Class: RerankerRuby::Batch

Inherits:
Object
  • Object
show all
Defined in:
lib/reranker_ruby/batch.rb

Overview

Batch reranking — run multiple queries against the same document set concurrently.

Usage:

results = RerankerRuby::Batch.rerank(reranker, queries, documents, top_k: 5, threads: 4)
results[0]  # => results for queries[0]
results[1]  # => results for queries[1]

Class Method Summary collapse

Class Method Details

.rerank(reranker, queries, documents, top_k: 10, threads: 4) ⇒ Array<Array<Result>>

Returns results per query.

Parameters:

  • reranker (Base) —

    any reranker instance

  • queries (Array<String>) —

    list of queries

  • documents (Array) —

    shared document set

  • top_k (Integer) (defaults to: 10) —

    number of results per query

  • threads (Integer) (defaults to: 4) —

    concurrency level

Returns:

  • (Array<Array<Result>>) —

    results per query



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# File 'lib/reranker_ruby/batch.rb', line 18

def self.rerank(reranker, queries, documents, top_k: 10, threads: 4)
  if threads <= 1
    return queries.map { |q| reranker.rerank(q, documents, top_k: top_k) }
  end

  results = Array.new(queries.length)
  errors = []
  mutex = Mutex.new
  queue = Queue.new

  queries.each_with_index { |q, i| queue << [q, i] }
  threads.times { queue << nil } # sentinel values

  workers = threads.times.map do
    Thread.new do
      while (item = queue.pop)
        begin
          query, idx = item
          result = reranker.rerank(query, documents, top_k: top_k)
          mutex.synchronize { results[idx] = result }
        rescue => e
          mutex.synchronize { errors << e }
        end
      end
    end
  end

  workers.each(&:join)
  raise errors.first if errors.any?
  results
end