compare all of upx's compressions levels on your binary with this script or something

upx-outputs.rb

# execute as "ruby upx-outputs.rb BINARYNAME
# you will get BINARYNAME-.txt and BINARYNAME-full.txt (contains upx's shell output)
require "digest"

compression_levels = 1..9
file_name = ARGV[0]
file_logs = ""
full_logs = ""
compression_levels.each do |level|
	output_file = "#{file_name}-#{level}"
	command = "./upx -#{level} -o #{output_file} #{file_name}"
	puts command
	command_exec = `#{command}`
	file_size = File.size(output_file) / 1024 # filesize as kb
	file_hash = Digest::MD5.file(output_file).hexdigest
	file_logs += "#{output_file}: #{file_size}kb - #{file_hash}\n"
	full_logs += "#{output_file}: #{file_size}kb - #{file_hash}\n#{command_exec}\n++++++++\n"
	command_exec = `rm -rf #{output_file}`
end

File.write("#{file_name}.txt", file_logs)
File.write("#{file_name}-full.txt", full_logs)
puts "finished"