private ConcurrentDictionary <IModelReference, ResultEntryAccumulator> GetSimilaritiesUsingBatchedStrategy(IEnumerable <HashedFingerprint> queryFingerprints, QueryConfiguration configuration, IModelService modelService)
{
var hashedFingerprints = queryFingerprints as List <HashedFingerprint> ?? queryFingerprints.ToList();
var allCandidates = modelService.ReadSubFingerprints(hashedFingerprints.Select(querySubfingerprint => querySubfingerprint.HashBins), configuration);
var hammingSimilarities = new ConcurrentDictionary <IModelReference, ResultEntryAccumulator>();
Parallel.ForEach(hashedFingerprints, queryFingerprint =>
{
var subFingerprints = allCandidates.Where(candidate => queryMath.IsCandidatePassingThresholdVotes(queryFingerprint, candidate, configuration.ThresholdVotes));
similarityUtility.AccumulateHammingSimilarity(subFingerprints, queryFingerprint, hammingSimilarities, configuration.FingerprintConfiguration.HashingConfig.NumberOfMinHashesPerTable);
});
return(hammingSimilarities);
}
private GroupedQueryResults GetSimilaritiesUsingBatchedStrategy(IEnumerable <HashedFingerprint> queryFingerprints, QueryConfiguration configuration, IModelService modelService)
{
var hashedFingerprints = queryFingerprints as List <HashedFingerprint> ?? queryFingerprints.ToList();
var allCandidates = modelService.ReadSubFingerprints(hashedFingerprints.Select(querySubfingerprint => querySubfingerprint.HashBins), configuration);
var groupedResults = new GroupedQueryResults(hashedFingerprints);
int hashesPerTable = configuration.FingerprintConfiguration.HashingConfig.NumberOfMinHashesPerTable;
Parallel.ForEach(hashedFingerprints, queryFingerprint =>
{
var subFingerprints = allCandidates.Where(candidate => queryMath.IsCandidatePassingThresholdVotes(queryFingerprint, candidate, configuration.ThresholdVotes));
foreach (var subFingerprint in subFingerprints)
{
int hammingSimilarity = similarityUtility.CalculateHammingSimilarity(queryFingerprint.HashBins, subFingerprint.Hashes, hashesPerTable);
groupedResults.Add(queryFingerprint, subFingerprint, hammingSimilarity);
}
});
return(groupedResults);
}