I've found that the only way to get accurate information about performance is to test it myself or use a source that actually gives data. I tested this myself a

I've found that the only way to get accurate information about performance is to test it myself or use a source that actually gives data. I tested this myself a while ago and found no detectable difference between single and double quotes. (And if I hadn't done this, I'd know not to trust this post:) )