Avoids mutating the original styles object

[vectorsize]

This still performs better and I think it does the trick :)

[javivelasco]

@raveclassic you battled a lot with themr, what do you think of this and the previous change @vectorsize did?

[raveclassic]

Thanks for the question!
Yes, after moving all our projects to react we are now integrating themr and it greatly improves our workflow especially in development of shared component libraries.
No doubt this change is a performance improval and I'm really looking forward to making this library mainstream.

[javivelasco]

Great!! I'm really happy it worked for you, thanks for your words! 😄