Performance, Lints, Improvements

[maierfelix]

• Use for statement for arrays instead of for-in
• Cache ctx member access and some loop lengths
• Splitted display->draw operations into seperate methods
• Strict equality comparisions
• Merged old pipe deletion into single routine
• Use bind instead of self

[bfricka]

Worth it for splice and --i :)

[xviniette]

I only used your pipes deletion system. Thank you ! :)