Class: Ngt::Optimizer

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/ngt/optimizer.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils

ffi

Constructor Details

#initialize(outgoing: 10, incoming: 120, queries: 100, low_accuracy_from: 0.3, low_accuracy_to: 0.5, high_accuracy_from: 0.8, high_accuracy_to: 0.9, gt_epsilon: 0.1, merge: 0.2) ⇒ Optimizer

Returns a new instance of Optimizer.

Raises:



5
6
7
8
9
10
11
12
13
14
15
 
# File 'lib/ngt/optimizer.rb', line 5

def initialize(outgoing: 10, incoming: 120, queries: 100, low_accuracy_from: 0.3, low_accuracy_to: 0.5, high_accuracy_from: 0.8, high_accuracy_to: 0.9, gt_epsilon: 0.1, merge: 0.2)
  raise Error, "Upgrade to NGT 1.8.1+ to use the optimizer" unless FFI.respond_to?(:ngt_create_optimizer)

  @error = FFI.ngt_create_error_object
  @optimizer = ffi(:ngt_create_optimizer, true)

  ffi(:ngt_optimizer_set, @optimizer, outgoing, incoming, queries, low_accuracy_from,
    low_accuracy_to, high_accuracy_from, high_accuracy_to, gt_epsilon, merge)

  ObjectSpace.define_finalizer(self, self.class.finalize(@optimizer, @error))
end

Class Method Details

.finalize(optimizer, error) ⇒ Object 



25
26
27
28
29
30
31
 
# File 'lib/ngt/optimizer.rb', line 25

def self.finalize(optimizer, error)
  # must use proc instead of stabby lambda
  proc do
    FFI.ngt_destroy_optimizer(optimizer)
    FFI.ngt_destroy_error_object(error)
  end
end

Instance Method Details

#adjust_search_coefficients(index_path) ⇒ Object 



21
22
23
 
# File 'lib/ngt/optimizer.rb', line 21

def adjust_search_coefficients(index_path)
  ffi(:ngt_optimizer_adjust_search_coefficients, @optimizer, path(index_path))
end

#execute(in_index_path, out_index_path) ⇒ Object 



17
18
19
 
# File 'lib/ngt/optimizer.rb', line 17

def execute(in_index_path, out_index_path)
  ffi(:ngt_optimizer_execute, @optimizer, path(in_index_path), out_index_path)
end