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-rw-r--r--lib/profiler.rb59
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/profiler.rb b/lib/profiler.rb
new file mode 100644
index 0000000..74e9b96
--- /dev/null
+++ b/lib/profiler.rb
@@ -0,0 +1,59 @@
+module Profiler__
+ Times = if defined? Process.times then Process else Time end
+ # internal values
+ @@start = @@stack = @@map = nil
+ PROFILE_PROC = proc{|event, file, line, id, binding, klass|
+ case event
+ when "call", "c-call"
+ now = Float(Times::times[0])
+ @@stack.push [now, 0.0, id]
+ when "return", "c-return"
+ now = Float(Times::times[0])
+ tick = @@stack.pop
+ name = klass.to_s
+ if name.nil? then name = '' end
+ if klass.kind_of? Class
+ name += "#"
+ else
+ name += "."
+ end
+ name += id.id2name
+ data = @@map[name]
+ unless data
+ data = [0.0, 0.0, 0.0, name]
+ @@map[name] = data
+ end
+ data[0] += 1
+ cost = now - tick[0]
+ data[1] += cost
+ data[2] += cost - tick[1]
+ @@stack[-1][1] += cost
+ end
+ }
+module_function
+ def start_profile
+ @@start = Float(Times::times[0])
+ @@stack = [[0, 0, :toplevel], [0, 0, :dummy]]
+ @@map = {"#toplevel" => [1, 0, 0, "#toplevel"]}
+ set_trace_func PROFILE_PROC
+ end
+ def stop_profile
+ set_trace_func nil
+ end
+ def print_profile(f)
+ stop_profile
+ total = Float(Times::times[0]) - @@start
+ if total == 0 then total = 0.01 end
+ @@map["#toplevel"][1] = total
+ data = @@map.values
+ data.sort!{|a,b| b[2] <=> a[2]}
+ sum = 0
+ f.printf " %% cumulative self self total\n"
+ f.printf " time seconds seconds calls ms/call ms/call name\n"
+ for d in data
+ sum += d[2]
+ f.printf "%6.2f %8.2f %8.2f %8d ", d[2]/total*100, sum, d[2], d[0]
+ f.printf "%8.2f %8.2f %s\n", d[2]*1000/d[0], d[1]*1000/d[0], d[3]
+ end
+ end
+end