Loops make Less to run out of memory. (Structure o

I'm working on a less project, but as is start to become a bit big, every time that i'm trying to compile i run out of memory.

This is my current structure:

style.less

colors.less

icons.less

styles

style1

style2

style3

Now,

colors.less is a list of colors and their classes

icons.less a list of icons and their classes

style.less is the main file, where all is included and compiled

styles is a folder containing all the difference for every different style

my question (well, actually is more a suggestion than a question) is:

how can i optimize this structure so that i don't run out of memory anymore when trying to compile?

The process is the following:

colors.less and icons.less contains my arrays with color, icons and classes, nothing more.

I have both colors.less and icons.less included into style1.less,style2.less,style3.less, where i create a loop trough the colors.

Finally, i'll import everything into style.less (the main one) where i create a loop trough the icons and then add all the MIXINS to create the final result. the problem is that i can't compile as i run out of memory.

I'm pretty sure that there's something wrong on my structure or any way i can increase the memory (i'm compile using brunch -> this link for official website)

Any suggestion are really really appreciated.

Thanks a lot.

PS: for more information, just ask.

A partial answer, there's way to get rid of loops: color and icon data can be defined as mixins calls, here's mini example:

.colors() {
    // "array" of colors
    .-(Maroon, #800000);
    .-(Red,    #FF0000);
    .-(Orange, #FFA500);
    .-(Yellow, #FFFF00);
}

// generate color classes:

.some-prefix {
    .colors();
    .-(@name, @color) {
        &.@{name} {
            color: contrast(@color);
            background: @color;
            // etc.
        }
    }
}

Same for icons...