github.com/nsqio/nsq@v1.3.0/nsqd/guid_test.go (about)

     1  package nsqd
     2  
     3  import (
     4  	"testing"
     5  	"unsafe"
     6  )
     7  
     8  func BenchmarkGUIDCopy(b *testing.B) {
     9  	source := make([]byte, 16)
    10  	var dest MessageID
    11  	for i := 0; i < b.N; i++ {
    12  		copy(dest[:], source)
    13  	}
    14  }
    15  
    16  func BenchmarkGUIDUnsafe(b *testing.B) {
    17  	source := make([]byte, 16)
    18  	var dest MessageID
    19  	for i := 0; i < b.N; i++ {
    20  		dest = *(*MessageID)(unsafe.Pointer(&source[0]))
    21  	}
    22  	_ = dest
    23  }
    24  
    25  func BenchmarkGUID(b *testing.B) {
    26  	var okays, errors, fails int64
    27  	var previd guid
    28  	factory := &guidFactory{}
    29  	for i := 0; i < b.N; i++ {
    30  		id, err := factory.NewGUID()
    31  		if err != nil {
    32  			errors++
    33  		} else if id == previd {
    34  			fails++
    35  			b.Fail()
    36  		} else {
    37  			okays++
    38  		}
    39  		id.Hex()
    40  	}
    41  	b.Logf("okays=%d errors=%d bads=%d", okays, errors, fails)
    42  }