You're basically disabling speedstep and forcing the cpu to never change state or idle. May help responsiveness for something underpowered, and is very situation specific. As such, it's not good as a general setting.
The same thing can be accomplished in the bios, and when it's helpful would be the preferred place for such tweaks. Then you don't rely on software settings. Whether or not a particular bios exposes the settings and where varies, but are usually under some 'custom' profile for power settings. A few c-state settings, maybe power duration limits, clock rates and ratios...depends on generation, model, and board vendor.
Most OS's should be set to allow a driver take over, or with newer cpu's allow it to self manage bin state. There should be a good reason determined before changing this, and those are few.
You'd be better served to install whatever utility is appropriate for the generation and write to sysfs to control minimal clock while you need it, then return to a default when your done. Assuming a locked out dumbed down bios...Sandy bridge is a dividing line for methods, before and after, and maybe not all newer ones yet?