The process to calculate the Levenshtien distance of each element of a large data set with every other...












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I am trying to optimize the process to calculate the Levenshtien distance of each element of a huge list of data called "ListA" with every other element of another list called "ListB". However the code that I have written for this process takes a lot of time when I increase the data in any of the datasets. I need to optimize the process for huge data sets. Please advise where do I need to make the improvements.



//Split the ListA data to smaller chunks and loop through those chunks 
var splitGroupSize = 1000;
var sourceDataBatchesCount = ListA.Count / splitGroupSize;

// Loop through the smaller chunks
for (int b = 0; b < sourceDataBatchesCount; b++)
{
var currentBatchMatchedWords = new List<Tuple<long, string, string, string, string, string, double>>();
int skipRowCount = b * splitGroupSize;
int takeRowCount = splitGroupSize;

// Get chunks of data from ListA according to the skipRowCount and takeRowCount
var currentSourceDataBatch = FuzzyMatchRepository.FetchSourceDataBatch(skipRowCount, takeRowCount);

//Loop through the ListB and parallely calculate the distance between chunks of List A and List B data
for (int i = 0; i < ListB.Count; i++)
{
Parallel.For(
0,
currentSourceDataBatch.Count,
new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount * 10 },
cntr =>
{
try
{
// call the Levenshtien Algorithm to calculate the distance between each element of ListB and the smaller chunk of List A.
double similarity = LevenshteinDistance(currentSourceDataBatch[cntr], ListB[i]);
if (similarity >= 70)
{
// save the data in tuple.
}
cntr++;
}
catch (Exception ex)
{
exceptions.Enqueue(ex);
}
});
}
}









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    $begingroup$


    I am trying to optimize the process to calculate the Levenshtien distance of each element of a huge list of data called "ListA" with every other element of another list called "ListB". However the code that I have written for this process takes a lot of time when I increase the data in any of the datasets. I need to optimize the process for huge data sets. Please advise where do I need to make the improvements.



    //Split the ListA data to smaller chunks and loop through those chunks 
    var splitGroupSize = 1000;
    var sourceDataBatchesCount = ListA.Count / splitGroupSize;

    // Loop through the smaller chunks
    for (int b = 0; b < sourceDataBatchesCount; b++)
    {
    var currentBatchMatchedWords = new List<Tuple<long, string, string, string, string, string, double>>();
    int skipRowCount = b * splitGroupSize;
    int takeRowCount = splitGroupSize;

    // Get chunks of data from ListA according to the skipRowCount and takeRowCount
    var currentSourceDataBatch = FuzzyMatchRepository.FetchSourceDataBatch(skipRowCount, takeRowCount);

    //Loop through the ListB and parallely calculate the distance between chunks of List A and List B data
    for (int i = 0; i < ListB.Count; i++)
    {
    Parallel.For(
    0,
    currentSourceDataBatch.Count,
    new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount * 10 },
    cntr =>
    {
    try
    {
    // call the Levenshtien Algorithm to calculate the distance between each element of ListB and the smaller chunk of List A.
    double similarity = LevenshteinDistance(currentSourceDataBatch[cntr], ListB[i]);
    if (similarity >= 70)
    {
    // save the data in tuple.
    }
    cntr++;
    }
    catch (Exception ex)
    {
    exceptions.Enqueue(ex);
    }
    });
    }
    }









    share|improve this question







    New contributor




    Shahid is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







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      0





      $begingroup$


      I am trying to optimize the process to calculate the Levenshtien distance of each element of a huge list of data called "ListA" with every other element of another list called "ListB". However the code that I have written for this process takes a lot of time when I increase the data in any of the datasets. I need to optimize the process for huge data sets. Please advise where do I need to make the improvements.



      //Split the ListA data to smaller chunks and loop through those chunks 
      var splitGroupSize = 1000;
      var sourceDataBatchesCount = ListA.Count / splitGroupSize;

      // Loop through the smaller chunks
      for (int b = 0; b < sourceDataBatchesCount; b++)
      {
      var currentBatchMatchedWords = new List<Tuple<long, string, string, string, string, string, double>>();
      int skipRowCount = b * splitGroupSize;
      int takeRowCount = splitGroupSize;

      // Get chunks of data from ListA according to the skipRowCount and takeRowCount
      var currentSourceDataBatch = FuzzyMatchRepository.FetchSourceDataBatch(skipRowCount, takeRowCount);

      //Loop through the ListB and parallely calculate the distance between chunks of List A and List B data
      for (int i = 0; i < ListB.Count; i++)
      {
      Parallel.For(
      0,
      currentSourceDataBatch.Count,
      new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount * 10 },
      cntr =>
      {
      try
      {
      // call the Levenshtien Algorithm to calculate the distance between each element of ListB and the smaller chunk of List A.
      double similarity = LevenshteinDistance(currentSourceDataBatch[cntr], ListB[i]);
      if (similarity >= 70)
      {
      // save the data in tuple.
      }
      cntr++;
      }
      catch (Exception ex)
      {
      exceptions.Enqueue(ex);
      }
      });
      }
      }









      share|improve this question







      New contributor




      Shahid is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      I am trying to optimize the process to calculate the Levenshtien distance of each element of a huge list of data called "ListA" with every other element of another list called "ListB". However the code that I have written for this process takes a lot of time when I increase the data in any of the datasets. I need to optimize the process for huge data sets. Please advise where do I need to make the improvements.



      //Split the ListA data to smaller chunks and loop through those chunks 
      var splitGroupSize = 1000;
      var sourceDataBatchesCount = ListA.Count / splitGroupSize;

      // Loop through the smaller chunks
      for (int b = 0; b < sourceDataBatchesCount; b++)
      {
      var currentBatchMatchedWords = new List<Tuple<long, string, string, string, string, string, double>>();
      int skipRowCount = b * splitGroupSize;
      int takeRowCount = splitGroupSize;

      // Get chunks of data from ListA according to the skipRowCount and takeRowCount
      var currentSourceDataBatch = FuzzyMatchRepository.FetchSourceDataBatch(skipRowCount, takeRowCount);

      //Loop through the ListB and parallely calculate the distance between chunks of List A and List B data
      for (int i = 0; i < ListB.Count; i++)
      {
      Parallel.For(
      0,
      currentSourceDataBatch.Count,
      new ParallelOptions { MaxDegreeOfParallelism = Environment.ProcessorCount * 10 },
      cntr =>
      {
      try
      {
      // call the Levenshtien Algorithm to calculate the distance between each element of ListB and the smaller chunk of List A.
      double similarity = LevenshteinDistance(currentSourceDataBatch[cntr], ListB[i]);
      if (similarity >= 70)
      {
      // save the data in tuple.
      }
      cntr++;
      }
      catch (Exception ex)
      {
      exceptions.Enqueue(ex);
      }
      });
      }
      }






      c# performance






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      Shahid is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Shahid is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question




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      asked 14 mins ago









      ShahidShahid

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      New contributor




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      New contributor





      Shahid is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






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      Check out our Code of Conduct.






















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