/usr/share/gocode/src/github.com/dlclark/regexp2/regexp_performance_test.go is in golang-github-dlclark-regexp2-dev 1.1.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 | package regexp2
import (
"strings"
"testing"
)
func BenchmarkLiteral(b *testing.B) {
x := strings.Repeat("x", 50) + "y"
b.StopTimer()
re := MustCompile("y", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkNotLiteral(b *testing.B) {
x := strings.Repeat("x", 50) + "y"
b.StopTimer()
re := MustCompile(".y", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkMatchClass(b *testing.B) {
b.StopTimer()
x := strings.Repeat("xxxx", 20) + "w"
re := MustCompile("[abcdw]", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkMatchClass_InRange(b *testing.B) {
b.StopTimer()
// 'b' is between 'a' and 'c', so the charclass
// range checking is no help here.
x := strings.Repeat("bbbb", 20) + "c"
re := MustCompile("[ac]", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
/*
func BenchmarkReplaceAll(b *testing.B) {
x := "abcdefghijklmnopqrstuvwxyz"
b.StopTimer()
re := MustCompile("[cjrw]", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
re.ReplaceAllString(x, "")
}
}
*/
func BenchmarkAnchoredLiteralShortNonMatch(b *testing.B) {
b.StopTimer()
x := "abcdefghijklmnopqrstuvwxyz"
re := MustCompile("^zbc(d|e)", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); m || err != nil {
b.Fatalf("unexpected match or error! %v", err)
}
}
}
func BenchmarkAnchoredLiteralLongNonMatch(b *testing.B) {
b.StopTimer()
data := "abcdefghijklmnopqrstuvwxyz"
x := make([]rune, 32768*len(data))
for i := 0; i < 32768; /*(2^15)*/ i++ {
for j := 0; j < len(data); j++ {
x[i*len(data)+j] = rune(data[j])
}
}
re := MustCompile("^zbc(d|e)", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchRunes(x); m || err != nil {
b.Fatalf("unexpected match or error! %v", err)
}
}
}
func BenchmarkAnchoredShortMatch(b *testing.B) {
b.StopTimer()
x := "abcdefghijklmnopqrstuvwxyz"
re := MustCompile("^.bc(d|e)", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkAnchoredLongMatch(b *testing.B) {
b.StopTimer()
data := "abcdefghijklmnopqrstuvwxyz"
x := make([]rune, 32768*len(data))
for i := 0; i < 32768; /*(2^15)*/ i++ {
for j := 0; j < len(data); j++ {
x[i*len(data)+j] = rune(data[j])
}
}
re := MustCompile("^.bc(d|e)", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchRunes(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkOnePassShortA(b *testing.B) {
b.StopTimer()
x := "abcddddddeeeededd"
re := MustCompile("^.bc(d|e)*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkNotOnePassShortA(b *testing.B) {
b.StopTimer()
x := "abcddddddeeeededd"
re := MustCompile(".bc(d|e)*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkOnePassShortB(b *testing.B) {
b.StopTimer()
x := "abcddddddeeeededd"
re := MustCompile("^.bc(?:d|e)*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkNotOnePassShortB(b *testing.B) {
b.StopTimer()
x := "abcddddddeeeededd"
re := MustCompile(".bc(?:d|e)*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkOnePassLongPrefix(b *testing.B) {
b.StopTimer()
x := "abcdefghijklmnopqrstuvwxyz"
re := MustCompile("^abcdefghijklmnopqrstuvwxyz.*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
func BenchmarkOnePassLongNotPrefix(b *testing.B) {
b.StopTimer()
x := "abcdefghijklmnopqrstuvwxyz"
re := MustCompile("^.bcdefghijklmnopqrstuvwxyz.*$", 0)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := re.MatchString(x); !m || err != nil {
b.Fatalf("no match or error! %v", err)
}
}
}
var text []rune
func makeText(n int) []rune {
if len(text) >= n {
return text[:n]
}
text = make([]rune, n)
x := ^uint32(0)
for i := range text {
x += x
x ^= 1
if int32(x) < 0 {
x ^= 0x88888eef
}
if x%31 == 0 {
text[i] = '\n'
} else {
text[i] = rune(x%(0x7E+1-0x20) + 0x20)
}
}
return text
}
func benchmark(b *testing.B, re string, n int) {
r := MustCompile(re, 0)
t := makeText(n)
b.ResetTimer()
b.SetBytes(int64(n))
for i := 0; i < b.N; i++ {
if m, err := r.MatchRunes(t); m {
b.Fatal("match!")
} else if err != nil {
b.Fatalf("Err %v", err)
}
}
}
const (
easy0 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
easy1 = "A[AB]B[BC]C[CD]D[DE]E[EF]F[FG]G[GH]H[HI]I[IJ]J$"
medium = "[XYZ]ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
hard = "[ -~]*ABCDEFGHIJKLMNOPQRSTUVWXYZ$"
hard1 = "ABCD|CDEF|EFGH|GHIJ|IJKL|KLMN|MNOP|OPQR|QRST|STUV|UVWX|WXYZ"
parens = "([ -~])*(A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K)(L)(M)" +
"(N)(O)(P)(Q)(R)(S)(T)(U)(V)(W)(X)(Y)(Z)$"
)
func BenchmarkMatchEasy0_32(b *testing.B) { benchmark(b, easy0, 32<<0) }
func BenchmarkMatchEasy0_1K(b *testing.B) { benchmark(b, easy0, 1<<10) }
func BenchmarkMatchEasy0_32K(b *testing.B) { benchmark(b, easy0, 32<<10) }
func BenchmarkMatchEasy0_1M(b *testing.B) { benchmark(b, easy0, 1<<20) }
func BenchmarkMatchEasy0_32M(b *testing.B) { benchmark(b, easy0, 32<<20) }
func BenchmarkMatchEasy1_32(b *testing.B) { benchmark(b, easy1, 32<<0) }
func BenchmarkMatchEasy1_1K(b *testing.B) { benchmark(b, easy1, 1<<10) }
func BenchmarkMatchEasy1_32K(b *testing.B) { benchmark(b, easy1, 32<<10) }
func BenchmarkMatchEasy1_1M(b *testing.B) { benchmark(b, easy1, 1<<20) }
func BenchmarkMatchEasy1_32M(b *testing.B) { benchmark(b, easy1, 32<<20) }
func BenchmarkMatchMedium_32(b *testing.B) { benchmark(b, medium, 32<<0) }
func BenchmarkMatchMedium_1K(b *testing.B) { benchmark(b, medium, 1<<10) }
func BenchmarkMatchMedium_32K(b *testing.B) { benchmark(b, medium, 32<<10) }
func BenchmarkMatchMedium_1M(b *testing.B) { benchmark(b, medium, 1<<20) }
func BenchmarkMatchMedium_32M(b *testing.B) { benchmark(b, medium, 32<<20) }
func BenchmarkMatchHard_32(b *testing.B) { benchmark(b, hard, 32<<0) }
func BenchmarkMatchHard_1K(b *testing.B) { benchmark(b, hard, 1<<10) }
func BenchmarkMatchHard_32K(b *testing.B) { benchmark(b, hard, 32<<10) }
func BenchmarkMatchHard_1M(b *testing.B) { benchmark(b, hard, 1<<20) }
func BenchmarkMatchHard_32M(b *testing.B) { benchmark(b, hard, 32<<20) }
func BenchmarkMatchHard1_32(b *testing.B) { benchmark(b, hard1, 32<<0) }
func BenchmarkMatchHard1_1K(b *testing.B) { benchmark(b, hard1, 1<<10) }
func BenchmarkMatchHard1_32K(b *testing.B) { benchmark(b, hard1, 32<<10) }
func BenchmarkMatchHard1_1M(b *testing.B) { benchmark(b, hard1, 1<<20) }
func BenchmarkMatchHard1_32M(b *testing.B) { benchmark(b, hard1, 32<<20) }
// TestProgramTooLongForBacktrack tests that a regex which is too long
// for the backtracker still executes properly.
func TestProgramTooLongForBacktrack(t *testing.T) {
longRegex := MustCompile(`(one|two|three|four|five|six|seven|eight|nine|ten|eleven|twelve|thirteen|fourteen|fifteen|sixteen|seventeen|eighteen|nineteen|twenty|twentyone|twentytwo|twentythree|twentyfour|twentyfive|twentysix|twentyseven|twentyeight|twentynine|thirty|thirtyone|thirtytwo|thirtythree|thirtyfour|thirtyfive|thirtysix|thirtyseven|thirtyeight|thirtynine|forty|fortyone|fortytwo|fortythree|fortyfour|fortyfive|fortysix|fortyseven|fortyeight|fortynine|fifty|fiftyone|fiftytwo|fiftythree|fiftyfour|fiftyfive|fiftysix|fiftyseven|fiftyeight|fiftynine|sixty|sixtyone|sixtytwo|sixtythree|sixtyfour|sixtyfive|sixtysix|sixtyseven|sixtyeight|sixtynine|seventy|seventyone|seventytwo|seventythree|seventyfour|seventyfive|seventysix|seventyseven|seventyeight|seventynine|eighty|eightyone|eightytwo|eightythree|eightyfour|eightyfive|eightysix|eightyseven|eightyeight|eightynine|ninety|ninetyone|ninetytwo|ninetythree|ninetyfour|ninetyfive|ninetysix|ninetyseven|ninetyeight|ninetynine|onehundred)`, 0)
if m, err := longRegex.MatchString("two"); !m {
t.Errorf("longRegex.MatchString(\"two\") was false, want true")
} else if err != nil {
t.Errorf("Error: %v", err)
}
if m, err := longRegex.MatchString("xxx"); m {
t.Errorf("longRegex.MatchString(\"xxx\") was true, want false")
} else if err != nil {
t.Errorf("Error: %v", err)
}
}
func BenchmarkLeading(b *testing.B) {
b.StopTimer()
r := MustCompile("[a-q][^u-z]{13}x", 0)
inp := makeText(1000000)
b.StartTimer()
for i := 0; i < b.N; i++ {
if m, err := r.MatchRunes(inp); !m {
b.Errorf("Expected match")
} else if err != nil {
b.Errorf("Error: %v", err)
}
}
}
|