenchmark("StringShort", func() { b.String(ShortString) })
   122  	runGoBenchmark("StringLong", func() { b.String(LongString) })
   123  	runGoBenchmark("StringShortUnicode", func() { b.String(ShortStringUnicode) })
   124  	runGoBenchmark("StringLongUnicode", func() { b.String(LongStringUnicode) })
   125  	runGoBenchmark("StringRetShort", func() { b.StringRetShort() })
   126  	runGoBenchmark("StringRetLong", func() { b.StringRetLong() })
   127  	runGoBenchmark("SliceShort", func() { b.Slice(ShortSlice) })
   128  	runGoBenchmark("SliceLong", func() { b.Slice(LongSlice) })
   129  }
   130  
   131  func Noargs() {
   132  }
   133  
   134  func Onearg(_ int) {
   135  }
   136  
   137  func Manyargs(_, _, _, _, _, _, _, _, _, _ int) {
   138  }
   139  
   140  func Oneret() int {
   141  	return 0
   142  }
   143  
   144  func String(_ string) {
   145  }
   146  
   147  func StringRetShort() string {
   148  	return ShortString
   149  }
   150  
   151  func StringRetLong() string {
   152  	return LongString
   153  }
   154  
   155  func Slice(_ []byte) {
   156  }
   157  
   158  func Ref(_ I) {
   159  }
   160  
   161  var (
   162  	ShortSlice = make([]byte, 10)
   163  	LongSlice  = make([]byte, 100000)
   164  )
   165  
   166  const (
   167  	ShortString        = "Hello, World!"
   168  	LongString         = "Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!"
   169  	ShortStringUnicode = "Hello, 世界!"
   170  	LongStringUnicode  = "Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!"
   171  )