Is it bad to apply for a job immediately after it was posted? I am applying for jobs on mathjobs.org, and I regularly refresh the new postings page.

Sometimes I see jobs that I want to apply for right away, but I am not sure if it looks bad.  I am worried about coming across as desperate or I am trying for the shotgun effect.

Does it look bad to apply for a job soon after it was posted?

What I mean by "soon" is the day it was posted or a few days after.
I don't know how mathjob distributes candidates' applications to schools, but I doubt anyone cares. I put all applications I get for my job postings into a folder in no particular order and never look at the order of application. Someone has to be first. Go ahead! Apply away!