analysis.txt

Environment information:
CPU: Core 2 Duo T7500 2.2 GHz
RAM: 4 GB
OS: Windows 7 x64 Ultimate
AV: Windows Security Essentials 2.1.1116.0 (WSE)
Profile: High Performance

HDD: ImDisk 1.5GB, 0% fragmentation

TMA runs:
```
FOR /L %G IN (1,1,10) DO ECHO %G && SLEEP 1 && file_access.exe >> results-wse-{on,off}[-ne].txt
```

Collected:
File exist, File not exist, both with WSE on and off.

Results processed:
+-----------------------+----------------+-------------------+-----------------+--------------------+
|                                              load_ok                                              |
+-----------------------+----------------+-------------------+-----------------+--------------------+
| Function              | Exist (WSE On) | No exist (WSE On) | Exist (WSE Off) | No exist (WSE Off) |
+-----------------------+----------------+-------------------+-----------------+--------------------+
| access()              |       48.72811 |          17.45623 |        23.66393 |           16.61612 |
| open()                |       77.29283 |          25.53095 |        61.56358 |           24.78415 |
| stat()                |     1206.39600 |          40.28003 |      1041.07350 |           62.45037 |
| OpenFile()            |       83.96732 |         539.50980 |        79.15986 |          493.39550 |
| CreateFile()          |       40.46673 |          18.80981 |        40.23338 |           18.52975 |
| GetFileAttributesEx() |       17.87629 |          12.92880 |        17.45623 |           12.92880 |
| GetFileAttributes()   |       12.69546 |          13.58225 |        12.64879 |           13.30219 |
+-----------------------+----------------+-------------------+-----------------+--------------------+

process.rb

require "terminal-table"

re = /^(.*)\:\s+(\d+\.\d+)/

group_names = {
  "Exist (WSE On)"     => "results-wse-on.txt",
  "No exist (WSE On)"  => "results-wse-on-ne.txt",
  "Exist (WSE Off)"    => "results-wse-off.txt",
  "No exist (WSE Off)" => "results-wse-off-ne.txt",
}

# build stats and store in rows
rows = Hash.new { |h, k| h[k] = [] }

group_names.each do |name, filename|
  stats = Hash.new { |h, k| h[k] = [] }
  File.open(filename, "r") do |f|
    f.readlines.each do |line|
      if m = line.match(re)
        key, value = m[1], m[2].to_f
        key.gsub!("time", "")
        stats[key.strip] << value
      end
    end
  end

  stats.each do |key, values|
    size = values.length.to_f
    sum = values.inject(0) { |acc, value| acc + value }
    avg = sum / size

    rows[key] << avg
  end
end

table = Terminal::Table.new :title => "load_ok" do |t|
  t.headings = ["Function", *group_names.keys]

  rows.each do |key, values|
    formatted = values.collect { |v| { :value => "%4.5f" % v, :alignment => :right } }
    t.add_row [key, *formatted]
  end
end

puts table