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From GitBox <>
Subject [GitHub] [lucenenet] theolivenbaum opened a new issue #377: Use pooling on BooleanScorer.BucketTable
Date Mon, 19 Oct 2020 19:31:50 GMT

theolivenbaum opened a new issue #377:

   I've measured some significant number of allocations due to the usage of BooleanScorer,
that can trace back to the inner class [BucketTable](
           internal sealed class BucketTable
               public static readonly int SIZE = 1 << 11;
               public static readonly int MASK = SIZE - 1;
               internal readonly Bucket[] buckets = new Bucket[SIZE];
               internal Bucket first = null; // head of valid list
               public BucketTable()
                   // Pre-fill to save the lazy init when collecting
                   // each sub:
                   for (int idx = 0; idx < SIZE; idx++)
                       buckets[idx] = new Bucket();
   I've experimented today with using an object pool to avoid repeatedly allocating BucketTable
instances, and the only public API change is for BulkScorer to implement IDisposable. 
   @NightOwl888 any immediate restrictions against it? If not happy to open a pull request.

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