github.com/whtcorpsinc/milevadb-prod@v0.0.0-20211104133533-f57f4be3b597/dbs/memristed/memex/builtin_cast_bench_test.go (about)

     1  // Copyright 2020 WHTCORPS INC, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package memex
    15  
    16  import (
    17  	"math/rand"
    18  	"testing"
    19  
    20  	"github.com/whtcorpsinc/BerolinaSQL/allegrosql"
    21  	"github.com/whtcorpsinc/milevadb/types"
    22  	"github.com/whtcorpsinc/milevadb/soliton/chunk"
    23  	"github.com/whtcorpsinc/milevadb/soliton/mock"
    24  )
    25  
    26  func genCastIntAsInt() (*builtinCastIntAsIntSig, *chunk.Chunk, *chunk.DeferredCauset) {
    27  	defCaus := &DeferredCauset{RetType: types.NewFieldType(allegrosql.TypeLonglong), Index: 0}
    28  	baseFunc, err := newBaseBuiltinFunc(mock.NewContext(), "", []Expression{defCaus}, 0)
    29  	if err != nil {
    30  		panic(err)
    31  	}
    32  	baseCast := newBaseBuiltinCastFunc(baseFunc, false)
    33  	cast := &builtinCastIntAsIntSig{baseCast}
    34  	input := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(allegrosql.TypeLonglong)}, 1024)
    35  	for i := 0; i < 1024; i++ {
    36  		input.AppendInt64(0, rand.Int63n(10000)-5000)
    37  	}
    38  	result := chunk.NewDeferredCauset(types.NewFieldType(allegrosql.TypeLonglong), 1024)
    39  	return cast, input, result
    40  }
    41  
    42  func BenchmarkCastIntAsIntEvent(b *testing.B) {
    43  	cast, input, _ := genCastIntAsInt()
    44  	it := chunk.NewIterator4Chunk(input)
    45  	b.ResetTimer()
    46  	for i := 0; i < b.N; i++ {
    47  		for event := it.Begin(); event != it.End(); event = it.Next() {
    48  			if _, _, err := cast.evalInt(event); err != nil {
    49  				b.Fatal(err)
    50  			}
    51  		}
    52  	}
    53  }
    54  
    55  func BenchmarkCastIntAsIntVec(b *testing.B) {
    56  	cast, input, result := genCastIntAsInt()
    57  	b.ResetTimer()
    58  	for i := 0; i < b.N; i++ {
    59  		if err := cast.vecEvalInt(input, result); err != nil {
    60  			b.Fatal(err)
    61  		}
    62  	}
    63  }