moveload_test.go

     1  // Copyright 2026 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 test
     6  
     7  import "testing"
     8  
     9  // From issue #77720.
    10  type moveLoadBenchHandle[T any] struct {
    11  	value *T
    12  }
    13  
    14  func (h moveLoadBenchHandle[T]) Value() T {
    15  	return *h.value
    16  }
    17  
    18  type moveLoadBenchBig struct {
    19  	typ        int8
    20  	index      int64
    21  	str        string
    22  	pkgID      string
    23  	dummyField [1024]byte
    24  }
    25  
    26  type moveLoadBenchS struct {
    27  	h moveLoadBenchHandle[moveLoadBenchBig]
    28  }
    29  
    30  var moveLoadBenchSink int8
    31  
    32  func moveLoadBenchTypViaValue(s moveLoadBenchS) int8 {
    33  	return s.h.Value().typ
    34  }
    35  
    36  func moveLoadBenchTypViaPtr(s moveLoadBenchS) int8 {
    37  	return (*s.h.value).typ
    38  }
    39  
    40  func benchmarkMoveLoad(b *testing.B, f func(moveLoadBenchS) int8) {
    41  	backing := make([]moveLoadBenchBig, 1<<10)
    42  	ss := make([]moveLoadBenchS, len(backing))
    43  	for i := range backing {
    44  		backing[i].typ = int8(i)
    45  		ss[i] = moveLoadBenchS{h: moveLoadBenchHandle[moveLoadBenchBig]{&backing[i]}}
    46  	}
    47  
    48  	b.ResetTimer()
    49  	var x int8
    50  	for i := 0; i < b.N; i++ {
    51  		x += f(ss[i&(len(ss)-1)])
    52  	}
    53  	moveLoadBenchSink = x
    54  }
    55  
    56  func BenchmarkMoveLoadTypViaValue(b *testing.B) {
    57  	benchmarkMoveLoad(b, moveLoadBenchTypViaValue)
    58  }
    59  
    60  func BenchmarkMoveLoadTypViaPtr(b *testing.B) {
    61  	benchmarkMoveLoad(b, moveLoadBenchTypViaPtr)
    62  }
    63
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