7cd9063b52
- source files and Makefiles need never be executable - scripts are run directly by their interpreters in the test suites, so also do not need to be executable
67 lines
1.5 KiB
Ruby
67 lines
1.5 KiB
Ruby
#!/usr/bin/env ruby
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require 'benchmark'
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require 'li_std_speed'
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include Li_std_speed
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def benchmark(f, phigh, sequences)
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print f.class
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puts '%10s ' % 'n' + sequences.inject('') { |a,s| a << '%10s' % s.class }
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0.upto(phigh-1) do |p|
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n = 2**p
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print "%10d"%n
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$stdout.flush
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for s in sequences
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cont = s.new((0..n).to_a)
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Benchmark.benchmark { f.call(cont) }
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end
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end
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end
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def iterate(cont)
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# expected: O(n)
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# got: O(n**2) for set/list (vector/deque fine)
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it = cont.begin
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last = cont.end
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while it != last
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it.next
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end
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end
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def erase(cont)
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# expected: O(n)
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# got: O(n**2) for vector/deque and O(n**3) for set/list
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it = cont.end
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# can't reuse begin since it might get invalidated
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while it != cont.begin
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it.previous
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# set returns None, so need to reobtain end
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it = cont.erase(it) or cont.end
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end
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end
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def insert(cont)
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it = cont.end
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size = cont.size
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if cont.kind_of? RbSet
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# swig stl missing hint version of insert for set
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# expected would be O(n) with iterator hint version
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# expected: O(n*log(n))
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# got: O(n**3*log(n))
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size.upto(size<<1) { |x| cont.insert(x) }
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else
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# expected: O(n)
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# got: O(n**3) for list (vector/deque fine)
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size.upto(size<<1) { |x| cont.push(x) }
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end
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end
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if $0 == __FILE__
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sequences = [RbVector,RbDeque,RbSet,RbList]
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for f,phigh in [[method(:iterate),15], [method(:insert),15],
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[method(:erase),11]]
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benchmark(f, phigh, sequences)
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end
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end
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