Created
October 30, 2012 20:45
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Guid compression
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| static string compressGuid(Guid guid) | |
| { | |
| // "MspzuC2oLkKjoUEgZrbJFg==" | |
| return Convert.ToBase64String(guid.ToByteArray()) | |
| .Substring(0, 22) | |
| .Replace('+', '-') | |
| .Replace('/', '_'); | |
| } | |
| static Guid expandGuid(string compressedGuid) | |
| { | |
| string base64 = compressedGuid | |
| .Replace('_', '/') | |
| .Replace('-', '+') | |
| + "=="; | |
| var bytes = Convert.FromBase64String(base64); | |
| return new Guid(bytes); | |
| } |
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Agree, @trejkaz , however I believe compressing Guid string representations could be useful for more space-effective tagging of transactions/requests in logs (where GUID woud be represented with it's ToString() result instead of 8 bytes in memory). Frankly, I don't think this can be done more efficiently, because it's already raw bytes represented with human-readable characters, because it's not Guid's ToString being converted, but instead it's ToByteArray().
Perhaps, smaz could do a better job. I never tried it though.
Or, use more of the alphabet! However, it definitely defeats the purpose, because the more of the alphabet is used, the less distinguishable the end-result becomes.