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Contents
module LabTech
class Speedup
attr_reader :baseline, :comparison, :time, :factor
def self.compute_time_delta(baseline, comparison)
return nil if baseline.nil?
return nil if comparison.nil?
baseline.to_f - comparison.to_f
end
def self.compute_factor(baseline, comparison)
# Timing data should never be zero
return nil if [ baseline, comparison ].any? { |e| e.to_f.zero? }
time = compute_time_delta(baseline, comparison)
return nil if time.nil?
case
when time > 0 ; +1 * baseline / comparison
when time.zero? ; 0
when time < 0 ; -1 * comparison / baseline
end
end
def initialize(baseline: nil, comparison: nil, time: nil, factor: nil)
@baseline = baseline &.to_f
@comparison = comparison &.to_f
@time = time &.to_f || compute_time_delta
@factor = factor &.to_f || compute_factor
end
include Comparable
def <=>(other)
return nil unless other.kind_of?(self.class)
return nil if self .factor.nil?
return other if other.factor.nil?
self.factor <=> other.factor
end
def valid?
return false if time.nil?
return false if factor.nil?
expected_time_delta = compute_time_delta
expected_factor = compute_factor
return false if expected_time_delta && ( time != expected_time_delta )
return false if expected_factor && ( factor != expected_factor )
true
end
private
def compute_time_delta
self.class.compute_time_delta(baseline, comparison)
end
def compute_factor
self.class.compute_factor(baseline, comparison)
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems