github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/performance/serverbench/diff_bench_test.go (about)

     1  // Copyright 2022 Dolthub, 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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package serverbench
    16  
    17  import (
    18  	"fmt"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/require"
    22  
    23  	_ "github.com/go-sql-driver/mysql"
    24  	"github.com/gocraft/dbr/v2"
    25  )
    26  
    27  func init() {
    28  	connStr := fmt.Sprintf("%v:%v@tcp(%v:%v)/%s",
    29  		"root", "", "127.0.0.1", 3306, "diffbench")
    30  
    31  	conn, err := dbr.Open("mysql", connStr, nil)
    32  	if err != nil {
    33  		panic(err)
    34  	}
    35  	sess = conn.NewSession(&dbr.NullEventReceiver{})
    36  }
    37  
    38  var sess *dbr.Session
    39  
    40  func BenchmarkServerDiff(b *testing.B) {
    41  	b.Run("point diff", func(b *testing.B) {
    42  		benchmarkQuery(b, "SELECT count(*) "+
    43  			"FROM dolt_commit_diff_difftbl "+
    44  			"WHERE to_commit=HASHOF('HEAD') "+
    45  			"AND from_commit=HASHOF('HEAD^')")
    46  	})
    47  	b.Run("point lookup", func(b *testing.B) {
    48  		benchmarkQuery(b, "SELECT * FROM difftbl WHERE pk = 12345")
    49  	})
    50  }
    51  
    52  func benchmarkQuery(b *testing.B, query string) {
    53  	for i := 0; i < b.N; i++ {
    54  		r, err := sess.Query(query)
    55  		require.NoError(b, err)
    56  		require.NoError(b, r.Close())
    57  	}
    58  }