Infinity and NaN are not optimized

[anonyco]

Infinity and -Infinity can be optimized into 1/0 and -1/0 respectively. NaN can be optimized into 0/0. While there is no size benefit to optimizing NaN, there is a performance benefit. NaN is a window property. As such, using NaN forces the browser to add in extra checks incaseif window.NaN is changed by some oafish moron as per the W3 spec which (unfourtunatly) permits the free roam of such idiots.

[Dominator008]

In general we don't optimize specifically for performance and I doubt the difference is significant. Also, strict mode will prevent reassignment of window.NaN.