1 files changed, 85 insertions, 0 deletions
diff --git a/Examples/test-suite/ruby/ruby_li_std_speed_runme.rb b/Examples/test-suite/ruby/ruby_li_std_speed_runme.rb
new file mode 100755
index 0000000..825f3c5
--- /dev/null
+++ b/Examples/test-suite/ruby/ruby_li_std_speed_runme.rb
@@ -0,0 +1,85 @@
+#!/usr/bin/env ruby
+#
+# This is a simple speed benchmark suite for std containers,
+# to verify their O(n) performance.
+# It is not part of the standard tests.
+#
+# License::   SWIG
+#
+
+
+require 'benchmark'
+require 'mathn'
+require 'ruby_li_std_speed'
+include Ruby_li_std_speed
+
+
+def benchmark(f, phigh, sequences)
+  puts f
+  print '%10s' % 'n'
+  maxlen = sequences.max { |a,b| a.to_s.size <=> b.to_s.size }
+  maxlen = maxlen.to_s.size - 12
+  sequences.each { |s| print "%#{maxlen}s" % "#{s.to_s.sub(/.*::/,'')}" }
+  puts
+  o_perf = Array.new(sequences.size, 0)
+  last_t = Array.new(sequences.size, nil)
+  1.upto(phigh) do |p|
+    n = 2**(p-1)
+    print "%10d" % n
+    sequences.each_with_index do |s, i|
+      cont = s.new((0..n).to_a)
+      Benchmark.benchmark('',0,"%#{maxlen-2}.6r") { |x|
+        t = x.report { f.call(cont) }
+        o_perf[i] += last_t[i] ? (t.real / last_t[i]) : t.real
+        last_t[i] = t.real
+      }
+    end
+    puts
+  end
+
+  print "  avg. O(n)"
+  base = 1.0 / Math.log(2.0)
+  sequences.each_with_index do |s, i|
+    o_perf[i] /= phigh
+    # o_perf[i] = 1 if o_perf[i] < 1
+    o_perf[i]  = Math.log(o_perf[i]) * base
+    print "%#{maxlen-1}.2f " % o_perf[i]
+  end
+  puts
+end
+
+def iterate(cont)
+   it = cont.begin
+   last = cont.end
+   while it != last 
+     it.next
+   end
+end
+
+
+def erase(cont)
+   it = cont.end
+   # can't reuse begin since it might get invalidated
+   while it != cont.begin
+     it.previous
+     # set returns None, so need to reobtain end
+     it = cont.erase(it) || cont.end
+   end
+end
+
+def insert(cont)
+  size = cont.size
+  size.upto((size<<1) - 1) { |x| cont.push(x) }
+end
+
+if $0 == __FILE__
+  GC.disable
+  sequences = [RbVector,RbDeque,RbSet,RbList,
+               RbFloatVector,RbFloatDeque,RbFloatSet,RbFloatList]
+  n = 17
+  for f,phigh in [[method(:iterate),n], [method(:insert),n],
+                  [method(:erase),n-4]]
+    benchmark(f, phigh, sequences)
+  end
+end
+