C:\>ruby test.rb
test 1 - Battery Saving Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
2.111121
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.786102
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.820104
t=Time.now; for j in range; y = j + 1; end; Time.now-t
2.059118
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
2.062118

C:\>ruby test.rb
test 1 - Battery Saving Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
1.994114
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.803103
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.799103
t=Time.now; for j in range; y = j + 1; end; Time.now-t
2.064118
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
2.061118

C:\>ruby test.rb
test 2 - Quiet Office Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
2.573147
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
2.594148
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
2.564147
t=Time.now; for j in range; y = j + 1; end; Time.now-t
2.946168
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
2.946169

C:\>ruby test.rb
test 3 - Entertainment Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
1.05506
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.04906
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.05306
t=Time.now; for j in range; y = j + 1; end; Time.now-t
1.205069
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
1.205069

C:\>ruby test.rb
test 4 - High Performance Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
1.05206
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.04506
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.072062
t=Time.now; for j in range; y = j + 1; end; Time.now-t
1.206069
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
1.213069

C:\>ruby test.rb
test 4 - High Performance Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
1.04806
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.039059
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.064061
t=Time.now; for j in range; y = j + 1; end; Time.now-t
1.212069
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
1.205069

C:\>ruby test.rb
test 4 - High Performance Mode
range = (0..10000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
1.063061
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
1.04206
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
1.067061
t=Time.now; for j in range; y = j + 1; end; Time.now-t
1.206069
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
1.206069

C:\>
C:\>ruby test.rb
test 4 - High Performance Mode
range = (0..90000000)
t=Time.now; range.each { |i| x = i + 1 }; Time.now-t
9.478543
t=Time.now; x=0; range.each { |i| x = i + 1 }; Time.now-t
9.343534
t=Time.now; x=0; i=0; range.each { |i| x = i + 1 }; Time.now-t
9.509544
t=Time.now; for j in range; y = j + 1; end; Time.now-t
10.854621
t=Time.now; y=0; for j in range; y = j + 1; end; Time.now-t
10.853621

C:\>