github.com/m3db/m3@v1.5.0/src/metrics/carbon/parser_benchmark_test.go (about)

     1  // Copyright (c) 2019 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package carbon
    22  
    23  import (
    24  	"fmt"
    25  	"math"
    26  	"regexp"
    27  	"strconv"
    28  	"strings"
    29  	"testing"
    30  	"time"
    31  )
    32  
    33  var (
    34  	testCarbonLine       = []byte("foo.bar.baz 0 1441317285")
    35  	testCarbonLineSpaces = []byte("foo.bar.baz    0  1441317285")
    36  )
    37  
    38  var (
    39  	// nolint: gosimple
    40  	reCarbon = regexp.MustCompile("(?i)^([^\\s]+)\\s+(-?[0-9\\.]+|\\-?nan)\\s+([0-9]+)\\s*$")
    41  )
    42  
    43  func BenchmarkParse(b *testing.B) {
    44  	for n := 0; n < b.N; n++ {
    45  		Parse(testCarbonLine)
    46  	}
    47  }
    48  
    49  func BenchmarkParseSpaces(b *testing.B) {
    50  	for n := 0; n < b.N; n++ {
    51  		Parse(testCarbonLineSpaces)
    52  	}
    53  }
    54  
    55  func BenchmarkRegex(b *testing.B) {
    56  	for n := 0; n < b.N; n++ {
    57  		regexParse(string(testCarbonLine))
    58  	}
    59  }
    60  
    61  func BenchmarkParseName(b *testing.B) {
    62  	for i := 0; i < b.N; i++ {
    63  		ParseName(testCarbonLine)
    64  	}
    65  }
    66  
    67  func BenchmarkParsePacket(b *testing.B) {
    68  	var test string
    69  	for i := 0; i < 10; i++ {
    70  		test += string(testCarbonLine) + "\n"
    71  	}
    72  	testBytes := []byte(test)
    73  	b.ResetTimer()
    74  	for i := 0; i < b.N; i++ {
    75  		ParsePacket(testBytes)
    76  	}
    77  }
    78  
    79  // regexParse parses a carbon line into the corresponding parts using regex
    80  func regexParse(line string) (name string, timestamp time.Time, value float64, err error) {
    81  	parts := reCarbon.FindStringSubmatch(line)
    82  	if len(parts) == 0 {
    83  		err = errInvalidLine
    84  		return
    85  	}
    86  
    87  	name = parts[1]
    88  	tsInSecs, err := strconv.ParseInt(parts[3], 10, 64)
    89  	if err != nil {
    90  		err = fmt.Errorf("invalid timestamp %s: %v", parts[3], err)
    91  		return
    92  	}
    93  
    94  	timestamp = time.Unix(tsInSecs, 0)
    95  	if strings.ToLower(parts[2]) == "-nan" || strings.ToLower(parts[2]) == "nan" {
    96  		value = math.NaN()
    97  	} else {
    98  		value, err = strconv.ParseFloat(parts[2], 64)
    99  	}
   100  
   101  	return
   102  }