Additional debug info

feature-optimized-md5
Inga 🏳‍🌈 7 years ago
parent 5d2cd465d4
commit ccf6f216c3
  1. 8
      README.md
  2. 11
      WhiteRabbit/Program.cs

@ -22,9 +22,9 @@ That's why the given hashes are solved much sooner than it takes to check all an
Single-threaded performance on Sandy Bridge @2.8GHz is as follows:
* If only phrases of at most 3 words are allowed, then it takes 2.5 seconds to find and check all anagrams; all relevant hashes are solved in first 0.4 seconds;
* If only phrases of at most 3 words are allowed, then it takes 2.5 seconds to find and check all 4560 anagrams; all relevant hashes are solved in first 0.4 seconds;
* If phrases of 4 words are allowed as well, then it takes 40 seconds to find and check all anagrams; all hashes are solved in first 3 seconds;
* If phrases of 4 words are allowed as well, then it takes 40 seconds to find and check all 7433016 anagrams; all hashes are solved in first 3 seconds;
For comparison, certain other solutions available on GitHub seem to require 3 hours to find all 3-word anagrams (i.e. this solution is faster by a factor of 4000 in 3-word case).
@ -32,10 +32,12 @@ Anagrams generation is not parallelized, as even single-threaded performance for
Multi-threaded performance with RyuJIT (.NET 4.6, 64-bit system) is as follows:
* If only phrases of at most 4 words are allowed, then it takes less than 10 seconds to find and check all anagrams; all hashes are solved in first 1 second.
* If only phrases of at most 4 words are allowed, then it takes less than 10 seconds to find and check all 7433016 anagrams; all hashes are solved in first 1 second.
* If phrases of 5 words are allowed as well, then it takes around 18 minutes to find and check all anagrams; all hashes are solved in first 25 seconds. Most of time is spent on MD5 computations for correct anagrams, so there is not a lot to optimize further.
* If phrases of 6 words are allowed as well, then "more difficult" hash is solved in 50 seconds, "easiest" in 3.5 minutes, and "hard" in 6 minutes.
* If phrases of 7 words are allowed as well, then "more difficult" hash is solved in 6 minutes.
Note that all measurements were done on a Release build; Debug build is significantly slower.

@ -36,16 +36,21 @@
var processor = new StringsProcessor(Encoding.ASCII.GetBytes(SourcePhrase), MaxWordsInPhrase, ReadInput());
Console.WriteLine($"Initialization complete; time spent: {stopwatch.Elapsed}");
Console.WriteLine($"Initialization complete; time from start: {stopwatch.Elapsed}");
#if DEBUG
var totalAnagramsCount = processor.GeneratePhrases().Count();
Console.WriteLine($"Total anagrams count: {totalAnagramsCount}; time from start: {stopwatch.Elapsed}");
#endif
processor.GeneratePhrases()
.Select(phraseBytes => new { phraseBytes, hashVector = ComputeHashVector(phraseBytes) })
.Where(tuple => expectedHashesAsVectors.Contains(tuple.hashVector))
.Select(tuple => new { phrase = Encoding.ASCII.GetString(tuple.phraseBytes), hash = VectorToHexadecimalString(tuple.hashVector) })
.ForAll(phraseInfo => Console.WriteLine($"Found phrase for {phraseInfo.hash}: {phraseInfo.phrase} (spent {stopwatch.Elapsed})"));
.ForAll(phraseInfo => Console.WriteLine($"Found phrase for {phraseInfo.hash}: {phraseInfo.phrase}; time from start is {stopwatch.Elapsed}"));
stopwatch.Stop();
Console.WriteLine($"Total time spent: {stopwatch.Elapsed}");
Console.WriteLine($"Done; time from start: {stopwatch.Elapsed}");
}
// Code taken from http://stackoverflow.com/a/321404/831314

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