method

assert_performance_constant

v2_1_10 - Show latest stable - 0 notes - Class: TestCase

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10 (0)
2_2_9
2_4_6
2_5_5
2_6_3
What's this?

assert_performance_constant(threshold = 0.99, &work) public

Runs the given work and asserts that the times gathered fit to match a constant rate (eg, linear slope == 0) within a given threshold. Note: because we’re testing for a slope of 0, R^2 is not a good determining factor for the fit, so the threshold is applied against the slope itself. As such, you probably want to tighten it from the default.

See http://www.graphpad.com/curvefit/goodness_of_fit.htm for more details.

Fit is calculated by #fit_linear.

Ranges are specified by ::bench_range.

Eg:

def bench_algorithm
  assert_performance_constant 0.9999 do |n|
    @obj.algorithm(n)
  end
end

Show source

# File lib/minitest/benchmark.rb, line 133
    def assert_performance_constant threshold = 0.99, &work
      validation = proc do |range, times|
        a, b, rr = fit_linear range, times
        assert_in_delta 0, b, 1 - threshold
        [a, b, rr]
      end

      assert_performance validation, &work
    end

assert_performance_constant

Related methods