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Provide competitive .NET Core implementation #1

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merged 2 commits into from Mar 16, 2019

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tkp1n commented Mar 13, 2019

So I stumbled over your repository and the original challenge from Trustpilot. I really like your approach to the challenge!
I do however propose a more competitive implementation in this PR.

Changes include:

  • Avoid the use of allocation heavy Streams and strings on the hot path of the Main method and allow the re-use of a single plaintext buffer
  • Avoid the encoding of every decrypted ciphertext by searching for the ASCII values of "trust" in the plaintext buffer
  • Only encode the plaintext buffer, once a possible solution was found

I'll let you discover the performance difference yourself :)

tkp1n added some commits Mar 13, 2019

Speed-up .NET Core implementation
* Avoid the use of Streams on the hot path of the Main mehtod and allow the re-use of a single plaintext buffer
* Avoid the encoding of every decrypted ciphertext by searching for the ASCII values of "trust" in the plaintext buffer
* Only encode the plaintext buffer, once a possible solution was found

@ronnieholm ronnieholm merged commit 160505b into ronnieholm:master Mar 16, 2019

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ronnieholm commented Mar 16, 2019

Thanks. That's an impressive speedup. I read your post (https://ndportmann.com/improving-dotnet-crypto-code) as well.

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