Does asterisk (*) selector affect performance?

Hi,

I have built a user style for Facebook. There are 67 instances of the same code: border-color: #455770 !important. I'm considering putting a single instance of this into * { }, it would chop off 4 kB (about 10%) off the code.

Would this slow down the style loading time considerably?
And which one is worse? Repeating the same styling command 67 times for avoiding usage of *, or using * instead of filtered formatting?

Remark:

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