使用@ font-face将自定义字体上传到css doc是否会使渲染速度变慢？

I downloaded a font from dafont.com and then added it to the stylesheet for a html file that's currently just on my computer. I changed most of the buttons to use that font, but now it seems to load way slower (it used to render almost instantly in my browser) because of the custom font. Is there a way I can fix this for the files local to my computer, and will it also cause the pages to render slowly once it's actually uploaded to a website?I downloaded a font from dafont.com and then ad