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  1. using System;
  2. using System.Linq;
  3. using System.Collections.Generic;
  4. using System.Diagnostics;
  5. using System.Text.RegularExpressions;
  6.  
  7. public class Test
  8. {
  9. public static void Main()
  10.         {
  11.             var hoge = "あいうえおかきくけこさしすせそたちつてとちゃちゅちょ";
  12.             var originalString = "";
  13.             for (int i = 0; i < 100; i++)
  14.             {
  15.                 originalString += hoge;
  16.             }
  17.  
  18.             var sw = new Stopwatch();
  19.  
  20.             var kana = "ちゃ|ちゅ|ちょ|あ|い|う|え|お|か|き|く|け|こ|さ|し|す|せ|そ|た|ち|つ|て|と";
  21.             var roman = "Cha|Chu|Cho|A|I|U|E|O|Ka|Ki|Ku|Ke|Ko|Sa|Shi|Su|Se|So|Ta|Chi|Tsu|Te|To";
  22.             var dic = kana.Split('|').Zip(roman.Split('|'), (l, r) => new { Key = l, Value = r }).ToDictionary(x => x.Key, x => x.Value);
  23.  
  24.             var kana2 = new Dictionary<string, string>() { { "ちゃ", "Cha" }, { "ちゅ", "Chu" }, { "ちょ", "Cho" } };
  25.             var kana1 = new Dictionary<string, string>()
  26.             {
  27.                 { "あ", "A" }, { "い", "I" }, { "う", "U" }, { "え", "E" }, { "お", "O" },
  28.                 { "か", "Ka" }, { "き", "Ki" }, { "く", "Ku" }, { "け", "Ke" }, { "こ", "Ko" },
  29.                 { "さ", "Sa" }, { "し", "Shi" }, { "す", "Su" }, { "せ", "Se" }, { "そ", "So" },
  30.                 { "た", "Ta" }, { "ち", "Chi" }, { "つ", "Tsu" }, { "て", "Te" }, { "と", "To" },
  31.             };
  32.  
  33.             for (int i = 0; i < 3; i++)
  34.             {
  35.                 sw.Restart();
  36.                 var replaceString = new System.Text.StringBuilder();
  37.                 for (int j = 0; j < originalString.Length; j++)
  38.                 {
  39.                     if (kana2.TryGetValue(originalString.Substring(j, 2), out var value1))
  40.                     {
  41.                         replaceString.Append(value1);
  42.                         j++;
  43.                     }
  44.                     else
  45.                     {
  46.                         if (kana1.TryGetValue(originalString.Substring(j, 1), out var value2))
  47.                         {
  48.                             replaceString.Append(value2);
  49.                         }
  50.                     }
  51.                 }
  52.                 var ver1 = replaceString.ToString();
  53.                 sw.Stop();
  54.                 Console.WriteLine($"Replace({i}) Elapsed Time:{sw.Elapsed}");
  55.  
  56.                 sw.Restart();
  57.                 var ver2 = Regex.Replace(originalString, $"({kana})", match => dic[match.Value]);
  58.                 sw.Stop();
  59.                 Console.WriteLine($"Regex  ({i}) Elapsed Time:{sw.Elapsed}");
  60.  
  61.                 if (ver1 != ver2) throw new Exception();
  62.             }
  63.         }
  64. }
Success #stdin #stdout 0.08s 25260KB
comments (?)
stdin
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Standard input is empty
stdout
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Replace(0) Elapsed Time:00:00:00.0010331
Regex  (0) Elapsed Time:00:00:00.0487896
Replace(1) Elapsed Time:00:00:00.0007018
Regex  (1) Elapsed Time:00:00:00.0023549
Replace(2) Elapsed Time:00:00:00.0006949
Regex  (2) Elapsed Time:00:00:00.0022229
https://ideone.com/c7ILX4
language:
C# (gmcs 5.20.1)
created:
4 years ago
visibility:
public

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